September is the hottest month in Los Angeles. That surprises people who assume August holds the record, but LA's inland valleys routinely hit 38°C (100°F) or higher during September heat waves, and the basin averages 30.4°C (87°F) for daytime highs. The marine layer that keeps June and early July mild has burned off completely by now. You feel it the moment you step outside in Pasadena or the San Fernando Valley, where the air sits heavy and still by early afternoon.
The trade-off is real, though. Summer crowds thin out after Labor Day weekend (the first Monday in September), and hotel rates tend to drop 15-25% from their July-August peak. The beaches from Santa Monica to Manhattan Beach still have ocean water around 19°C (66°F), warm enough for swimming without a wetsuit. And the cultural calendar picks back up as venues like Walt Disney Concert Hall and the Hollywood Bowl schedule their fall programming.
The wildcard is fire. September and October are peak wildfire months for Southern California, and Santa Ana winds can push smoke from the foothills across the entire basin within hours. In a bad year, the sky turns orange and the air quality drops to unhealthy levels for days at a time. Most Septembers are fine on this front, but it's worth checking AirNow.gov before booking outdoor activities, especially anything near Griffith Park or the Santa Monica Mountains.
Why visit in September
- Summer tourist crowds drop noticeably after Labor Day (first Monday in September), with shorter lines at The Broad, the Getty Center, and popular trailheads like Runyon Canyon
- Ocean water temperatures near Santa Monica and Malibu hover around 19°C (66°F), the warmest of the year, and beaches are far less packed than July or August
- Hotel rates across Hollywood, Downtown, and Santa Monica typically fall 15-25% from summer peak pricing, and weekend availability improves dramatically
- The cultural season restarts. The Los Angeles Philharmonic opens at Walt Disney Concert Hall in late September, and the Hollywood Bowl still has concerts through mid-month
- Late-harvest produce peaks at farmers markets across the city. September is prime fig, grape, and Hatch chile season in Southern California
Worth knowing
- This is statistically the hottest month in the LA basin, with inland neighborhoods like Pasadena, Woodland Hills, and Burbank regularly exceeding 38°C (100°F) during heat waves. Midday outdoor activities require serious planning
- Wildfire risk peaks in September and October. Santa Ana wind events can blanket the city in smoke, dropping air quality to hazardous levels with little warning. Respiratory-sensitive travelers should have a backup plan
- The contrast between coastal and inland temperatures is extreme. Santa Monica might be 24°C (75°F) while Pasadena is 40°C (104°F) on the same afternoon, making it easy to misjudge conditions
Best for
Think twice if
September in Los Angeles is hot and dry, with average highs of 30.4°C (87°F) and lows around 17.9°C (64°F). Rainfall is minimal at 22mm across roughly 2 rainy days, typically in brief afternoon episodes. Humidity sits at 68%, which is higher than most people expect for LA. The marine layer is gone, so mornings are clear and warm rather than the overcast pattern of June. Inland areas like the San Fernando Valley and Pasadena regularly exceed 35°C (95°F), while coastal neighborhoods from Venice to Hermosa Beach stay 5-8°C cooler thanks to ocean breezes. Late September occasionally brings the first Santa Ana wind events, which can spike temperatures even higher for 2-3 days.
Seasonal caution
- Heat waves are common in September, with inland neighborhoods like Woodland Hills, Pasadena, and Riverside regularly exceeding 38°C (100°F) for 3-5 consecutive days. The National Weather Service issues Excessive Heat Warnings several times most Septembers. Carry water constantly and avoid exposed trails between 11 AM and 4 PM
- September marks the start of peak wildfire season in Southern California. Santa Ana winds, which blow hot and dry from the inland deserts toward the coast, can appear with 48-72 hours of notice and carry smoke from distant fires across the LA basin. Monitor AirNow.gov and the South Coast AQMD site for real-time air quality by ZIP code
- UV index in Los Angeles averages 7-8 in September, which is considered 'high' to 'very high' by WHO standards. Sunburn can occur in under 20 minutes of unprotected exposure at midday
Year-round climate
Averages from the last 5 years.
| Month | Avg high (°C) | Avg low (°C) | Rainfall (mm) |
|---|---|---|---|
| Jan | 19 | 7 | 85 |
| Feb | 20 | 8 | 110 |
| Mar | 20 | 9 | 85 |
| Apr | 24 | 11 | 8 |
| May | 25 | 13 | 7 |
| Jun | 28 | 15 | 10 |
| Jul | 31 | 17 | 2 |
| Aug | 32 | 18 | 18 |
| Sep | 30 | 18 | 22 |
| Oct | 27 | 15 | 18 |
| Nov | 23 | 11 | 57 |
| Dec | 19 | 9 | 132 |
Best things to do in September
Swim and bodysurf at Manhattan Beach after Labor Day
beachThe 2-mile (3.2 km) stretch of sand at Manhattan Beach clears out considerably once school resumes in early September. Ocean water temperatures hover around 19°C (66°F), the warmest of the year. The Strand walkway connects Manhattan Beach to Hermosa and Redondo for a longer coastal walk without the July crowds.
September has the warmest ocean water of the year, and post-Labor Day crowds drop by roughly half compared to August weekendsBooking tipParking near Manhattan Beach Pier fills by 10 AM on weekends. The paid lot on Highland Avenue tends to have spots when the pier lot is full.
Catch a late-season concert at the Hollywood Bowl
cultureThe Hollywood Bowl's outdoor season typically runs through mid-to-late September. The 17,500-seat amphitheater in the Hollywood Hills is at its best on warm September evenings, when the sun sets behind the hills during the opening numbers. Bring a picnic and a bottle of wine. The sound bounces off the shell in a way that rewards decent seats in the center sections.
The Hollywood Bowl season ends in September, making this the last chance until next summer. Evening temperatures around 22-24°C are ideal for outdoor concertsBooking tipWeeknight shows are significantly cheaper and easier to get. The Park & Ride shuttle from various locations saves the headache of Bowl parking.
Visit the Getty Center on a clear September afternoon
cultureThe Getty Center sits at 275 meters (900 feet) elevation in the Brentwood hills, catching ocean breezes that the rest of the city misses. The air-conditioned galleries are an obvious escape from the heat, but the Central Garden is worth the sweat. September light at the Getty has a particular golden quality in late afternoon that photographers plan around. On clear days, you can see from Downtown to Catalina Island.
Fewer visitors than summer, the hilltop location is 5-8°C cooler than the valley floor, and September's late-afternoon light is exceptional for the outdoor sculpture collectionBooking tipTimed-entry reservations are free but still required. Weekday afternoons after 2 PM tend to have the most availability.
Hike Griffith Park at dawn before the heat builds
outdoorThe trail network around Griffith Observatory and up to the Hollywood Sign covers over 80 km (50 miles) of paths through chaparral hillsides. In September, the only sensible window is early morning. The trailhead at the Charlie Turner gate opens at sunrise, and you'll want to be moving by 6:30 AM. The reward is golden light over the LA basin, often with a thin marine layer still visible along the coast.
September's extreme heat makes dawn the only comfortable hiking window, but it also means you get the trails largely to yourself and the best light of the dayBooking tipThe Griffith Observatory parking lot fills fast on weekends even at dawn. Consider parking on the residential streets along Fern Dell Drive and walking up.
Explore the LA County Fair in Pomona
festivalThe LA County Fair at the Fairplex in Pomona draws over a million visitors during its September-to-early-October run. It's a full county-fair experience with livestock competitions, deep-fried everything, carnival rides, and live music. The fair dates back to 1922. The food competitions alone are worth the 30-mile drive east from central LA. Mind you, Pomona runs even hotter than the rest of the basin, so go in the evening.
The LA County Fair runs from early September through early October, and weekday evenings in September are the least crowded windowBooking tipBuy tickets online for a small discount. Thursday evenings tend to be the quietest. The Metrolink train runs special Fair service from Union Station that avoids the parking nightmare.
Day trip to Santa Barbara County wine country for harvest season
day tripSeptember is crush season in the Santa Ynez Valley and Los Olivos, about 2 hours north of LA on Highway 101. Wineries are actively harvesting Pinot Noir and Syrah grapes, and many offer harvest-themed tastings or let visitors watch the sorting and crushing process. The valley runs 5-8°C cooler than LA's inland areas, making it a genuine escape from the heat.
September is grape harvest season in Santa Barbara County. Several wineries run harvest events that are only available during the 3-4 week crush windowBooking tipWeekday visits need no reservations at most smaller wineries. Weekend tasting appointments at popular spots like Bien Nacido and Foxen should be booked a week ahead.
Eat your way through Grand Central Market on a hot afternoon
foodGrand Central Market on South Broadway in Downtown LA has operated since 1917 and currently houses about 40 food vendors under one roof. The indoor hall stays cooler than the street and makes a solid midday refuge in September. Walk from Tacos Tumbras a Tomas at one end to Sticky Rice at the other. The diversity of the stalls reflects the surrounding Downtown neighborhoods.
September heat makes indoor food halls more appealing than outdoor dining at midday, and the market is less crowded than summer tourist seasonAttend the Abbot Kinney Festival in Venice
festivalThe Abbot Kinney Festival takes over the mile-long stretch of Abbot Kinney Boulevard in Venice on the last Sunday of September. Around 300 vendors, food trucks, and live music stages line the street. It's free to attend and draws a heavy local crowd from Venice, Mar Vista, and Santa Monica. The block between Venice Boulevard and Westminster Avenue tends to have the best food options.
The Abbot Kinney Festival only happens once a year, on the last Sunday of SeptemberBooking tipDo not drive. Take the Metro E Line to Culver City station and walk or rideshare the last mile. Street parking within a 1-mile radius fills by 9 AM.
What to eat in September
In season: fruit
Black Mission figs
September is peak fig season in Southern California. The Santa Monica Wednesday Farmers Market and Hollywood Sunday Farmers Market carry Black Mission, Brown Turkey, and Kadota varieties from local farms. The fruit is fragile and ships poorly, so what you find at LA farmers markets in September tends to be riper and sweeter than anything in a grocery store back home.
Late-season white peaches and pluots
The tail end of California stone fruit season overlaps with early September. Flavor King pluots and white peaches from farms in Fresno and Reedley County show up at the Hollywood Farmers Market through mid-month. Once they're gone, they're gone until next June.
On menus now
Korean cold noodles (naengmyeon)
Koreatown restaurants along 6th Street and Western Avenue serve buckwheat noodles in icy broth as a hot-weather staple. September's lingering heat makes this dish feel less like a novelty and more like a necessity. Several spots on 8th Street keep it on the menu through the end of the month before switching to heavier stews.
What to drink
Agua fresca de horchata
The September heat makes this rice-milk drink with cinnamon particularly welcome. Grand Central Market in Downtown has multiple vendors selling it fresh. Street carts around MacArthur Park and along Broadway in DTLA offer large cups for a few dollars.
In markets
Hatch green chiles
September is Hatch chile season, and several LA farmers markets and specialty grocers roast them on-site in large tumbling drums. The smell of charring chiles carries across the parking lot at the Santa Monica market. Vendors from New Mexico ship the harvest to Southern California for about 4-6 weeks starting in late August.
Festival food
Elote and tamales at Mexican Independence Day celebrations
Street vendors around Olvera Street and in East LA neighborhoods sell grilled corn (elote) with mayo, cotija, and chile powder, along with fresh tamales, during the September 15-16 festivities. The smell of roasting corn and simmering masa fills the streets around the Plaza de Cultura y Artes.
Regular events in September
LA County Fair
Southern California's largest county fair, running since 1922, with livestock shows, carnival rides, competitive exhibits, and deep-fried fair food. Held at the Fairplex in Pomona, about 30 miles east of Downtown LA.
Early September through early October (runs roughly 4 weeks)Abbot Kinney FestivalFree
Free street festival on Abbot Kinney Boulevard in Venice with approximately 300 vendors, live music stages, and food trucks spanning the full mile of the boulevard.
Last Sunday of SeptemberMexican Independence Day celebrations at Olvera StreetFree
The historic block of Olvera Street and surrounding Placita Olvera in Downtown LA hosts live mariachi, folklorico dancing, and food vendors for Mexico's Independence Day. The main event is the Grito de Independencia ceremony on the evening of September 15.
September 15-16Los Angeles Philharmonic season opening gala
The LA Phil opens its fall-winter season at Walt Disney Concert Hall in Downtown LA, typically with a high-profile program and conductor Gustavo Dudamel on the podium. The Frank Gehry-designed concert hall is worth seeing even if classical music is not your primary interest.
Late September (usually the last week)Primetime Emmy Awards
The television industry's main awards ceremony, typically held at the Peacock Theater at LA Live in Downtown LA. The event itself is closed to the public, but the surrounding blocks see road closures, red-carpet setup, and general industry buzz for several days. Nearby restaurants and bars fill with after-party crowds.
Mid-September (varies by year)DTLA Art WalkFree
Self-guided walk through the galleries and studios of the Downtown LA Arts District, held on the second Thursday of each month. Free gallery openings along Spring Street and in the Arts District between 4th Street and 7th Street.
Second Thursday of SeptemberBest places this September
El Matador State Beach
beachThis small cove beach in Malibu, about 30 minutes up Pacific Coast Highway from Santa Monica, has sea stacks and rock formations that catch September's golden-hour light in a way that draws photographers year-round. In September, the parking lot (which only holds about 30 cars) is noticeably less contested than summer. The water is warm enough for wading, and the cliffs block wind. You'll need to climb a short, steep trail down from the bluff.
MalibuGriffith Observatory
landmarkThe observatory sits at 345 meters (1,134 feet) on the south slope of Mount Hollywood, facing the LA basin. September's dry air and reduced summer haze make for some of the clearest sunset views of the year, though wildfire smoke can obviously cancel that. The building itself is free to enter, and the planetarium shows cost a few dollars. The west-facing terrace is the spot for watching the sun drop behind the Santa Monica Mountains.
Los FelizThe Getty Center
museumThe hilltop campus in Brentwood stays several degrees cooler than the valley below, and the air-conditioned galleries offer genuine relief from September heat. The Central Garden, designed by Robert Irwin, changes with the seasons. September catches the garden in late-summer bloom before the fall transition. Free admission and free parking after 3 PM.
BrentwoodGrand Central Market
food hallOperating since 1917 on South Broadway between 3rd and 4th Streets in Downtown, this indoor food hall is a practical choice on hot September days. The building stays cool, the vendor mix runs from Mexican to Thai to Jewish deli, and it sits directly across from Angels Flight, the 90-meter (298-foot) funicular railway.
DowntownVenice Canals
neighborhood walkThe residential canal system south of Venice Beach, originally built in 1905, is one of the quieter walks in the area. In September, the post-summer drop in foot traffic makes the canal paths feel almost private in the late afternoon. The houses along the canals range from 1920s bungalows to modern glass boxes. Walk south from Venice Boulevard along Dell Avenue to start.
VeniceSanta Monica Pier and beach
beachThe pier itself is a tourist fixture, but the real draw in September is the 3.5-mile (5.6 km) beach stretching south toward Venice. Post-Labor Day, you can actually find space to lay a towel without negotiating with your neighbors. The ocean at 19°C (66°F) is comfortable for swimming. The Original Muscle Beach fitness area near the pier is free and open.
Santa MonicaKoreatown
neighborhoodLA's Koreatown, roughly bounded by Wilshire Boulevard to the south and Beverly Boulevard to the north between Vermont and Western Avenues, is at its most appealing when you need to escape the heat. Many Korean BBQ spots, karaoke rooms, and dessert cafes are open well past midnight. September's warm nights make the late-dining culture here feel natural rather than forced. The 6th Street corridor between Normandie and Western has a high concentration of restaurants.
KoreatownThe Broad
museumThe contemporary art museum on Grand Avenue in Downtown, housing the Broad collection of postwar and contemporary art, is air-conditioned and free to enter with a timed reservation. September tends to have more same-day availability than summer months. The Infinity Mirror Room by Yayoi Kusama still requires a separate timed entry, so arrive early to grab a slot.
Downtown
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Insider tips
The Getty Center's hilltop garden catches an ocean breeze that the rest of West LA misses entirely. On a 35°C day in the valley below, the Getty terrace feels 5-8 degrees cooler. Go after 3 PM when parking becomes free and the afternoon light hits the travertine facades.
Koreatown's late-night dining scene is a better option than Hollywood or West Hollywood when September temperatures stay above 25°C after dark. Most Korean BBQ spots and noodle houses along 6th Street and Western Avenue serve until midnight or later on weekends, and the air-conditioned interiors make the heat a non-issue.
The Santa Monica Farmers Market on Wednesday mornings at Arizona Avenue has September figs and late-season stone fruit that rarely make it to grocery stores. Arrive before 9 AM for the best selection. The Saturday morning market at Virginia Avenue Park is smaller but less tourist-heavy.
If Santa Ana winds are forecast, skip the canyons and head to the coast. The temperature difference between Downtown and Manhattan Beach can reach 15°C on a Santa Ana day. The NWS Los Angeles Twitter account posts Red Flag Warnings 24-48 hours ahead.
The Metro E Line (formerly Expo Line) runs from Downtown to Santa Monica in about 50 minutes for a few dollars. On hot September days, it beats sitting in traffic on the 10 freeway with no shade, and the air-conditioned train cars are a small mercy.
Avoid these mistakes
- Booking a midday hike to the Hollywood Sign in September. The trail from the Griffith Observatory side has long stretches with zero shade, and exposed hillside temperatures regularly exceed 35°C (95°F) between 11 AM and 4 PM. Start before 7 AM or go after 5 PM. People end up calling for rescue on this trail every hot month.
- Assuming the coast and inland areas have the same weather. Santa Monica might be a comfortable 24°C (75°F) while Pasadena is 40°C (104°F) on the same afternoon. Always check the forecast for the specific neighborhood you're visiting, not the generic 'Los Angeles' reading, which typically reflects the basin average.
- Planning outdoor activities without checking air quality first. Wildfire smoke events have disrupted at least 3-5 days in several recent Septembers, sometimes with almost no advance warning. AirNow.gov gives real-time readings by ZIP code. A smoke day means no hiking, no beach, and limited outdoor dining.
- Driving everywhere without considering the heat penalty. Walking from a distant parking spot to a restaurant in Silver Lake or a gallery in the Arts District at 2 PM in September is far more draining than the same walk in October. Park closer or rideshare for midday errands, and save the walking for morning or evening.
Practical tips for September
Book hotels for the week after Labor Day rather than the week containing it. Labor Day weekend (first Monday in September) still carries summer-peak pricing and crowds at beaches and attractions, but rates typically drop 15-25% by the following Tuesday. Rental car prices also fall after the holiday weekend. For Hollywood Bowl concerts, which run through mid-to-late September, buy tickets as soon as they're available. The closing-night shows sell out fast. Walt Disney Concert Hall subscriptions for the LA Phil season go on sale before September, but single tickets for the late-September opening concerts are usually available a few weeks ahead. If you're planning day trips to Santa Barbara wine country or Joshua Tree, fill your gas tank in the city. Gas stations in smaller towns along the route charge more, and September heat means running the AC constantly, which eats fuel faster than you'd expect. Dress codes in LA are casual year-round, but a few restaurants along Melrose, in Beverly Hills, and in Downtown's South Park area expect closed-toe shoes and collared shirts for dinner. Check before you go in flip-flops.
FAQ
Is September a good time to visit Los Angeles?
September is a solid month if you can handle the heat. It's the hottest month in the LA basin, with average highs of 30.4°C (87°F) and inland areas frequently reaching 38°C (100°F) during heat waves. The trade-off is fewer tourists after Labor Day, hotel rates 15-25% below summer peak, and the warmest ocean water of the year at 19°C (66°F). The main risk is wildfire smoke, which can appear with limited warning and shut down outdoor plans for several days. If you're heat-tolerant and flexible with your itinerary, September offers good value. If you run hot or have respiratory concerns, October is a safer bet.
What is the weather like in Los Angeles in September?
Expect average highs of 30.4°C (87°F) and lows of 17.9°C (64°F), with humidity around 68%. Rainfall is minimal at 22mm across roughly 2 rainy days. Coastal neighborhoods like Santa Monica and Venice stay 5-8°C cooler than inland areas like Pasadena and the San Fernando Valley, where midday temperatures regularly pass 35°C. The marine layer that keeps June gloomy is gone by September, so mornings are clear and sunny. Late September occasionally brings the first Santa Ana wind events, which push temperatures even higher for 2-3 day stretches.
Is Los Angeles crowded in September?
Noticeably less so than July and August. After Labor Day weekend (first Monday in September), summer tourist crowds thin out as families head home for the school year. Popular attractions like The Broad, the Getty Center, and Griffith Observatory have shorter wait times, and beach parking at Santa Monica and Manhattan Beach is easier to find. That said, LA is a metro area of over 13 million people, so 'less crowded' is relative. Weekend traffic on the 405 and the 10 freeway is still heavy. The Abbot Kinney Festival on the last Sunday of September draws large local crowds to Venice.
Can you swim in the ocean in Los Angeles in September?
Yes, and September is arguably the best swimming month. Ocean water temperatures near Santa Monica, Manhattan Beach, and Malibu hover around 19°C (66°F), the warmest they reach all year. That's cool by tropical standards but comfortable for swimming, bodyboarding, and surfing without a full wetsuit. A thin rash guard or spring suit might feel nice for longer sessions. Lifeguards are still on duty at county beaches through September, though coverage may be reduced from summer levels at some towers after Labor Day.
Is wildfire smoke a problem in Los Angeles in September?
It can be. September and October are the peak months for wildfire risk in Southern California, particularly when Santa Ana winds blow hot, dry air from the inland deserts toward the coast. In bad years, smoke from nearby or distant fires can reduce visibility and push air quality to unhealthy or hazardous levels across the basin for days at a time. Most Septembers only see a few impacted days, and many have none at all. The best strategy is to monitor AirNow.gov daily and have indoor backup plans, like museums and Koreatown restaurants, ready to go.
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