September is, to be fair, one of the finest months to be in Boston. The single most important thing to know is that roughly 250,000 university students flood back into the city during the first week, filling Allston, the Fenway, and Cambridge with moving trucks and orientation crowds. Daytime highs settle around 23°C (73°F), mornings start crisp near 15°C (58°F), and the thick humidity of July and August has mostly broken. The summer tourist crush along the Freedom Trail thins noticeably after Labor Day, which falls on the first Monday of the month.
The timing within September matters quite a bit. The first week tends to be chaotic in college neighborhoods. U-Haul trucks double-park on Commonwealth Avenue, and hotel availability near Boston University and Northeastern can be tight through orientation. By mid-month, the city finds its rhythm. The elms in Boston Common haven't turned yet, but you might catch early orange creeping into the maples at Arnold Arboretum by the last week. Evenings cool enough that you'll want a layer for any walk along the waterfront in the Seaport District.
September also marks the return of Boston's cultural season after the summer lull. The Boston Symphony Orchestra opens at Symphony Hall, typically in the third or fourth week. Red Sox games at Fenway Park carry late-season weight, and the restaurant scene in the South End and North End shifts from tourist-heavy to a more local crowd. The water temperature in Boston Harbor still hovers around 18°C (64°F), warm enough for comfortable ferry rides to the Harbor Islands. It's a transitional month in the best way. Summer's warmth lingers in the afternoon, but the air has that dry, clear quality that signals autumn is close.
Why visit in September
- Temperatures between 15°C and 23°C (58-73°F) make walking the Freedom Trail and Beacon Hill comfortable all day, without the sweat-soaked misery of July
- Tourist crowds drop sharply after Labor Day, meaning shorter lines at the New England Aquarium, the Isabella Stewart Gardner Museum, and along the Harborwalk
- Apple-picking season and oyster season both begin in September, so the food scene shifts toward peak New England flavors at restaurants across the South End and North End
- The cultural calendar restarts after summer. The BSO, Boston Ballet, and theater companies along Tremont Street all open their fall seasons
- Late September brings the first hints of fall color at Arnold Arboretum and along the Emerald Necklace, a preview of October's full display without October's premium hotel rates
Worth knowing
- The first week of September is move-in chaos in Allston, Brighton, and the Fenway. Streets clog with trucks, and hotels near universities fill at inflated rates
- Rainfall averages 129mm across about 10 rainy days, and remnants of Atlantic tropical storms can occasionally bring 2 to 3 days of heavy, persistent rain
- Hotel rates remain 20-35% above the annual average through most of the month, driven by back-to-school demand and the return of business travel
- The harbor islands ferry service shifts from summer to fall schedule after Labor Day, with fewer departures to Georges Island and Spectacle Island
Best for
Think twice if
September in Boston feels like a slow exhale after summer. Early in the month, afternoons can still push toward 27°C (81°F) with noticeable humidity. By the final week, you might wake to 10°C (50°F) mornings with fog over the Charles River. The 77% average humidity is a step down from August but still enough that cotton breathes better than synthetics during midday walks. Rain arrives in bursts. You'll get a run of 3 or 4 clear days, then a solid day of steady rain, sometimes two in a row if a coastal system stalls. The light shifts noticeably through the month. Sunset moves from about 7:10 PM on September 1 to 6:25 PM by the 30th, which cuts into evening outdoor time.
Seasonal caution
- Atlantic hurricane season runs through November, and while direct strikes on Boston are rare, remnants of tropical systems can bring 50-100mm of rain in a single day with 1 to 2 weeks of notice at most. Check forecasts before booking outdoor excursions to the Harbor Islands or Cape Cod day trips.
Year-round climate
Averages from the last 5 years.
| Month | Avg high (°C) | Avg low (°C) | Rainfall (mm) |
|---|---|---|---|
| Jan | 3 | -5 | 113 |
| Feb | 4 | -6 | 77 |
| Mar | 9 | -1 | 113 |
| Apr | 14 | 4 | 86 |
| May | 20 | 10 | 111 |
| Jun | 26 | 16 | 77 |
| Jul | 29 | 19 | 134 |
| Aug | 27 | 18 | 89 |
| Sep | 23 | 15 | 129 |
| Oct | 18 | 9 | 110 |
| Nov | 11 | 2 | 65 |
| Dec | 6 | -2 | 111 |
Best things to do in September
Walk the Freedom Trail end to end
sightseeingThe 4-km brick-lined path from Boston Common to the Bunker Hill Monument in Charlestown passes 16 historic sites, including the Old North Church, Paul Revere's house, and Faneuil Hall. September's mild temperatures make the full walk comfortable without the July heat that turns the shadeless stretches into an endurance test.
Post-Labor Day crowds thin by 30-40%, and temperatures around 22°C make the 90-minute walk pleasant rather than punishing.Booking tipStart before 9 AM at Boston Common to reach the North End sites before the lunch rush fills Hanover Street.
Kayak or sail on the Charles River
outdoorThe Charles River Esplanade stretches 5 km along the Boston bank, and Community Boating near the Longfellow Bridge rents sailboats and kayaks to the public. The river is calm in September, and the views of the Back Bay skyline and MIT across the water are particularly clear on low-humidity afternoons.
Water temperature is still tolerable if you capsize, humidity has dropped, and the sailing season typically ends in late October, so September is the sweet spot.Booking tipCommunity Boating offers short-term memberships. Weekday afternoons tend to have the shortest waits for boats.
Day trip to apple orchards in the Nashoba Valley
day_tripNashoba Valley, about 50 km northwest of Boston, has over a dozen pick-your-own orchards. Honeycrisp, McIntosh, and Cortland varieties ripen through September. The drive on Route 2 takes about 45 minutes from Cambridge, passing through Concord and Lexington along the way.
Early-season apple varieties peak in September, and the orchards are less crowded than they'll be during October's peak foliage weekends.Booking tipGo on a weekday if possible. Weekend mornings at popular orchards like Shelburne Farm in Stow can have 30-minute waits at the entrance.
Explore the Boston Harbor Islands
outdoorThe Harbor Islands National and State Park includes 34 islands, with Georges Island (home to Fort Warren, a Civil War-era granite fortress) and Spectacle Island (beaches, walking trails, hilltop views) being the most visited. Ferries depart from Long Wharf, about a 45-minute ride.
September's reduced ferry schedule still runs enough departures for a full day trip, and the islands are noticeably quieter than July and August. Water temperature around 18°C makes the ferry ride comfortable.Booking tipCheck the fall ferry schedule after Labor Day, as departures drop from hourly to every 2 to 3 hours.
Visit the Isabella Stewart Gardner Museum
cultureThe museum in the Fenway neighborhood holds about 7,500 works in a Venetian-style palazzo built in 1903. The interior courtyard, planted with seasonal flowers, changes with the month. September typically features nasturtiums and chrysanthemums. The empty frames from the 1990 theft still hang in the Dutch Room.
The fall exhibition season opens in September, and the museum's small galleries feel less cramped without peak-summer crowds.Booking tipTimed-entry tickets are required. Book at least a few days ahead for weekend visits.
Catch a Red Sox game at Fenway Park
sportsFenway Park, built in 1912 and seating 37,755, is the oldest active ballpark in Major League Baseball. The Green Monster in left field stands 11.3 meters tall. September games often carry playoff implications, which raises the energy in the park noticeably compared to mid-summer games.
September is the final month of the regular season. The pennant-race atmosphere, combined with comfortable evening temperatures around 17°C, makes for memorable late-season games.Booking tipSeats along the first-base line and in the bleachers tend to be more available than those behind home plate. Buy early for weekend games against rivals like the Yankees.
Walk through Mount Auburn Cemetery
natureMount Auburn in Cambridge, founded in 1831, was the first landscaped cemetery in the United States. It covers 70 hectares with over 5,000 trees, ponds, and walking paths. The tower at the cemetery's highest point offers views of the Boston skyline, 10 km to the east.
Early fall color begins in the maples and oaks by mid-September. The birdwatching is strong too, with fall migration bringing warblers and thrushes through the grounds.Booking tipFree to enter. Open daily from 8 AM. The paths are hilly, so wear sturdy shoes.
What to eat in September
In season: fruit
Concord grapes
Native to eastern Massachusetts, Concord grapes reach peak ripeness in mid to late September. Deep purple, intensely sweet-tart, with that slip-skin texture. You'll find them at the Copley Square Farmers Market and the SoWa Open Market in the South End.
Cranberries
The cranberry bogs on Cape Cod and in southeastern Massachusetts begin their wet harvest in late September. Fresh cranberries appear at farm stands and farmers markets around the city, tart enough to make your mouth pucker. Restaurants start working them into sauces and cocktails for the fall menu shift.
On menus now
New England clam chowder
Chowder is year-round in Boston, but September's cooling temperatures make it feel right again after months of being too heavy for the humidity. The thick, creamy bowls at Legal Sea Foods or the Atlantic Fish Company in Back Bay tend to hit differently when there's a chill in the air.
Street food peaks
Apple cider donuts
Massachusetts apple season opens in September, and farm stands within an hour of Boston start frying cider donuts. Warm, coated in cinnamon sugar, with that dense, slightly tangy interior from the fresh cider in the batter. You'll smell them before you see the stand.
In markets
Wellfleet and Island Creek oysters
September starts the 'R months,' the traditional oyster season in New England. Wellfleet oysters from Cape Cod and Island Creek oysters from Duxbury appear on raw bars across the city, briny and cold. The Neptune Oyster in the North End and Row 34 in the Seaport District are likely to have the freshest selection.
Regular events in September
Boston Arts FestivalFree
Free outdoor arts festival on the Greenway, typically featuring over 50 local artists, live music, and craft demonstrations. It draws around 40,000 visitors over a single weekend in mid-September.
Mid-September weekendBoston Local Food FestivalFree
The Rose Fitzgerald Kennedy Greenway hosts this free festival celebrating New England producers. Local farms, fishermen, and food artisans set up stalls along the park. Expect samples of clam chowder, oysters, and fall produce from Massachusetts farms.
Mid-September, usually a SundaySoWa Open Market SundaysFree
The South End's weekly open-air market at 460 Harrison Avenue runs every Sunday through October. Around 100 vendors sell handmade goods, vintage items, and prepared food. The farmers market component features late-summer and early-fall produce from regional farms.
Every Sunday, 10 AM to 4 PMHead of the Charles preview eventsFree
While the main Head of the Charles Regatta falls in October, September sees rowing teams begin training runs on the Charles River. You'll see collegiate and club crews practicing between the BU Bridge and the Eliot Bridge most mornings. The Boston rowing community becomes visibly active along the Esplanade.
Throughout SeptemberRed Sox late-season home games
The Red Sox typically play 12 to 14 home games at Fenway Park in September. Late-season matchups against division rivals draw sell-out crowds. Lansdowne Street and the bars on Brookline Avenue fill before and after games.
Throughout SeptemberBest places this September
Arnold Arboretum
natureHarvard's 107-hectare living museum of trees and shrubs in Jamaica Plain. By late September, the maples along Meadow Road show early orange and red. Free and open from dawn to dusk. The Hunnewell Building has maps and seasonal guides.
Jamaica PlainBoston Common and Public Garden
parkThe 20-hectare Common, established in 1634, is the oldest public park in the United States. The adjacent Public Garden features the Swan Boats (which end their season in mid-September) and 4 hectares of maintained flower beds. The weeping willows along the pond are still green in September.
DowntownBeacon Hill
neighborhoodGas-lit streets, brick row houses, and narrow cobblestone lanes. Charles Street at the base of the hill has independent bookshops, antique stores, and cafes. Acorn Street, possibly the most photographed street in New England, is 2 blocks uphill. September's mild weather makes the steep walking comfortable.
Beacon HillFaneuil Hall and Quincy Market
historicFaneuil Hall, built in 1742, sits at the midpoint of the Freedom Trail. Quincy Market behind it houses food stalls and restaurants in a granite building from 1826. Post-Labor Day, the crowds thin enough to actually browse without shoulder-to-shoulder congestion.
DowntownSeaport District and the Harborwalk
waterfrontBoston's newest neighborhood, built on reclaimed waterfront, has restaurants, the ICA (Institute of Contemporary Art), and a 70-km waterfront walking path. September evenings along the Harborwalk, with the sun setting behind the Financial District, tend to feel peaceful once the summer crowds leave.
SeaportNorth End
neighborhoodBoston's Italian neighborhood since the early 1900s. Hanover Street is lined with restaurants, bakeries, and cafes. Mike's Pastry and Modern Pastry on the same block have been competing for cannoli supremacy for decades. September evenings are still warm enough for outdoor tables along the narrow streets.
North EndMuseum of Fine Arts
museumThe MFA holds over 500,000 works, with strong collections in American art, Egyptian antiquities, and Impressionism. The building on Huntington Avenue opened in 1909 and expanded several times since. September's fall exhibition openings typically bring new installations. Wednesday evenings after 4 PM offer reduced-rate entry.
FenwayCharles River Esplanade
parkA 5-km park along the Boston bank of the Charles River, stretching from the Museum of Science to the BU Bridge. The Hatch Shell, where the Boston Pops play in July, sits about midway. September mornings bring rowers, joggers, and dog walkers. The footbridges to the lagoons offer quiet spots away from Storrow Drive traffic.
Back Bay
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Insider tips
The MBTA's CharlieCard (reloadable plastic) costs less per ride than the paper CharlieTicket. You can get one from machines at any subway station. The difference per ride is small, but it adds up over a week of daily T rides between Back Bay, Harvard Square, and the waterfront.
September 1 is known locally as 'Allston Christmas.' Departing students leave furniture, kitchenware, and electronics on the curb in Allston and Brighton. It's chaotic, but the sidewalks become an impromptu flea market. Worth a walk-through if you're curious, but avoid driving in those neighborhoods that week.
The Rose Kennedy Greenway, the 6-hectare linear park downtown, hosts rotating food trucks on weekdays during lunch. The lineup changes daily and tends to include local operators rather than chains. Check the Greenway's website for the day's schedule.
If you want to see rowing on the Charles, walk the Cambridge side of the river between the Weeks Footbridge and the Eliot Bridge any weekday morning before 8 AM. September is when crews ramp up training for the Head of the Charles in October. The sound of coxswains calling through megaphones across the water is distinctive.
The Copley Square Farmers Market on Tuesdays and Fridays runs through November. By September, the tables are full of late-summer tomatoes, early apples, local honey, and fresh herbs. It's a good spot to pick up lunch provisions before walking through the South End.
For a quieter alternative to the Freedom Trail crowds, walk the Black Heritage Trail on Beacon Hill. The 2.5-km self-guided route passes 14 sites related to Boston's 19th-century Black community, including the African Meeting House from 1806. It rarely draws tour-bus groups.
Avoid these mistakes
- Booking a hotel in Allston or Brighton during the first week of September without realizing it's university move-in week. The neighborhood is gridlocked with trucks, and the noise level from orientation events runs late into the evening.
- Assuming the harbor islands ferry runs on its summer schedule after Labor Day. Departures drop significantly in September, and missing the last return ferry means an expensive water taxi or an unplanned night on Georges Island.
- Packing only shorts and T-shirts. September mornings near 15°C and evening harbor breezes below that catch visitors off guard, especially those arriving from warmer climates who equate 'still summer' with warm evenings.
- Skipping the Isabella Stewart Gardner Museum because you've already seen the MFA. They're completely different experiences. The Gardner's intimate courtyard and the unresolved 1990 art heist give it a character no encyclopedic museum can match.
- Driving in the city. Boston's one-way street grid, rotaries, and aggressive local driving style make it one of the hardest cities in the US to navigate by car. The MBTA subway covers most tourist destinations, and ride-shares fill the gaps. Parking alone can run well above what you'd spend on a week of transit passes.
Practical tips for September
Book hotels at least 3 to 4 weeks ahead for the first half of September, when university move-in and conference season tighten availability across Back Bay, the Seaport, and Cambridge. Rates tend to ease slightly in the second half of the month. The MBTA subway (the T) runs 4 main lines and covers most visitor destinations, though service ends around 12:30 AM. Carry a light rain layer daily. September rain tends to arrive in short, heavy bursts rather than all-day drizzle, so you can usually wait out a shower under an awning for 20 minutes and carry on. Restaurant reservations in the South End and North End are easier to get than in summer, but popular spots like Neptune Oyster and Myers + Chang still fill up. Book 2 to 3 days ahead for weekend dinners. Sunset drops from 7:10 PM to 6:25 PM through the month, so plan outdoor activities for earlier in the day as September progresses.
FAQ
Is September a good time to visit Boston?
September is one of the 2 best months to visit Boston, alongside October. Temperatures average 15°C to 23°C, summer crowds thin after Labor Day, and the cultural season restarts with the BSO, Boston Ballet, and fall exhibitions at the city's museums. The main tradeoff is pricing, which stays 20-35% above the annual average for hotels.
What is the weather like in Boston in September?
Expect highs around 23°C (73°F) and lows near 15°C (58°F), with the first week still feeling like late summer and the final week hinting at autumn. Rain averages 129mm over about 10 days, arriving in bursts rather than steady drizzle. Humidity is moderate at 77%, a noticeable drop from August's thicker air.
What should I pack for Boston in September?
Layers are essential. Bring a T-shirt for midday warmth, a long-sleeve shirt or sweater for mornings and evenings, a packable rain jacket, and closed-toe walking shoes with tread for Beacon Hill's brick and cobblestone sidewalks. Skip the heavy coat, but one warmer layer handles late-month evenings that can drop below 12°C.
Are the fall colors visible in Boston in September?
Early color appears in the last week of September, mostly in maples at Arnold Arboretum and along the Emerald Necklace. The full peak foliage display typically arrives in mid to late October. September gives you a preview without the October hotel premium and leaf-peeper crowds.
Is it worth visiting the Boston Harbor Islands in September?
Yes, but check the ferry schedule first. After Labor Day, departures from Long Wharf drop from hourly to every 2 to 3 hours. Georges Island and Spectacle Island are both worth the 45-minute ferry ride, and September's thinner crowds mean you might have stretches of beach to yourself on a weekday.
How crowded is Boston in September?
Medium. The first week is hectic in college neighborhoods due to university move-in, with roughly 250,000 students returning. Tourist sites like the Freedom Trail, the Aquarium, and Faneuil Hall are noticeably less packed after Labor Day compared to July and August. By mid-September, the city settles into a comfortable rhythm between summer peak and winter quiet.
Things to Do in Boston in September
Free cancellation Boston Duck Boat Sightseeing City Tour with Cruise
Cruise — 1.3 hours, free cancellation.
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Free cancellation Harvard University Campus Guided Walking Tour
City tour — 1.2 hours, free cancellation.
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Free cancellation City Cruises Boston Whale Watching Cruise by High-Speed Boat
Cruise — 3.5 hours, free cancellation.
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Free cancellation Boston to Martha's Vineyard Day Trip with Optional Island Tour
Day trip — 12 hours, free cancellation.
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Free cancellation 1 or 2 Day HOP-ON & HOP-OFF Narrated Trolley Tour of Boston
City tour — 1.3 hours, free cancellation.
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Free cancellation Boston Freedom Trail Walking Tour with Costumed Guide
City tour — 1.8 hours, free cancellation.
via ViatorLast verified by automated review (v1.7.2) on June 13, 2026. What is automated review?