What should I pack for Phoenix?

The single most important thing to pack for Phoenix is a refillable insulated water bottle. This sounds like generic advice until you step off the jetway at Sky Harbor International Airport in June and feel 40°C air hit your face like opening an oven door. The heat here behaves differently than in Houston or Miami. Your sweat evaporates before you notice it, which means dehydration creeps up within 30 minutes of outdoor exposure. The Heard Museum on Central Avenue keeps its galleries at a cool 21°C, but the 5-minute walk from the parking lot will leave your lips cracked and your throat raw if you haven't been sipping water all morning. Carry at least 1 liter per person for any outdoor stretch longer than 20 minutes. The Desert Botanical Garden in Papago Park has water stations along its trails, but they run warm by 10 a.m.

Clothing in Phoenix comes down to sun protection, not modesty or dress codes. Lightweight UPF 50+ long-sleeve shirts beat sunscreen alone on a 3-hour walk through the Phoenix Zoo, where the Africa Trail section offers limited canopy shade. Cotton performs fine at 17% humidity because your sweat actually evaporates, so skip the expensive moisture-wicking tech fabrics you'd bring to Bangkok or Houston. Light-colored clothes make a measurable difference when downtown Phoenix asphalt hits 70°C by 2 p.m. in summer. That pavement heat radiates upward, which is why closed-toe shoes with thick soles matter more here than in most American cities. Sandals on the Roosevelt Row sidewalks at midday feel like stepping onto a heated griddle. Pack a wide-brim hat, not a baseball cap. Caps leave your ears and neck exposed to UV index readings of 11+, the level Phoenix holds from April through September.

Sunscreen needs to be SPF 50 or higher, and you'll reapply every 90 minutes outdoors, not the 2 hours the bottle suggests. The dry air means you won't feel the burn building the way you would at a Florida beach. Visitors routinely get second-degree sunburns on their first Phoenix trip because 17% humidity creates a false sense of comfort. Bring lip balm with SPF 15 or higher. Your lips will split within 48 hours without it. Pack saline nasal spray or a small tube of petroleum jelly for your nostrils. The desert air dries out nasal passages overnight, and waking up at your Scottsdale hotel with a nosebleed at 3 a.m. is a common first-timer surprise. A portable battery pack is worth the suitcase weight too. Temperatures above 38°C cause phone batteries to drain 2-3 times faster than normal, and your Google Maps app is the difference between finding the Camelback Mountain trailhead parking lot and driving in circles through Paradise Valley.

Skip packing heavy moisturizer, aloe vera gel, and cases of bottled water. A 16-ounce bottle of aloe at any Walgreens or CVS in the Phoenix metro runs $6-8, roughly half New York pharmacy prices. Fry's Food Stores sell 24-packs of water for about $3.50, compared to $4 per single bottle from Sky Harbor vending machines. Sunglasses are worth bringing from home, though. The $10 gas-station pairs along I-10 tend to lack proper UV400 protection, and the midday glare off Camelback Road will give you a headache through anything less. One thing first-time Phoenix visitors forget is a small microfiber towel. The Phoenix Art Museum and the Heard Museum both run air conditioning around 18°C, and walking from 41°C outside into that chill while damp with sweat gives you an immediate full-body shiver. A quick wipe-down before entering saves 20 minutes of teeth-chattering discomfort in the galleries.