Phoenix in August
In August, Phoenix averages 40°C (103°F) during the day and 28°C (82°F) at night, with around 10 days of rain (39 mm total).
Off-peakConditions are very hot — early-morning and evening sightseeing recommended. Plan for unsettled weather and bring rain gear.
It's peak hurricane season in Phoenix during August. Travel is possible but expect storm risk, possible flight disruption, and generally lower travel insurance coverage.
How August compares to the rest of the year in Phoenix
August is one of the warmest months in Phoenix (3rd of 12) and one of the wettest months (2nd of 12). Daytime temperature runs 9°C above the annual average (30°C). August runs 1°C cooler than July (41°C) and cools 3°C in September (37°C).
August sunrise & sunset in Phoenix
Times shown for Phoenix local time (America/Phoenix), calculated for the 15th of August. They shift by a few minutes day to day across the month.
Photography light in Phoenix — August
Golden-hour and blue-hour windows for the 15th of August, in Phoenix's local time. Use these for soft warm light (golden) or cool architectural twilight (blue).
📅 When to book — Phoenix in August
Travel writers usually only tell you when to go. Here's when to book flights and lodging for the best mix of price and availability, based on August's tier (Off-peak) and Phoenix's popularity.
Crowds & pricing — August in Phoenix
This is off-peak for Phoenix — the lowest prices of the year and the fewest crowds, but with real trade-offs: some restaurants, hotels, and beach businesses may close for the season; weather conditions can make outdoor activities unpredictable; and a handful of seasonal sights run reduced hours or close entirely. Great if you prefer a quiet local rhythm and don't mind the climate giving you reasons to choose indoor activities.
Why this tier: challenging tourism weather Northern Hemisphere summer holidays peak hazard season (1 active)
Sun & mosquito risk — August in Phoenix
UV is a clear-sky sea-level estimate — clouds, altitude, and reflective surfaces (snow, water) shift it ±30%. Mosquito risk is climate-derived only; for current disease advisories (dengue, malaria, zika) check the CDC or WHO travel pages before your trip.
Phoenix in other months
| Month | Avg high | Avg low | Rainfall | Rain days | Snow days |
|---|---|---|---|---|---|
| January | 19°C / 66°F | 6°C / 42°F | 27 mm | 6 | — |
| February | 22°C / 71°F | 7°C / 45°F | 29 mm | 5 | — |
| March | 26°C / 78°F | 11°C / 51°F | 22 mm | 4 | — |
| April | 31°C / 87°F | 15°C / 60°F | 3 mm | 2 | — |
| May | 34°C / 94°F | 20°C / 67°F | 3 mm | 2 | — |
| June | 41°C / 105°F | 26°C / 78°F | 5 mm | 2 | — |
| July | 41°C / 105°F | 29°C / 84°F | 52 mm | 11 | — |
| August | 40°C / 103°F | 28°C / 82°F | 39 mm | 10 | — |
| September | 37°C / 98°F | 24°C / 76°F | 32 mm | 7 | — |
| October | 31°C / 88°F | 17°C / 63°F | 24 mm | 4 | — |
| November | 25°C / 76°F | 11°C / 51°F | 15 mm | 3 | — |
| December | 19°C / 65°F | 6°C / 43°F | 39 mm | 7 | — |
Other cities with similar August weather
🌍 See the full ranked list of climate twins for Phoenix in August →
Frequently asked questions
How hot is Phoenix in August?
In August, Phoenix averages a high of 40°C (103°F) and a low of 28°C (82°F) — generally hot.
Does it rain a lot in Phoenix in August?
August can be fairly wet in Phoenix, with about 10 rainy days on average.
Is August a good time to visit Phoenix?
August is hot. It suits travelers who are comfortable with hot weather; check the month-by-month ranking to compare it against the rest of the year.
What should I pack for Phoenix in August?
Pack lightweight, breathable clothing, sunglasses and sunscreen, plus a compact umbrella or rain jacket. See the full August packing list for Phoenix for a complete, climate-based checklist.
Check the live 10-day forecast and sunrise/sunset.