What August feels like in Phoenix
In Phoenix, August brings late summer. The heat peaks hard in the afternoon, when being outside for long is draining. Even after dark it stays hot and sultry. Dry air means sweat evaporates quickly — it feels less sticky, but you lose water fast.
Rain in Phoenix in August
Most days stay dry; rain arrives about one day in 8. Wet days average about 7.4 mm (0.3 in), enough to soak you without an umbrella. Across the year Phoenix averages about 8 mm per rainy day, so August is typical.
Daylight and sunshine in August
Mid-month, Phoenix gets 13 h 26 min of daylight, from sunrise near 5:50 am to sunset near 7:16 pm. Evenings are drawing in — 45 min less daylight than mid-July. About 92% of daylight hours are sunny; in short, skies are mostly clear.
How August compares to the rest of the year
August is the 3rd warmest month of the year in Phoenix. Against July, the average high is 0.9°C (1.6°F) lower, with 5 mm less rain. Temperatures keep falling into September. By September, typical highs are 37.3°C (99.1°F).
Who August suits
- Sightseeing: less ideal — midday heat makes long walks hard.
- Parks & outdoor: less ideal — afternoons are too warm to linger outside.
- Museums & indoor: a good choice — a cool break during the hottest hours.
Tips for visiting Phoenix in August
Sun Protection
Loose, breathable clothing plus sunscreen and a wide-brimmed hat.
Quick questions
How warm is Phoenix in August?
Expect around 40°C (104°F) in the afternoon and 28.1°C (82.6°F) at night, which most visitors would call very hot.
Does it rain a lot in Phoenix in August?
Only moderately: roughly 4 wet days and 30 mm, usually moderate rain.
What should I wear in Phoenix in August?
Based on the averages: sun protection. Evenings feel similar to the day, so the same clothes work from morning to night.
Is August or September better for visiting Phoenix?
September, narrowly: it ranks #10 of 12 among Phoenix's months, against #11 for the other. September is cooler and has fewer rainy days.