Avg High
Phoenix in August
Verdict
In Phoenix, August has a distinct summer feel. As the season moves along, the air is cooling down. You can usually expect a hot month that feels reliable day to day. Breezes can be part of the character, especially in exposed spots.
It suits travellers who want straightforward weather for sightseeing and day trips. Shade breaks make a noticeable difference on longer outdoor days.
Avg Low
Rain
Daylight
13h
What to expect
- Temperature feel - Intense heat where evenings can feel like a different season. Direct sun can push it into “hotter than expected” territory.
- Wet weather - Changeable skies. It’s often more stop-start than all-day. It’s worth being prepared for occasional rain.
- Midday sun - Very high UV is common. Outdoor time is best in the morning or late afternoon. It's the kind of sun you notice immediately.
- Exposure - Refreshing breezes, and gusts can catch you in exposed spots. Sheltered streets can feel fine, but open areas feel very different.
August in context
How it compares to the rest of the year in Phoenix.
Hottest (avg)
#3 / 12
Wettest (avg)
#5 / 12
Daylight Hours
#4 / 12
Windiest (avg)
#9 / 12
Highest UV
#4 / 12
Most Humid
#6 / 12
Temperature
- Daytime high
-
- Nighttime low
-
- Feels like (avg)
-
Sunshine
- Daylight
- 13.3 hours
- UV index (max)
- 9
- Typical sun hours
- 05:50 – 19:11
Rain & Snow
- Total
-
- Rainy days
- 7
- Cloud cover
- 33%
- Snowfall
-
Humidity & Wind
- Humidity (avg)
- 34%
- Wind (avg)
-
- Wind (max gusts)
-
Frequently asked questions
Is August a good time to visit Phoenix?
Typical August days in Phoenix reach highs of 40°C (104°F) with nights around 28°C (82°F). It usually feels very hot by day and warm after dark. Overall, August sits in the middle of the Phoenix climate range.
What are temperatures like in August?
In August, you can usually expect highs of 40°C (104°F) and lows near 28°C (82°F). That means very hot days and warm nights, so pack layers you can add or remove.
How much does it rain in August?
Rainfall in August averages 26 mm (1.0 in) across roughly 7 days. Overall it is a moderately wet time of year, so showers are usually brief rather than all-day downpours.
How many hours of daylight are there in August?
You can expect about 13 hours of daylight in August. Sunrise is typically around 05:50 and sunset near 19:11. You get long days with comfortable amounts of daylight.
How strong is the sun in August?
UV levels frequently reach very high levels (around 9), so strong sun protection is essential, especially around midday.
Is it windy in August?
In August, average wind speeds are around 8 km/h (5 mph), with gusts on the windiest days reaching about 41 km/h (25 mph). On the ground, it is it often feels breezy, especially in more exposed spots or along the coast.