Phoenix
August
Weather in Phoenix for August 2025
Your guide to Phoenix weather in August - trends and predictions
In general, the average temperature in Phoenix at the beginning of August is 42.7 °F. As the month progressed, temperatures tended to remain steady, reaching an average of 42.7 °F by the end of August.
The climate of Phoenix in August is notably wet, with an average of 11 rainy days.
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20
Dry days
11
Rainy days
0
Snow days
42°/29°
Temperatures
20 km/h
Avg max wind
28 %
Avg humidity
Phoenix in August average weather
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| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  40° | 2  43° | 3  44° | ||||
| 4 44° | 5 44° | 6 43° | 7 41° | 8  41° | 9 41° | 10 42° |
| 11  40° | 12  40° | 13 40° | 14 42° | 15 42° | 16  43° | 17 42° |
| 18 40° | 19 39° | 20 40° | 21 37° | 22 39° | 23 39° | 24 40° |
| 25 42° | 26 43° | 27 42° | 28 43° | 29 44° | 30 44° | 31  41° |
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Temperatures trend during August in Phoenix
See the weather trend as well as the moving average line
August weather day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Aug. 1 | Partly cloudy | 40° /28° | 0.6 mm | 9 | |
| Aug. 2 | Cloudy | 43° /31° | 0.5 mm | 9 | |
| Aug. 3 | Sunny | 44° /32° | 0 mm | 10 | |
| Aug. 4 | Sunny | 44° /31° | 0.4 mm | 11 | |
| Aug. 5 | Sunny | 44° /31° | 0.5 mm | 11 | |
| Aug. 6 | Sunny | 43° /30° | 1.6 mm | 11 | |
| Aug. 7 | Partly cloudy | 41° /30° | 0.7 mm | 9 | |
| Aug. 8 | Patchy rain possible | 41° /30° | 1 mm | 9 | |
| Aug. 9 | Patchy rain possible | 41° /31° | 0.8 mm | 9 | |
| Aug. 10 | Patchy rain possible | 42° /31° | 0.1 mm | 10 | |
| Aug. 11 | Moderate rain at times | 40° /30° | 1.9 mm | 9 | |
| Aug. 12 | Overcast | 40° /29° | 1.2 mm | 9 | |
| Aug. 13 | Sunny | 40° /29° | 0.7 mm | 9 | |
| Aug. 14 | Partly cloudy | 42° /31° | 0 mm | 10 | |
| Aug. 15 | Partly cloudy | 42° /31° | 0 mm | 10 | |
| Aug. 16 | Heavy rain at times | 43° /32° | 0.9 mm | 10 | |
| Aug. 17 | Moderate or heavy rain shower | 42° /32° | 1.5 mm | 10 | |
| Aug. 18 | Heavy rain at times | 40° /31° | 2.9 mm | 9 | |
| Aug. 19 | Overcast | 39° /30° | 0.5 mm | 9 | |
| Aug. 20 | Patchy rain possible | 40° /31° | 0.4 mm | 9 | |
| Aug. 21 | Moderate rain at times | 37° /27° | 5.1 mm | 8 | |
| Aug. 22 | Partly cloudy | 39° /27° | 2.7 mm | 9 | |
| Aug. 23 | Partly cloudy | 39° /29° | 0.2 mm | 9 | |
| Aug. 24 | Cloudy | 40° /28° | 0 mm | 9 | |
| Aug. 25 | Sunny | 42° /30° | 0.1 mm | 10 | |
| Aug. 26 | Sunny | 43° /31° | 0 mm | 11 | |
| Aug. 27 | Sunny | 42° /31° | 0.3 mm | 10 | |
| Aug. 28 | Sunny | 43° /31° | 0 mm | 10 | |
| Aug. 29 | Sunny | 44° /30° | 0 mm | 11 | |
| Aug. 30 | Sunny | 44° /31° | 0.1 mm | 10 | |
| Aug. 31 | Thundery outbreaks possible | 41° /30° | 0.2 mm | 9 | |
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Important Notice
Our weather forecast for Phoenix in August is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Phoenix forecast closer to your planned date for the most up-to-date weather information.
Phoenix in August - FAQ
What are the expected maximum and minimum temperatures in Phoenix during August?
With daytime temperatures soaring above 42° and not dropping much below 29° at night, August in Phoenix is quite hot. Staying hydrated and avoiding peak sun hours is advisable.
How much rainfall should be expected in Phoenix during August?
In August, Phoenix can expect light to moderate rainfall, totaling 22.4 mm across approximately 11 days. Occasional showers are possible, and planning ahead for them could be helpful.
What are the typical wind conditions in Phoenix during August?
The average wind speed in Phoenix during August is 20 km/h, suggesting breezy to windy conditions, depending on your activities.
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