Phoenix (AZ)
September
Weather in Phoenix, Arizona for September 2026
Your guide to Phoenix weather in September - trends and predictions
Extreme Heat Warning - See hour by hour.
So far, September 2026 in Phoenix is slightly warmer than the historical average by 0.8 °F.
Expect cooler weather in the next days in Phoenix with the forecast suggesting a temperature of 37.5 °F, lower than the historical average.
In general, the average temperature in Phoenix at the beginning of September is 40.1 °F. As the month progressed, temperatures tended to moderately fall, reaching an average of 38.1 °F by the end of September.
With an average of 3 rainy days, Phoenix experiences minimal rainfall in September.
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Temperatures
Rain 🌧️
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27
Dry days
3
Rainy days
0
Snow days
38°/27°
Temperatures
17 km/h
Avg max wind
28 %
Avg humidity
Phoenix Weather September
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Temperatures trend during September in Phoenix
See the weather trend as well as the moving average line
September weather in Phoenix day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 |  Sunny | 39° /27° | 7.8 mm | 9 | |
| Sept. 2 | Sunny | 39° /28° | 1.1 mm | 9 | |
| Sept. 3 | Sunny | 40° /28° | 6.9 mm | 10 | |
| Sept. 4 | Sunny | 40° /29° | 0.7 mm | 9 | |
| Sept. 5 | Sunny | 40° /28° | 0 mm | 9 | |
| Sept. 6 | Sunny | 41° /28° | 0 mm | 9 | |
| Sept. 7 | Sunny | 42° /28° | 0 mm | 10 | |
| Sept. 8 | Sunny | 41° /29° | 0 mm | 10 | |
| Sept. 9 | Sunny | 41° /28° | 0.4 mm | 10 | |
| Sept. 10 |  Dust haze | 42° /30° | 0 mm | 9.1 | |
| Sept. 11 | Dust haze | 38° /31° | 0.4 mm | 9 | |
| Sept. 12 |  Patchy rain possible | 37° /29° | 4.1 mm | 9.2 | |
| Sept. 13 | Sunny | 38° /30° | 0 mm | 9.1 | |
| Sept. 14 | Sunny | 38° /29° | 1.4 mm | 9 | |
| Sept. 15 | Patchy rain possible | 34° /26° | 3 mm | 8 | |
| Sept. 16 | Patchy rain possible | 36° /29° | 4.8 mm | 9 | |
| Sept. 17 |  Overcast | 38° /29° | 0.1 mm | 9 | |
| Sept. 18 | Sunny | 40° /31° | 0 mm | 9 | |
| Sept. 19 | Sunny | 40° /31° | 0.2 mm | 10 | |
| Sept. 20 | Patchy rain possible | 36° /26° | 4.5 mm | 9 | |
| Sept. 21 | Sunny | 34° /26° | 10 mm | 8 | |
| Sept. 22 | Sunny | 37° /30° | 0 mm | 9 | |
| Sept. 23 | Sunny | 37° /30° | 2.4 mm | 9 | |
| Sept. 24 | Sunny | 39° /24° | 0 mm | 9 | |
| Sept. 25 | Sunny | 40° /25° | 0 mm | 10 | |
| Sept. 26 | Sunny | 38° /25° | 5.5 mm | 9 | |
| Sept. 27 | Sunny | 38° /24° | 0.1 mm | 9 | |
| Sept. 28 | Sunny | 38° /24° | 0.4 mm | 8 | |
| Sept. 29 | Sunny | 37° /24° | 0 mm | 9 | |
| Sept. 30 | Sunny | 37° /23° | 0 mm | 9 | |
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Important Notice
Our weather forecast for Phoenix in September 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.
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Phoenix in September - FAQ
What are the expected maximum and minimum temperatures in Phoenix during September?
With daytime temperatures soaring above 38° and not dropping much below 27° at night, September in Phoenix is quite hot. Staying hydrated and avoiding peak sun hours is advisable.
How much rainfall should be expected in Phoenix during September?
In September, Phoenix can expect light to moderate rainfall, totaling 27.7 mm across approximately 3 days. Occasional showers are possible, and planning ahead for them could be helpful.
What are the typical wind conditions in Phoenix during September?
The average wind speed in Phoenix during September is 17 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Phoenix
Explore the daily rainfall trends and prepare for Phoenixs September weather 💧
Typically, Phoenix has 3 rainy days in September with a total of 27.7 mm of rainfall.
UV exposure in Phoenix during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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