Arizona (Phoenix)
September
Weather in Arizona for September 2026
Your guide to Arizona weather in September - trends and predictions
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Until now, September 2026 in Arizona is slightly cooler than the historical average by 1.6 °F.
The forecast for the coming days of September 2026 predicts a temperature of 31.3 °F , which is warmer than usual.
In general, the average temperature in Arizona at the beginning of September is 40.1 °F. As the month progressed, temperatures tended to significantly cool down, reaching an average of 34.6 °F by the end of September.
With an average of 3 rainy days, Arizona experiences minimal rainfall in September.
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Temperatures
Rain 🌧️
More
27
Dry days
3
Rainy days
0
Snow days
38°/27°
Temperatures
17 km/h
Avg max wind
28 %
Avg humidity
Arizona Weather September
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What’s the Weather Like in Arizona This September?
Discover the average temperatures and weather trends across Arizona’s cities this September.
Temperatures trend during September in Arizona
See the weather trend as well as the moving average line
September weather in Arizona 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 | Sunny | 40° /28° | 1.5 mm | 9 | |
| Sept. 11 | Sunny | 40° /29° | 0.5 mm | 9 | |
| Sept. 12 | Sunny | 38° /28° | 0.9 mm | 9 | |
| Sept. 13 | Sunny | 38° /27° | 2.3 mm | 9 | |
| Sept. 14 | Sunny | 38° /26° | 0.2 mm | 9 | |
| Sept. 15 | Sunny | 38° /26° | 1.6 mm | 8 | |
| Sept. 16 | Sunny | 38° /25° | 5.9 mm | 8 | |
| Sept. 17 | Sunny | 36° /25° | 0.5 mm | 8 | |
| Sept. 18 | Sunny | 37° /25° | 0.1 mm | 8 | |
| Sept. 19 | Sunny | 38° /25° | 0 mm | 9 | |
| Sept. 20 | Sunny | 37° /25° | 0 mm | 8 | |
| Sept. 21 | Sunny | 35° /24° | 1.8 mm | 8 | |
| Sept. 22 | Sunny | 36° /24° | 1.8 mm | 8 | |
| Sept. 23 | Sunny | 38° /25° | 0.2 mm | 8 | |
| Sept. 24 | Sunny | 37° /24° | 4.1 mm | 8 | |
| Sept. 25 | Sunny | 38° /24° | 0.1 mm | 9 | |
| Sept. 26 | Sunny | 37° /25° | 4.5 mm | 8 | |
| Sept. 27 | Sunny | 37° /25° | 0.5 mm | 7 | |
| Sept. 28 | Sunny | 36° /24° | 5.3 mm | 7 | |
| Sept. 29 |  Light rain shower | 27° /20° | 10.1 mm | 7.1 | |
| Sept. 30 | Sunny | 30° /22° | 0 mm | 6.9 | |
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Important Notice
Our weather forecast for Arizona 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 Arizona forecast closer to your planned date for the most up-to-date weather information.
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Arizona in September - FAQ
What are the expected maximum and minimum temperatures in Arizona during September?
With daytime temperatures soaring above 38° and not dropping much below 27° at night, September in Arizona is quite hot. Staying hydrated and avoiding peak sun hours is advisable.
How much rainfall should be expected in Arizona during September?
In September, Arizona 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 Arizona during September?
The average wind speed in Arizona during September is 17 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Arizona
Explore the daily rainfall trends and prepare for Arizonas September weather 💧
Typically, Arizona has 3 rainy days in September with a total of 27.7 mm of rainfall.
UV exposure in Arizona during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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