Pima County (Tucson)
September
Weather in Pima County, Arizona for September 2025
Your guide to Pima County weather in September - trends and predictions
Until now, September 2025 in Pima County is cooler than usual, with temperatures averaging 33.5 °F, this is -2.5 °F below the typical seasonal average.
The forecast for the next days in Pima County predicts temperatures to be around 35 °F, close to the historical average.
In general, the average temperature in Pima County at the beginning of September is 35.3 °F. As the month progressed, temperatures tended to moderately rise, reaching an average of 36 °F by the end of September.
With an average of 4 rainy days, Pima County experiences minimal rainfall in September.
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Temperatures
Rain 🌧️
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26
Dry days
4
Rainy days
0
Snow days
36°/20°
Temperatures
21 km/h
Avg max wind
30 %
Avg humidity
Pima County Weather September
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Temperatures trend during September in Pima County
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September weather in Pima County day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 |  Thundery outbreaks possible | 35° /22° | 0.4 mm | 8 | |
| Sept. 2 |  Patchy rain possible | 35° /22° | 0.5 mm | 8 | |
| Sept. 3 |  Sunny | 36° /21° | 0 mm | 9 | |
| Sept. 4 | Sunny | 35° /22° | 2.2 mm | 8 | |
| Sept. 5 | Sunny | 33° /20° | 23.2 mm | 8 | |
| Sept. 6 | Sunny | 36° /21° | 2.1 mm | 9 | |
| Sept. 7 | Sunny | 37° /22° | 0 mm | 9 | |
| Sept. 8 | Sunny | 37° /22° | 0 mm | 9 | |
| Sept. 9 | Sunny | 39° /22° | 0 mm | 9 | |
| Sept. 10 | Sunny | 39° /22° | 0 mm | 9 | |
| Sept. 11 |  Cloudy | 37° /23° | 0.2 mm | 8 | |
| Sept. 12 | Thundery outbreaks possible | 35° /23° | 2.2 mm | 8 | |
| Sept. 13 |  Moderate or heavy rain shower | 34° /22° | 1.5 mm | 8 | |
| Sept. 14 | Sunny | 35° /20° | 0.9 mm | 8 | |
| Sept. 15 | Sunny | 39° /21° | 0 mm | 2.2 | |
| Sept. 16 | Sunny | 37° /22° | 0 mm | 2.1 | |
| Sept. 17 | Sunny | 37° /23° | 0 mm | 1.8 | |
| Sept. 18 | Patchy rain possible | 34° /25° | 0.6 mm | 1.9 | |
| Sept. 19 | Patchy rain possible | 35° /27° | 0.6 mm | 0 | |
| Sept. 20 | Sunny | 35° /27° | 0.1 mm | 8 | |
| Sept. 21 | Sunny | 36° /28° | 0.1 mm | 8 | |
| Sept. 22 | Patchy rain possible | 35° /28° | 0.5 mm | 7 | |
| Sept. 23 | Patchy rain possible | 33° /26° | 0.8 mm | 6 | |
| Sept. 24 | Sunny | 34° /23° | 0 mm | 7 | |
| Sept. 25 | Sunny | 35° /25° | 0 mm | 7 | |
| Sept. 26 | Sunny | 36° /26° | 0 mm | 8 | |
| Sept. 27 | Sunny | 36° /26° | 0 mm | 8 | |
| Sept. 28 | Sunny | 34° /25° | 0 mm | 7 | |
| Sept. 29 | Sunny | 39° /18° | 0 mm | 9 | |
| Sept. 30 | Sunny | 38° /16° | 0 mm | 9 | |
| Next | |||||
Important Notice
Our weather forecast for Pima County 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 Pima County forecast closer to your planned date for the most up-to-date weather information.
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Pima County in September - FAQ
What are the expected maximum and minimum temperatures in Pima County during September?
Expect warm days with temperatures around 36°, cooling to mild conditions of 20° after sunset. Perfect for those who enjoy warm weather.
How much rainfall should be expected in Pima County during September?
Expect minimal rainfall in Pima County during September, with a total of 11.1 mm over approximately 4 days. This minimal precipitation is unlikely to significantly impact plans.
What are the typical wind conditions in Pima County during September?
The average wind speed in Pima County during September is 21 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Pima County
Explore the daily rainfall trends and prepare for Pima Countys September weather 💧
UV exposure in Pima County during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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