Pima County (Tucson)
September
Weather in Pima County for September 2025
Your guide to Pima County weather in September - trends and predictions
In general, the average temperature in Pima County at the beginning of September is 36.4 °F. As the month progressed, temperatures tended to noticeably warm up, reaching an average of 38.6 °F by the end of September.
With an average of 4 rainy days, Pima County experiences minimal rainfall in September.
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26
Dry days
4
Rainy days
0
Snow days
38°/19°
Temperatures
22 km/h
Avg max wind
28 %
Avg humidity
Pima County in September average weather
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| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  34° | 2  35° | 3  36° | 4 37° | 5 38° | 6 38° | 7  37° |
| 8 37° | 9 39° | 10 40° | 11  38° | 12 35° | 13  35° | 14 35° |
| 15 35° | 16 35° | 17 36° | 18 35° | 19 35° | 20  34° | 21 33° |
| 22 34° | 23 36° | 24 36° | 25 39° | 26 40° | 27 40° | 28 38° |
| 29 39° | 30 38° |
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Temperatures trend during September in Pima County
See the weather trend as well as the moving average line
September weather day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 | Thundery outbreaks possible | 34° /22° | 0.6 mm | 8 | |
| Sept. 2 | Patchy rain possible | 35° /21° | 0.8 mm | 8 | |
| Sept. 3 | Sunny | 36° /22° | 0 mm | 9 | |
| Sept. 4 | Sunny | 37° /22° | 0 mm | 9 | |
| Sept. 5 | Sunny | 38° /21° | 0 mm | 9 | |
| Sept. 6 | Sunny | 38° /22° | 0 mm | 10 | |
| Sept. 7 | Partly cloudy | 37° /23° | 0 mm | 9 | |
| Sept. 8 | Sunny | 37° /23° | 0 mm | 9 | |
| Sept. 9 | Sunny | 39° /23° | 0 mm | 10 | |
| Sept. 10 | Partly cloudy | 40° /23° | 0 mm | 10 | |
| Sept. 11 | Cloudy | 38° /24° | 0.2 mm | 9 | |
| Sept. 12 | Thundery outbreaks possible | 35° /23° | 0 mm | 9 | |
| Sept. 13 | Moderate or heavy rain shower | 35° /22° | 2.3 mm | 8 | |
| Sept. 14 | Sunny | 35° /21° | 1.3 mm | 8 | |
| Sept. 15 | Sunny | 35° /20° | 1.9 mm | 8 | |
| Sept. 16 | Sunny | 35° /19° | 3.9 mm | 8 | |
| Sept. 17 | Partly cloudy | 36° /18° | 0 mm | 8 | |
| Sept. 18 | Sunny | 35° /17° | 0 mm | 9 | |
| Sept. 19 | Sunny | 35° /15° | 0 mm | 9 | |
| Sept. 20 | Overcast | 34° /15° | 0 mm | 8 | |
| Sept. 21 | Sunny | 33° /14° | 0 mm | 8 | |
| Sept. 22 | Partly cloudy | 34° /13° | 0 mm | 8 | |
| Sept. 23 | Sunny | 36° /15° | 0 mm | 9 | |
| Sept. 24 | Sunny | 36° /16° | 0 mm | 9 | |
| Sept. 25 | Sunny | 39° /18° | 0 mm | 9 | |
| Sept. 26 | Sunny | 40° /19° | 0 mm | 10 | |
| Sept. 27 | Sunny | 40° /18° | 0 mm | 10 | |
| Sept. 28 | Overcast | 38° /19° | 0 mm | 9 | |
| Sept. 29 | Sunny | 39° /18° | 0 mm | 9 | |
| Sept. 30 | Sunny | 38° /16° | 0 mm | 9 | |
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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.
Pima County in September - FAQ
What are the expected maximum and minimum temperatures in Pima County during September?
Expect warm days with temperatures around 38°, cooling to mild conditions of 19° after sunset. Perfect for those who enjoy warm weather.
How much rainfall should be expected in Pima County during September?
Rainfall in Pima County during September is rare to nonexistent, with the total expected rainfall being less than 10 mm and approximately 4 days seeing any precipitation. Planning without the concern for rain is generally straightforward during this very dry period.
What are the typical wind conditions in Pima County during September?
The average wind speed in Pima County during September is 22 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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Where is Pima County?Get accurate weather forecasts for Pima County, located at latitude 32.222 and longitude -110.926. Stay updated with localized weather information tailored for Pima County.
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