Stanislaus County (Modesto)
September
Weather in Stanislaus County for September 2025
Your guide to Stanislaus County weather in September - trends and predictions
In general, the average temperature in Stanislaus County at the beginning of September is 35.7 °F. As the month progressed, temperatures tended to noticeably cool down, reaching an average of 33.1 °F by the end of September.
With an average of 2 rainy days, Stanislaus County experiences minimal rainfall in September.
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28
Dry days
2
Rainy days
0
Snow days
32°/12°
Temperatures
18 km/h
Avg max wind
52 %
Avg humidity
Stanislaus County in September average weather
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| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  32° | 2 32° | 3  33° | 4  37° | 5  38° | 6 40° | 7 38° |
| 8 38° | 9  38° | 10 36° | 11 34° | 12 32° | 13 34° | 14 36° |
| 15 33° | 16 28° | 17 28° | 18 27° | 19  31° | 20 32° | 21 32° |
| 22 33° | 23 34° | 24 36° | 25 33° | 26 32° | 27 35° | 28 34° |
| 29 34° | 30 28° |
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Temperatures trend during September in Stanislaus 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 | Overcast | 32° /14° | 0 mm | 8 | |
| Sept. 2 | Overcast | 32° /13° | 0 mm | 8 | |
| Sept. 3 | Patchy rain possible | 33° /15° | 0.2 mm | 8 | |
| Sept. 4 | Cloudy | 37° /15° | 0 mm | 9 | |
| Sept. 5 | Sunny | 38° /16° | 0 mm | 9 | |
| Sept. 6 | Sunny | 40° /18° | 0 mm | 10 | |
| Sept. 7 | Sunny | 38° /16° | 0 mm | 10 | |
| Sept. 8 | Sunny | 38° /16° | 0 mm | 9 | |
| Sept. 9 | Partly cloudy | 38° /15° | 0 mm | 9 | |
| Sept. 10 | Sunny | 36° /13° | 0 mm | 9 | |
| Sept. 11 | Sunny | 34° /13° | 0 mm | 9 | |
| Sept. 12 | Cloudy | 32° /12° | 0 mm | 8 | |
| Sept. 13 | Sunny | 34° /13° | 0 mm | 8 | |
| Sept. 14 | Sunny | 36° /16° | 0 mm | 9 | |
| Sept. 15 | Sunny | 33° /14° | 0 mm | 8 | |
| Sept. 16 | Sunny | 28° /12° | 0.1 mm | 7 | |
| Sept. 17 | Overcast | 28° /11° | 0 mm | 6 | |
| Sept. 18 | Cloudy | 27° /11° | 0 mm | 6 | |
| Sept. 19 | Mist | 31° /12° | 0 mm | 7 | |
| Sept. 20 | Sunny | 32° /12° | 0 mm | 8 | |
| Sept. 21 | Partly cloudy | 32° /11° | 0 mm | 8 | |
| Sept. 22 | Partly cloudy | 33° /11° | 0 mm | 8 | |
| Sept. 23 | Overcast | 34° /13° | 0 mm | 8 | |
| Sept. 24 | Mist | 36° /13° | 0 mm | 8 | |
| Sept. 25 | Mist | 33° /13° | 0 mm | 8 | |
| Sept. 26 | Partly cloudy | 32° /11° | 0 mm | 8 | |
| Sept. 27 | Partly cloudy | 35° /12° | 0 mm | 9 | |
| Sept. 28 | Partly cloudy | 34° /13° | 0 mm | 9 | |
| Sept. 29 | Cloudy | 34° /12° | 0 mm | 8 | |
| Sept. 30 | Light rain shower | 28° /13° | 2.5 mm | 7 | |
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Important Notice
Our weather forecast for Stanislaus 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 Stanislaus County forecast closer to your planned date for the most up-to-date weather information.
Stanislaus County in September - FAQ
What are the expected maximum and minimum temperatures in Stanislaus County during September?
Expect warm days with temperatures around 32°, cooling to mild conditions of 12° after sunset. Perfect for those who enjoy warm weather.
How much rainfall should be expected in Stanislaus County during September?
Rainfall in Stanislaus County during September is rare to nonexistent, with the total expected rainfall being less than 10 mm and approximately 2 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 Stanislaus County during September?
The average wind speed in Stanislaus County during September is 18 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Stanislaus County
Explore the daily rainfall trends and prepare for Stanislaus Countys September weather 💧
UV exposure in Stanislaus County during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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Where is Stanislaus County?Get accurate weather forecasts for Stanislaus County, located at latitude 37.639 and longitude -120.997. Stay updated with localized weather information tailored for Stanislaus County.
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