Modesto
September
Weather in Modesto for September 2025
Your guide to Modesto weather in September - trends and predictions
In general, the average temperature in Modesto 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, Modesto 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
Modesto 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 Modesto
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 Modesto 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 Modesto forecast closer to your planned date for the most up-to-date weather information.
Modesto in September - FAQ
What are the expected maximum and minimum temperatures in Modesto 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 Modesto during September?
Rainfall in Modesto 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 Modesto during September?
The average wind speed in Modesto during September is 18 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Modesto
Explore the daily rainfall trends and prepare for Modestos September weather 💧
UV exposure in Modesto during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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