Tuolumne County (Sonora)
September
Weather in Tuolumne County, California for September 2026
Your guide to Tuolumne County weather in September - trends and predictions
Until now, September 2026 in Tuolumne County has been significantly cooler than historical averages by 2 °F, with average temperature of 28.8 °F.
The forecast for the next days in Tuolumne County predicts temperatures to be around 30 °F, close to the historical average.
In general, the average temperature in Tuolumne County at the beginning of September is 33.3 °F. As the month progressed, temperatures tended to noticeably cool down, reaching an average of 30.6 °F by the end of September.
Precipitation in Tuolumne County during September is a rare event, with an average of fewer than 2 rainy days.
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Temperatures
Rain 🌧️
More
29
Dry days
1
Rainy days
0
Snow days
31°/17°
Temperatures
13 km/h
Avg max wind
37 %
Avg humidity
Tuolumne County Weather September
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Temperatures trend during September in Tuolumne County
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September weather in Tuolumne County day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 |  Sunny | 34° /18° | 0 mm | 9 | |
| Sept. 2 | Sunny | 33° /18° | 0 mm | 9 | |
| Sept. 3 | Sunny | 33° /17° | 0 mm | 9 | |
| Sept. 4 | Sunny | 33° /19° | 0 mm | 9 | |
| Sept. 5 | Sunny | 34° /18° | 0 mm | 9 | |
| Sept. 6 | Sunny | 33° /18° | 0 mm | 8 | |
| Sept. 7 | Sunny | 33° /17° | 0 mm | 9 | |
| Sept. 8 | Sunny | 33° /18° | 0 mm | 7 | |
| Sept. 9 |  Overcast | 32° /18° | 0 mm | 5 | |
| Sept. 10 | Overcast | 30° /18° | 0 mm | 7 | |
| Sept. 11 | Sunny | 30° /16° | 0 mm | 7 | |
| Sept. 12 | Sunny | 30° /14° | 0 mm | 7 | |
| Sept. 13 | Sunny | 28° /14° | 0 mm | 8 | |
| Sept. 14 | Sunny | 30° /16° | 0 mm | 8 | |
| Sept. 15 |  Partly cloudy | 30° /15° | 0 mm | 8 | |
| Sept. 16 | Sunny | 27° /14° | 0 mm | 7 | |
| Sept. 17 | Sunny | 27° /14° | 0 mm | 7 | |
| Sept. 18 | Overcast | 25° /15° | 0 mm | 6 | |
| Sept. 19 | Overcast | 26° /13° | 2.6 mm | 6 | |
| Sept. 20 | Overcast | 29° /19° | 0 mm | 5.3 | |
| Sept. 21 | Overcast | 29° /19° | 0 mm | 6.1 | |
| Sept. 22 | Sunny | 29° /18° | 0 mm | 6.7 | |
| Sept. 23 | Sunny | 32° /20° | 0 mm | 4.9 | |
| Sept. 24 |  Smoky haze | 33° /22° | 0 mm | 8 | |
| Sept. 25 | Sunny | 30° /21° | 0 mm | 7 | |
| Sept. 26 | Sunny | 29° /18° | 0 mm | 7 | |
| Sept. 27 | Sunny | 31° /19° | 0 mm | 8 | |
| Sept. 28 | Sunny | 33° /21° | 0 mm | 8 | |
| Sept. 29 | Sunny | 32° /22° | 0 mm | 8 | |
| Sept. 30 | Overcast | 26° /20° | 0 mm | 6 | |
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Important Notice
Our weather forecast for Tuolumne 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 Tuolumne County forecast closer to your planned date for the most up-to-date weather information.
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Tuolumne County in September - FAQ
What are the expected maximum and minimum temperatures in Tuolumne County during September?
Expect warm days with temperatures around 31°, cooling to mild conditions of 17° after sunset. Perfect for those who enjoy warm weather.
How much rainfall should be expected in Tuolumne County during September?
Rainfall in Tuolumne County during September is rare to nonexistent, with the total expected rainfall being less than 10 mm and approximately 1 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 Tuolumne County during September?
The average wind speed in Tuolumne County during September is 13 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Tuolumne County
Explore the daily rainfall trends and prepare for Tuolumne Countys September weather 💧
Typically, Tuolumne County has 1 rainy days in September with a total of 3.9 mm of rainfall.
UV exposure in Tuolumne County during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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Where is Tuolumne County?Get accurate weather forecasts for Tuolumne County, located at latitude 37.984 and longitude -120.382. Stay updated with localized weather information tailored for Tuolumne County.
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