Folsom (CA)
September
Weather in Folsom, California for September 2026
Your guide to Folsom weather in September - trends and predictions
Until now, September 2026 in Folsom is slightly cooler than the historical average by 1.5 °F.
The forecast for the upcoming days in Folsom predicts a temperature of 31.9 °F, which is slightly above the historical average.
In general, the average temperature in Folsom at the beginning of September is 33.7 °F. As the month progressed, temperatures tended to significantly cool down, reaching an average of 30.4 °F by the end of September.
Precipitation in Folsom during September is a rare event, with an average of fewer than 2 rainy days.
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Temperatures
Rain 🌧️
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30
Dry days
0
Rainy days
0
Snow days
32°/17°
Temperatures
11 km/h
Avg max wind
43 %
Avg humidity
Folsom Weather September
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Temperatures trend during September in Folsom
See the weather trend as well as the moving average line
September weather in Folsom day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 |  Sunny | 34° /17° | 0 mm | 8 | |
| Sept. 2 | Sunny | 32° /16° | 0 mm | 9 | |
| Sept. 3 | Sunny | 33° /16° | 0.1 mm | 8 | |
| Sept. 4 | Sunny | 35° /18° | 3 mm | 7 | |
| Sept. 5 | Sunny | 34° /16° | 0 mm | 9 | |
| Sept. 6 | Sunny | 34° /17° | 0 mm | 8 | |
| Sept. 7 |  Partly cloudy | 34° /16° | 0 mm | 8 | |
| Sept. 8 | Sunny | 34° /16° | 0 mm | 8 | |
| Sept. 9 |  Overcast | 33° /19° | 0 mm | 5 | |
| Sept. 10 | Overcast | 32° /18° | 0 mm | 7 | |
| Sept. 11 | Sunny | 30° /15° | 0 mm | 7 | |
| Sept. 12 | Sunny | 31° /15° | 0 mm | 8 | |
| Sept. 13 | Sunny | 30° /14° | 0 mm | 8 | |
| Sept. 14 | Sunny | 32° /15° | 0 mm | 7 | |
| Sept. 15 | Partly cloudy | 31° /16° | 0 mm | 7 | |
| Sept. 16 | Sunny | 29° /15° | 0 mm | 7 | |
| Sept. 17 | Overcast | 28° /15° | 0 mm | 7 | |
| Sept. 18 | Overcast | 27° /16° | 0 mm | 6 | |
| Sept. 19 | Overcast | 30° /16° | 0 mm | 7 | |
| Sept. 20 | Partly cloudy | 31° /16° | 0 mm | 5 | |
| Sept. 21 | Sunny | 29° /15° | 0 mm | 5.8 | |
| Sept. 22 | Sunny | 30° /15° | 0 mm | 6.2 | |
| Sept. 23 | Sunny | 34° /18° | 0 mm | 6.3 | |
| Sept. 24 | Sunny | 34° /21° | 0 mm | 6 | |
| Sept. 25 | Sunny | 30° /17° | 0 mm | 6 | |
| Sept. 26 | Overcast | 29° /18° | 0 mm | 7 | |
| Sept. 27 | Sunny | 27° /15° | 0 mm | 7 | |
| Sept. 28 | Sunny | 30° /15° | 0 mm | 7 | |
| Sept. 29 | Sunny | 31° /17° | 0 mm | 7 | |
| Sept. 30 | Sunny | 32° /18° | 0 mm | 8 | |
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Important Notice
Our weather forecast for Folsom 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 Folsom forecast closer to your planned date for the most up-to-date weather information.
Change Month
Folsom in September - FAQ
What are the expected maximum and minimum temperatures in Folsom during September?
Expect warm days with temperatures around 32°, cooling to mild conditions of 17° after sunset. Perfect for those who enjoy warm weather.
How much rainfall should be expected in Folsom during September?
Rainfall in Folsom during September is rare to nonexistent, with the total expected rainfall being less than 10 mm and approximately 0 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 Folsom during September?
The average wind speed in Folsom during September is 11 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Folsom
Explore the daily rainfall trends and prepare for Folsoms September weather 💧
UV exposure in Folsom during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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