Fairfield
September
Weather in Fairfield for September 2025
Your guide to Fairfield weather in September - trends and predictions
In general, the average temperature in Fairfield at the beginning of September is 33.1 °F. As the month progressed, temperatures tended to moderately fall, reaching an average of 31.4 °F by the end of September.
Precipitation in Fairfield 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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29
Dry days
1
Rainy days
0
Snow days
30°/13°
Temperatures
17 km/h
Avg max wind
57 %
Avg humidity
Fairfield Weather September
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| Sun. | Mon. | Tue. | Wed. | Thu. | Fri. | Sat. |
|---|---|---|---|---|---|---|
| 1  27° | 2 28° | 3  38° | 4 37° | 5 37° | 6 35° | |
| 7 30° | 8 33° | 9 30° | 10 25° | 11 30° | 12 30° | 13 31° |
| 14 27° | 15  22° | 16  22° | 17 19° | 18 23° | 19  27° | 20 25° |
| 21 28° | 22 32° | 23 37° | 24 36° | 25 24° | 26 30° | 27 35° |
| 28 28° | 29 30° | 30 37° |
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Temperatures trend during September in Fairfield
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 | Sunny | 27° /13° | 0 mm | 7 | |
| Sept. 2 | Sunny | 28° /12° | 0 mm | 7 | |
| Sept. 3 | Partly cloudy | 38° /13° | 0 mm | 9 | |
| Sept. 4 | Sunny | 37° /16° | 0 mm | 9 | |
| Sept. 5 | Sunny | 37° /16° | 0 mm | 9 | |
| Sept. 6 | Sunny | 35° /16° | 0 mm | 9 | |
| Sept. 7 | Sunny | 30° /14° | 0 mm | 8 | |
| Sept. 8 | Sunny | 33° /12° | 0 mm | 8 | |
| Sept. 9 | Sunny | 30° /14° | 0 mm | 8 | |
| Sept. 10 | Sunny | 25° /12° | 0 mm | 7 | |
| Sept. 11 | Sunny | 30° /12° | 0 mm | 8 | |
| Sept. 12 | Sunny | 30° /12° | 0 mm | 8 | |
| Sept. 13 | Sunny | 31° /13° | 0 mm | 8 | |
| Sept. 14 | Sunny | 27° /13° | 0 mm | 7 | |
| Sept. 15 | Overcast | 22° /13° | 0 mm | 5 | |
| Sept. 16 | Patchy rain possible | 22° /12° | 1.1 mm | 5 | |
| Sept. 17 | Overcast | 19° /11° | 0 mm | 4 | |
| Sept. 18 | Overcast | 23° /12° | 0 mm | 5 | |
| Sept. 19 | Cloudy | 27° /11° | 0 mm | 6 | |
| Sept. 20 | Overcast | 25° /11° | 0 mm | 6 | |
| Sept. 21 | Overcast | 28° /11° | 0 mm | 6 | |
| Sept. 22 | Sunny | 32° /12° | 0 mm | 8 | |
| Sept. 23 | Overcast | 37° /14° | 0 mm | 8 | |
| Sept. 24 | Partly cloudy | 36° /16° | 0 mm | 9 | |
| Sept. 25 | Overcast | 24° /12° | 0 mm | 5 | |
| Sept. 26 | Overcast | 30° /11° | 0 mm | 7 | |
| Sept. 27 | Sunny | 35° /13° | 0 mm | 9 | |
| Sept. 28 | Partly cloudy | 28° /12° | 0 mm | 7 | |
| Sept. 29 | Overcast | 30° /12° | 0 mm | 7 | |
| Sept. 30 | Sunny | 37° /13° | 0 mm | 9 | |
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Important Notice
Our weather forecast for Fairfield 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 Fairfield forecast closer to your planned date for the most up-to-date weather information.
Fairfield in September - FAQ
What are the expected maximum and minimum temperatures in Fairfield during September?
Expect warm days with temperatures around 30°, cooling to mild conditions of 13° after sunset. Perfect for those who enjoy warm weather.
How much rainfall should be expected in Fairfield during September?
Rainfall in Fairfield 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 Fairfield during September?
The average wind speed in Fairfield during September is 17 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Fairfield
Explore the daily rainfall trends and prepare for Fairfields September weather 💧
UV exposure in Fairfield during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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