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Weather in Fairfield County for September 2025

Your guide to Fairfield County weather in September - trends and predictions
  • In general, the average temperature in Fairfield County at the beginning of September is 25.9 °F. As the month progressed, temperatures tended to significantly cool down, reaching an average of 18.9 °F by the end of September.

  • The climate of Fairfield County in September is notably wet, with an average of 14 rainy days.

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Average dry days
16
Dry days
Average rainy days
14
Rainy days
Average snowy days
0
Snow days
Average temperatures
23°/16°
Temperatures
Average wind speed
18 km/h
Avg max wind
Average humidity
75 %
Avg humidity

Fairfield County in September average weather

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Temperatures trend during September in Fairfield 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 Sunny
Sunny
25° /17° 1.5 mm 6
Sept. 2 Partly cloudy
Partly cloudy
25° /16° 0 mm 7
Sept. 3 Sunny
Sunny
26° /15° 0 mm 7
Sept. 4 Partly cloudy
Partly cloudy
26° /17° 0 mm 7
Sept. 5 Overcast
Overcast
26° /17° 0 mm 7
Sept. 6 Partly cloudy
Partly cloudy
27° /18° 0 mm 7
Sept. 7 Sunny
Sunny
26° /18° 3 mm 7
Sept. 8 Light rain shower
Light rain shower
25° /16° 2.4 mm 6
Sept. 9 Patchy light rain with thunder
Patchy light rain with thunder
25° /17° 3.1 mm 6
Sept. 10 Light rain shower
Light rain shower
26° /19° 4.6 mm 6
Sept. 11 Patchy rain possible
Patchy rain possible
24° /16° 2.8 mm 6
Sept. 12 Mist
Mist
24° /17° 0.9 mm 6
Sept. 13 Moderate or heavy rain shower
Moderate or heavy rain shower
24° /16° 31.2 mm 6
Sept. 14 Cloudy
Cloudy
24° /17° 0 mm 6
Sept. 15 Overcast
Overcast
22° /15° 0 mm 6
Sept. 16 Overcast
Overcast
23° /14° 0 mm 5
Sept. 17 Cloudy
Cloudy
22° /15° 0.6 mm 5
Sept. 18 Light rain shower
Light rain shower
20° /16° 20.6 mm 5
Sept. 19 Sunny
Sunny
22° /17° 0.7 mm 6
Sept. 20 Sunny
Sunny
21° /15° 0 mm 6
Sept. 21 Partly cloudy
Partly cloudy
23° /14° 0 mm 6
Sept. 22 Overcast
Overcast
20° /14° 0 mm 5
Sept. 23 Heavy rain
Heavy rain
18° /14° 29.6 mm 4
Sept. 24 Light rain shower
Light rain shower
19° /13° 0.9 mm 4
Sept. 25 Heavy rain
Heavy rain
17° /14° 37.8 mm 4
Sept. 26 Patchy rain possible
Patchy rain possible
20° /14° 21.3 mm 5
Sept. 27 Partly cloudy
Partly cloudy
20° /14° 2.5 mm 5
Sept. 28 Overcast
Overcast
20° /14° 0 mm 5
Sept. 29 Moderate rain
Moderate rain
17° /15° 3.1 mm 4
Sept. 30 Light rain shower
Light rain shower
19° /14° 4.2 mm 4
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Important Notice
Our weather forecast for Fairfield 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 Fairfield County forecast closer to your planned date for the most up-to-date weather information.

Fairfield County in September - FAQ

What are the expected maximum and minimum temperatures in Fairfield County during September?
During September, expect a variety of temperatures with highs around 23° and lows near 16°, suitable for diverse activities and preferences.
How much rainfall should be expected in Fairfield County during September?
Significant rainfall exceeding 273.6 mm is expected in Fairfield County during September, occurring over more than 14 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Fairfield County during September?
The average wind speed in Fairfield County during September is 18 km/h, suggesting breezy to windy conditions, depending on your activities.

September rainfall patterns in Fairfield County

Explore the daily rainfall trends and prepare for Fairfield Countys September weather 💧

UV exposure in Fairfield County during September

Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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Location coordinates Where is Fairfield County?

Get accurate weather forecasts for Fairfield County, located at latitude 41.179 and longitude -73.189. Stay updated with localized weather information tailored for Fairfield County.

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