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Weather in Jefferson County for September 2025

Your guide to Jefferson County weather in September - trends and predictions
  • In general, the average temperature in Jefferson County at the beginning of September is 31.4 °F. As the month progressed, temperatures tended to significantly cool down, reaching an average of 25.3 °F by the end of September.

  • Jefferson County sees moderate rainfall in September, averaging 7 rainy days.

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Average dry days
23
Dry days
Average rainy days
7
Rainy days
Average snowy days
0
Snow days
Average temperatures
29°/15°
Temperatures
Average wind speed
12 km/h
Avg max wind
Average humidity
61 %
Avg humidity

Jefferson County in September average weather

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Temperatures trend during September in Jefferson 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
33° /16° 0.3 mm 8
Sept. 2 Mist
Mist
32° /17° 0 mm 7
Sept. 3 Partly cloudy
Partly cloudy
31° /16° 0 mm 7
Sept. 4 Partly cloudy
Partly cloudy
33° /20° 0 mm 8
Sept. 5 Overcast
Overcast
33° /21° 0 mm 8
Sept. 6 Light rain shower
Light rain shower
33° /20° 6.5 mm 7
Sept. 7 Overcast
Overcast
25° /13° 0.4 mm 6
Sept. 8 Cloudy
Cloudy
26° /11° 0.8 mm 6
Sept. 9 Overcast
Overcast
29° /14° 0 mm 7
Sept. 10 Partly cloudy
Partly cloudy
31° /15° 0 mm 8
Sept. 11 Mist
Mist
32° /15° 0 mm 8
Sept. 12 Overcast
Overcast
28° /18° 0 mm 7
Sept. 13 Mist
Mist
27° /14° 5.1 mm 6
Sept. 14 Sunny
Sunny
29° /14° 0.1 mm 7
Sept. 15 Sunny
Sunny
30° /15° 0 mm 8
Sept. 16 Overcast
Overcast
30° /14° 0 mm 7
Sept. 17 Patchy light rain with thunder
Patchy light rain with thunder
28° /14° 1.5 mm 7
Sept. 18 Mist
Mist
26° /14° 0 mm 6
Sept. 19 Sunny
Sunny
28° /14° 0 mm 7
Sept. 20 Partly cloudy
Partly cloudy
31° /17° 0 mm 8
Sept. 21 Cloudy
Cloudy
32° /20° 0 mm 7
Sept. 22 Partly cloudy
Partly cloudy
31° /19° 3.2 mm 8
Sept. 23 Sunny
Sunny
26° /18° 3.7 mm 6
Sept. 24 Overcast
Overcast
26° /15° 17.2 mm 6
Sept. 25 Patchy rain possible
Patchy rain possible
25° /17° 0 mm 6
Sept. 26 Patchy rain possible
Patchy rain possible
27° /16° 0.4 mm 6
Sept. 27 Patchy light rain with thunder
Patchy light rain with thunder
25° /17° 41.2 mm 6
Sept. 28 Patchy light rain with thunder
Patchy light rain with thunder
23° /17° 75.3 mm 5
Sept. 29 Mist
Mist
25° /15° 15.1 mm 6
Sept. 30 Mist
Mist
26° /15° 0 mm 6
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Important Notice
Our weather forecast for Jefferson 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 Jefferson County forecast closer to your planned date for the most up-to-date weather information.

Jefferson County in September - FAQ

What are the expected maximum and minimum temperatures in Jefferson County during September?
During September, expect a variety of temperatures with highs around 29° and lows near 15°, suitable for diverse activities and preferences.
How much rainfall should be expected in Jefferson County during September?
Moderate rainfall is anticipated in Jefferson County during September, with a total of 95.3 mm spread over approximately 7 days. Considering plans for rainy days is advisable.
What are the typical wind conditions in Jefferson County during September?
The average wind speed in Jefferson County during September is 12 km/h, suggesting breezy to windy conditions, depending on your activities.

September rainfall patterns in Jefferson County

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

UV exposure in Jefferson 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 Jefferson County?

Get accurate weather forecasts for Jefferson County, located at latitude 38.254 and longitude -85.759. Stay updated with localized weather information tailored for Jefferson County.

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