Jefferson County (Fairfield)
September
Weather in Jefferson County, Iowa for September 2027
Your guide to Jefferson County weather in September - trends and predictions
Jefferson County experiences moderate rainfall in September, with an average of 10 rainy days and a total precipitation of 152.3 mm.
Is September a good time to visit Jefferson County? check out the best time to travel to Jefferson County page.
✨ Is September a good time to visit Jefferson County? – Ask the AI Weatherman
Rain 🌧️
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20
Dry days
10
Rainy days
0
Snow days
26°/16°
Temperatures
18 km/h
Avg max wind
73 %
Avg humidity
Jefferson County Weather September
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Temperatures trend during September in Jefferson County
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September weather in Jefferson County day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 |  Mist | 31° /18° | 0 mm | 7 | |
| Sept. 2 |  Cloudy | 30° /17° | 0 mm | 7 | |
| Sept. 3 |  Heavy rain | 28° /18° | 31 mm | 6 | |
| Sept. 4 | Mist | 29° /14° | 0 mm | 7 | |
| Sept. 5 |  Overcast | 28° /18° | 0 mm | 7 | |
| Sept. 6 | Cloudy | 25° /15° | 0 mm | 6 | |
| Sept. 7 |  Sunny | 25° /12° | 0.1 mm | 4 | |
| Sept. 8 | Overcast | 29° /15° | 0 mm | 5 | |
| Sept. 9 |  Moderate rain | 26° /17° | 24.6 mm | 4 | |
| Sept. 10 |  Light rain shower | 26° /16° | 1.8 mm | 5 | |
| Sept. 11 | Fog | 29° /14° | 0 mm | 7 | |
| Sept. 12 | Overcast | 30° /17° | 0 mm | 7 | |
| Sept. 13 |  Light rain | 28° /18° | 2.5 mm | 5 | |
| Sept. 14 |  Thundery outbreaks possible | 29° /18° | 0.4 mm | 5 | |
| Sept. 15 | Thundery outbreaks possible | 29° /20° | 5.7 mm | 4 | |
| Sept. 16 |  Patchy light rain with thunder | 27° /17° | 9.7 mm | 4 | |
| Sept. 17 | Sunny | 30° /18° | 0.9 mm | 6 | |
| Sept. 18 | Light rain | 28° /17° | 5.6 mm | 6 | |
| Sept. 19 | Moderate rain | 26° /19° | 13.5 mm | 3 | |
| Sept. 20 | Moderate rain | 20° /16° | 17.9 mm | 3 | |
| Sept. 21 | Fog | 21° /16° | 0.8 mm | 4 | |
| Sept. 22 | Moderate rain | 20° /14° | 10.7 mm | 3 | |
| Sept. 23 | Fog | 22° /14° | 0 mm | 6 | |
| Sept. 24 | Overcast | 21° /14° | 0.3 mm | 4 | |
| Sept. 25 | Light rain | 20° /13° | 4.4 mm | 3 | |
| Sept. 26 | Patchy rain possible | 23° /13° | 1.3 mm | 4 | |
| Sept. 27 | Patchy rain possible | 22° /13° | 2.2 mm | 4 | |
| Sept. 28 | Mist | 26° /15° | 0 mm | 5.6 | |
| Sept. 29 |  Partly cloudy | 27° /15° | 0.5 mm | 4 | |
| Sept. 30 | Moderate rain | 24° /16° | 18.4 mm | 4 | |
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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.
Change Month
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 26° and lows near 16°, suitable for diverse activities and preferences.
How much rainfall should be expected in Jefferson County during September?
Significant rainfall exceeding 152.3 mm is expected in Jefferson County during September, occurring over more than 10 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Jefferson County during September?
The average wind speed in Jefferson County during September is 18 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 💧
Typically, Jefferson County has 10 rainy days in September with a total of 152.3 mm of rainfall.
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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