Johnson County
September
Weather in Johnson County for September 2025
Your guide to Johnson County weather in September - trends and predictions
In general, the average temperature in Johnson County at the beginning of September is 33.7 °F. As the month progressed, temperatures tended to significantly cool down, reaching an average of 30.1 °F by the end of September.
Johnson County sees moderate rainfall in September, averaging 9 rainy days.
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21
Dry days
9
Rainy days
0
Snow days
32°/17°
Temperatures
19 km/h
Avg max wind
52 %
Avg humidity
Johnson County in September average weather
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| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  34° | 2 33° | 3 35° | 4  36° | 5  38° | 6 30° | 7 30° |
| 8  31° | 9  32° | 10  34° | 11  29° | 12  31° | 13 28° | 14 31° |
| 15 31° | 16 29° | 17 30° | 18 32° | 19 35° | 20 30° | 21 31° |
| 22 28° | 23  25° | 24 27° | 25 29° | 26 29° | 27 29° | 28 32° |
| 29 32° | 30  33° |
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Temperatures trend during September in Johnson County
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September weather day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 | Sunny | 34° /17° | 0 mm | 9 | |
| Sept. 2 | Sunny | 33° /15° | 0 mm | 8 | |
| Sept. 3 | Sunny | 35° /17° | 0 mm | 8 | |
| Sept. 4 | Partly cloudy | 36° /19° | 0 mm | 9 | |
| Sept. 5 | Thundery outbreaks possible | 38° /19° | 2.4 mm | 9 | |
| Sept. 6 | Sunny | 30° /16° | 0 mm | 8 | |
| Sept. 7 | Sunny | 30° /14° | 0 mm | 8 | |
| Sept. 8 | Patchy rain possible | 31° /13° | 0.2 mm | 7 | |
| Sept. 9 | Cloudy | 32° /15° | 0 mm | 8 | |
| Sept. 10 | Overcast | 34° /15° | 0 mm | 8 | |
| Sept. 11 | Heavy rain | 29° /16° | 7.4 mm | 7 | |
| Sept. 12 | Mist | 31° /16° | 0 mm | 7 | |
| Sept. 13 | Sunny | 28° /16° | 0 mm | 7 | |
| Sept. 14 | Overcast | 31° /16° | 0 mm | 7 | |
| Sept. 15 | Cloudy | 31° /16° | 0 mm | 7 | |
| Sept. 16 | Overcast | 29° /16° | 0.2 mm | 6 | |
| Sept. 17 | Sunny | 30° /16° | 0 mm | 8 | |
| Sept. 18 | Sunny | 32° /17° | 0 mm | 8 | |
| Sept. 19 | Thundery outbreaks possible | 35° /20° | 0 mm | 8 | |
| Sept. 20 | Light rain shower | 30° /19° | 8.8 mm | 7 | |
| Sept. 21 | Thundery outbreaks possible | 31° /19° | 7.4 mm | 7 | |
| Sept. 22 | Thundery outbreaks possible | 28° /16° | 49 mm | 7 | |
| Sept. 23 | Patchy light rain with thunder | 25° /15° | 18.3 mm | 6 | |
| Sept. 24 | Fog | 27° /15° | 7.2 mm | 6 | |
| Sept. 25 | Sunny | 29° /15° | 0 mm | 7 | |
| Sept. 26 | Partly cloudy | 29° /16° | 0 mm | 7 | |
| Sept. 27 | Patchy rain possible | 29° /15° | 0.5 mm | 7 | |
| Sept. 28 | Partly cloudy | 32° /16° | 0 mm | 8 | |
| Sept. 29 | Sunny | 32° /17° | 0 mm | 8 | |
| Sept. 30 | Moderate rain at times | 33° /18° | 0.5 mm | 8 | |
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Important Notice
Our weather forecast for Johnson 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 Johnson County forecast closer to your planned date for the most up-to-date weather information.
Johnson County in September - FAQ
What are the expected maximum and minimum temperatures in Johnson County 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 Johnson County during September?
Moderate rainfall is anticipated in Johnson County during September, with a total of 75 mm spread over approximately 9 days. Considering plans for rainy days is advisable.
What are the typical wind conditions in Johnson County during September?
The average wind speed in Johnson County during September is 19 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Johnson County
Explore the daily rainfall trends and prepare for Johnson Countys September weather 💧
UV exposure in Johnson County during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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Where is Johnson County?Get accurate weather forecasts for Johnson County, located at latitude 38.982 and longitude -94.671. Stay updated with localized weather information tailored for Johnson County.
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