Johnson County (Overland Park)
September
Weather in Johnson County, Kansas for September 2026
Your guide to Johnson County weather in September - trends and predictions
So far, September 2026 in Johnson County shows a warmer trend than usual by 2.3 °F.
The forecast for the upcoming days in Johnson County predicts a temperature of 26.2 °F, which is slightly above the historical average.
In general, the average temperature in Johnson County at the beginning of September is 32.6 °F. As the month progressed, temperatures tended to significantly cool down, reaching an average of 25.7 °F by the end of September.
The climate of Johnson County in September is notably wet, with an average of 12 rainy days, and a total of 133.1 mm of precipitation.
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Temperatures
Rain 🌧️
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18
Dry days
12
Rainy days
0
Snow days
30°/17°
Temperatures
18 km/h
Avg max wind
58 %
Avg humidity
Johnson County Weather September
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Temperatures trend during September in Johnson County
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September weather in Johnson County day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 |  Sunny | 32° /18° | 8.6 mm | 8 | |
| Sept. 2 | Sunny | 32° /18° | 0 mm | 8 | |
| Sept. 3 | Sunny | 34° /19° | 4.7 mm | 8 | |
| Sept. 4 | Sunny | 34° /19° | 0.4 mm | 8 | |
| Sept. 5 |  Overcast | 34° /19° | 1.2 mm | 6 | |
| Sept. 6 | Sunny | 31° /16° | 0.7 mm | 6 | |
| Sept. 7 | Sunny | 31° /16° | 5.3 mm | 8 | |
| Sept. 8 | Sunny | 32° /16° | 2.7 mm | 7 | |
| Sept. 9 |  Cloudy | 29° /16° | 10.3 mm | 6 | |
| Sept. 10 | Overcast | 31° /18° | 1.2 mm | 6 | |
| Sept. 11 |  Heavy rain | 31° /17° | 3.7 mm | 7 | |
| Sept. 12 |  Mist | 32° /18° | 1.2 mm | 7 | |
| Sept. 13 | Sunny | 30° /17° | 0.5 mm | 6 | |
| Sept. 14 | Overcast | 33° /18° | 0 mm | 7 | |
| Sept. 15 | Cloudy | 33° /19° | 1.9 mm | 7 | |
| Sept. 16 | Overcast | 31° /19° | 3.2 mm | 7 | |
| Sept. 17 | Sunny | 32° /20° | 0 mm | 7 | |
| Sept. 18 | Sunny | 31° /20° | 7.5 mm | 7 | |
| Sept. 19 |  Thundery outbreaks possible | 33° /19° | 1 mm | 7 | |
| Sept. 20 |  Light rain shower | 26° /19° | 5.9 mm | 5 | |
| Sept. 21 | Thundery outbreaks possible | 28° /18° | 3.9 mm | 5 | |
| Sept. 22 | Patchy rain possible | 20° /15° | 0.3 mm | 2.5 | |
| Sept. 23 | Sunny | 23° /12° | 0 mm | 6.8 | |
| Sept. 24 | Overcast | 24° /14° | 0 mm | 5.2 | |
| Sept. 25 | Overcast | 25° /17° | 0.5 mm | 4.8 | |
| Sept. 26 | Overcast | 25° /18° | 1.7 mm | 6 | |
| Sept. 27 | Sunny | 29° /20° | 0 mm | 7 | |
| Sept. 28 | Sunny | 30° /20° | 0 mm | 8 | |
| Sept. 29 | Light rain shower | 24° /20° | 7.5 mm | 5 | |
| Sept. 30 | Sunny | 23° /17° | 0 mm | 6 | |
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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.
Change Month
Johnson County in September - FAQ
What are the expected maximum and minimum temperatures in Johnson County during September?
Expect warm days with temperatures around 30°, 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?
Significant rainfall exceeding 133.1 mm is expected in Johnson County during September, occurring over more than 12 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Johnson County during September?
The average wind speed in Johnson County during September is 18 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 💧
Typically, Johnson County has 12 rainy days in September with a total of 133.1 mm of rainfall.
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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