Riley County (Manhattan)
September
Weather in Riley County, Kansas for September 2026
Your guide to Riley County weather in September - trends and predictions
In general, the average temperature in Riley County at the beginning of September is 23.4 °F. As the month progressed, temperatures tended to significantly warm up, reaching an average of 28 °F by the end of September.
Riley County experiences moderate rainfall in September, with an average of 9 rainy days and a total precipitation of 113.9 mm.
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Temperatures
Rain 🌧️
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21
Dry days
9
Rainy days
0
Snow days
27°/16°
Temperatures
23 km/h
Avg max wind
77 %
Avg humidity
Riley County Weather September
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Temperatures trend during September in Riley County
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September weather in Riley County day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 |  Light rain shower | 18° /16° | 12.4 mm | 1 | |
| Sept. 2 |  Mist | 24° /16° | 0 mm | 5 | |
| Sept. 3 | Fog | 27° /14° | 0 mm | 8 | |
| Sept. 4 | Fog | 26° /14° | 0 mm | 6 | |
| Sept. 5 |  Moderate rain at times | 17° /14° | 3.4 mm | 4 | |
| Sept. 6 | Mist | 25° /7° | 0 mm | 8 | |
| Sept. 7 | Mist | 27° /8° | 0 mm | 8 | |
| Sept. 8 |  Moderate rain | 19° /15° | 27.8 mm | 3 | |
| Sept. 9 | Light rain shower | 26° /14° | 5.1 mm | 7 | |
| Sept. 10 |  Thundery outbreaks possible | 25° /16° | 0 mm | 7 | |
| Sept. 11 |  Cloudy | 33° /18° | 0 mm | 8 | |
| Sept. 12 |  Sunny | 36° /19° | 0 mm | 7 | |
| Sept. 13 | Sunny | 35° /19° | 0 mm | 7 | |
| Sept. 14 |  Overcast | 28° /21° | 4.1 mm | 3 | |
| Sept. 15 | Cloudy | 33° /19° | 0 mm | 7 | |
| Sept. 16 | Thundery outbreaks possible | 33° /18° | 0 mm | 7 | |
| Sept. 17 | Mist | 33° /18° | 0 mm | 7 | |
| Sept. 18 | Moderate or heavy rain shower | 25° /20° | 18.4 mm | 3 | |
| Sept. 19 | Fog | 29° /12° | 0 mm | 6 | |
| Sept. 20 | Light rain shower | 21° /17° | 6 mm | 2 | |
| Sept. 21 | Fog | 26° /17° | 0 mm | 5 | |
| Sept. 22 | Moderate or heavy rain shower | 30° /17° | 13.8 mm | 6 | |
| Sept. 23 | Moderate or heavy rain shower | 21° /17° | 22.9 mm | 1 | |
| Sept. 24 | Overcast | 23° /15° | 0 mm | 4 | |
| Sept. 25 | Sunny | 28° /13° | 0 mm | 6 | |
| Sept. 26 | Sunny | 29° /13° | 0 mm | 6 | |
| Sept. 27 | Cloudy | 31° /16° | 0 mm | 6 | |
| Sept. 28 | Mist | 29° /11° | 0 mm | 5 | |
| Sept. 29 | Mist | 29° /16° | 0 mm | 5 | |
| Sept. 30 | Overcast | 27° /15° | 0 mm | 2 | |
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Important Notice
Our weather forecast for Riley 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 Riley County forecast closer to your planned date for the most up-to-date weather information.
Change Month
Riley County in September - FAQ
What are the expected maximum and minimum temperatures in Riley County during September?
During September, expect a variety of temperatures with highs around 27° and lows near 16°, suitable for diverse activities and preferences.
How much rainfall should be expected in Riley County during September?
Significant rainfall exceeding 113.9 mm is expected in Riley County during September, occurring over more than 9 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Riley County during September?
The average wind speed in Riley County during September is 23 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Riley County
Explore the daily rainfall trends and prepare for Riley Countys September weather 💧
Typically, Riley County has 9 rainy days in September with a total of 113.9 mm of rainfall.
UV exposure in Riley County during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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Where is Riley County?Get accurate weather forecasts for Riley County, located at latitude 39.184 and longitude -96.572. Stay updated with localized weather information tailored for Riley County.
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