Olmsted County (Rochester)
September
Weather in Olmsted County, Minnesota for September 2025
Your guide to Olmsted County weather in September - trends and predictions
Until now, September 2025 in Olmsted County is slightly cooler than the historical average by -1.5 °F.
The forecast for the next days in Olmsted County predicts temperatures to be around 22 °F, close to the historical average.
In general, the average temperature in Olmsted County at the beginning of September is 18.7 °F. As the month progressed, temperatures tended to noticeably warm up, reaching an average of 21 °F by the end of September.
With an average of 4 rainy days, Olmsted County experiences minimal rainfall in September.
New! Chat with our AI weatherman - it’s amazing and free.
Temperatures
Rain 🌧️
More
26
Dry days
4
Rainy days
0
Snow days
24°/12°
Temperatures
20 km/h
Avg max wind
69 %
Avg humidity
Olmsted County Weather September
Move between months or click on a day
Temperatures trend during September in Olmsted County
See the weather trend as well as the moving average line
September weather in Olmsted County day by day
Click on a date for more information
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 |  Overcast | 21° /13° | 0 mm | 5 | |
| Sept. 2 |  Sunny | 21° /11° | 4.8 mm | 6 | |
| Sept. 3 | Sunny | 19° /11° | 1.6 mm | 5 | |
| Sept. 4 | Sunny | 19° /10° | 13.2 mm | 5 | |
| Sept. 5 |  Patchy light drizzle | 18° /10° | 0.2 mm | 4 | |
| Sept. 6 |  Light rain shower | 16° /6° | 1 mm | 4 | |
| Sept. 7 | Sunny | 17° /4° | 0 mm | 5 | |
| Sept. 8 | Sunny | 22° /8° | 0 mm | 6 | |
| Sept. 9 | Sunny | 25° /14° | 0 mm | 6 | |
| Sept. 10 | Patchy rain possible | 25° /15° | 0.5 mm | 6 | |
| Sept. 11 | Sunny | 23° /16° | 0 mm | 6 | |
| Sept. 12 | Sunny | 26° /14° | 2.9 mm | 6 | |
| Sept. 13 | Overcast | 27° /16° | 3.1 mm | 6 | |
| Sept. 14 | Light rain shower | 27° /18° | 2.5 mm | 6 | |
| Sept. 15 |  Thundery outbreaks possible | 29° /19° | 0 mm | 1.1 | |
| Sept. 16 | Thundery outbreaks possible | 28° /19° | 0 mm | 1.3 | |
| Sept. 17 |  Moderate rain | 31° /18° | 11.3 mm | 1.3 | |
| Sept. 18 |  Heavy rain | 21° /16° | 20.8 mm | 0.8 | |
| Sept. 19 | Moderate rain | 22° /16° | 13.9 mm | 0 | |
| Sept. 20 | Patchy rain possible | 22° /14° | 4.2 mm | 4 | |
| Sept. 21 | Patchy rain possible | 24° /14° | 0.3 mm | 4 | |
| Sept. 22 | Patchy rain possible | 19° /15° | 2.7 mm | 4 | |
| Sept. 23 | Patchy rain possible | 21° /13° | 2.5 mm | 4 | |
| Sept. 24 | Sunny | 20° /10° | 0 mm | 4 | |
| Sept. 25 |  Cloudy | 18° /9° | 0 mm | 3 | |
| Sept. 26 | Sunny | 22° /11° | 0 mm | 5 | |
| Sept. 27 |  Partly cloudy | 23° /12° | 0 mm | 5 | |
| Sept. 28 | Moderate rain | 12° /11° | 11.6 mm | 3 | |
| Sept. 29 | Sunny | 26° /11° | 0 mm | 7 | |
| Sept. 30 |  Mist | 26° /9° | 0 mm | 6 | |
| Next | |||||
Important Notice
Our weather forecast for Olmsted 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 Olmsted County forecast closer to your planned date for the most up-to-date weather information.
Change Month
Olmsted County in September - FAQ
What are the expected maximum and minimum temperatures in Olmsted County during September?
Enjoy moderate daytime temperatures of up to 24° and cooler nights around 12°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Olmsted County during September?
In September, Olmsted County can expect light to moderate rainfall, totaling 21.6 mm across approximately 4 days. Occasional showers are possible, and planning ahead for them could be helpful.
What are the typical wind conditions in Olmsted County during September?
The average wind speed in Olmsted County during September is 20 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Olmsted County
Explore the daily rainfall trends and prepare for Olmsted Countys September weather 💧
UV exposure in Olmsted County during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
Top locations in Olmsted County
Select a location for an accurate weather forecast
More Locations Quick links
More Olmsted County weather pages
You are here
Where is Olmsted County?Get accurate weather forecasts for Olmsted County, located at latitude 44.022 and longitude -92.47. Stay updated with localized weather information tailored for Olmsted County.
Found a mistake?
We appreciate your attention to details. Tell us here.