Portage County (Stevens Point)
September
Weather in Portage County, Wisconsin for September 2026
Your guide to Portage County weather in September - trends and predictions
So far, September 2026 in Portage County is slightly warmer than the historical average by 0.9 °F.
Expect cooler weather in the next days in Portage County with the forecast suggesting a temperature of 15.5 °F, lower than the historical average.
In general, the average temperature in Portage County at the beginning of September is 23.3 °F. As the month progressed, temperatures tended to significantly cool down, reaching an average of 16.3 °F by the end of September.
Portage County experiences moderate rainfall in September, with an average of 9 rainy days and a total precipitation of 87.5 mm.
New! Chat with our AI weatherman - it’s amazing and free.
Temperatures
Rain 🌧️
More
21
Dry days
9
Rainy days
0
Snow days
22°/12°
Temperatures
17 km/h
Avg max wind
80 %
Avg humidity
Portage County Weather September
Move between months or click on a day
Temperatures trend during September in Portage County
See the weather trend as well as the moving average line
September weather in Portage County day by day
Click on a date for more information
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 |  Fog | 29° /15° | 0.1 mm | 6 | |
| Sept. 2 | Fog | 25° /14° | 19.6 mm | 4 | |
| Sept. 3 |  Moderate or heavy rain shower | 23° /14° | 26.1 mm | 4 | |
| Sept. 4 | Mist | 23° /9° | 2.7 mm | 3 | |
| Sept. 5 |  Overcast | 21° /13° | 7.8 mm | 4 | |
| Sept. 6 | Overcast | 21° /10° | 0 mm | 5 | |
| Sept. 7 |  Sunny | 21° /8° | 0 mm | 3 | |
| Sept. 8 | Mist | 21° /10° | 11.8 mm | 3 | |
| Sept. 9 | Moderate rain at times | 25° /16° | 1.7 mm | 6 | |
| Sept. 10 |  Thundery outbreaks possible | 24° /13° | 1.5 mm | 6 | |
| Sept. 11 | Fog | 24° /12° | 0 mm | 6 | |
| Sept. 12 | Mist | 23° /13° | 0.2 mm | 4 | |
| Sept. 13 | Moderate or heavy rain shower | 21° /13° | 8 mm | 5 | |
| Sept. 14 | Mist | 25° /11° | 13 mm | 5 | |
| Sept. 15 | Fog | 25° /14° | 3.9 mm | 4 | |
| Sept. 16 | Sunny | 24° /12° | 0 mm | 4 | |
| Sept. 17 | Thundery outbreaks possible | 24° /13° | 1 mm | 5 | |
| Sept. 18 | Thundery outbreaks possible | 20° /15° | 6.1 mm | 4 | |
| Sept. 19 | Thundery outbreaks possible | 16° /12° | 3.1 mm | 3 | |
| Sept. 20 | Overcast | 16° /9° | 0 mm | 5.2 | |
| Sept. 21 | Overcast | 14° /8° | 0 mm | 4.8 | |
| Sept. 22 | Sunny | 16° /8° | 0 mm | 5.2 | |
| Sept. 23 | Sunny | 17° /8° | 0 mm | 5.1 | |
| Sept. 24 | Overcast | 18° /10° | 0 mm | 4 | |
| Sept. 25 | Sunny | 19° /12° | 0 mm | 5 | |
| Sept. 26 | Sunny | 21° /13° | 0 mm | 6 | |
| Sept. 27 | Sunny | 20° /14° | 0 mm | 5 | |
| Sept. 28 | Overcast | 15° /5° | 10.8 mm | 3 | |
| Sept. 29 | Sunny | 11° /2° | 0.2 mm | 4 | |
| Sept. 30 |  Patchy rain possible | 10° /7° | 3.3 mm | 2 | |
| Next | |||||
Important Notice
Our weather forecast for Portage 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 Portage County forecast closer to your planned date for the most up-to-date weather information.
Change Month
Portage County in September - FAQ
What are the expected maximum and minimum temperatures in Portage County during September?
Enjoy moderate daytime temperatures of up to 22° and cooler nights around 12°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Portage County during September?
Moderate rainfall is anticipated in Portage County during September, with a total of 87.5 mm spread over approximately 9 days. Considering plans for rainy days is advisable.
What are the typical wind conditions in Portage County during September?
The average wind speed in Portage County during September is 17 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Portage County
Explore the daily rainfall trends and prepare for Portage Countys September weather 💧
Typically, Portage County has 9 rainy days in September with a total of 87.5 mm of rainfall.
UV exposure in Portage County during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
Top locations in Portage County
Select a location for an accurate weather forecast
More Locations Quick links
More Portage County weather pages
You are here
Where is Portage County?Get accurate weather forecasts for Portage County, located at latitude 44.524 and longitude -89.575. Stay updated with localized weather information tailored for Portage County.
Found a mistake?
We appreciate your attention to details. Tell us here.