Wausau (WI)
September
Weather in Wausau, Wisconsin for September 2025
Your guide to Wausau weather in September - trends and predictions
Until now, September 2025 in Wausau is slightly cooler than the historical average by -1.9 °F.
The forecast for the upcoming days in Wausau predicts a temperature of 24.1 °F, which is slightly above the historical average.
In general, the average temperature in Wausau at the beginning of September is 18.4 °F. As the month progressed, temperatures tended to significantly warm up, reaching an average of 22.3 °F by the end of September.
With an average of 5 rainy days, Wausau experiences minimal rainfall in September.
New! Chat with our AI weatherman - it’s amazing and free.
Temperatures
Rain 🌧️
More
25
Dry days
5
Rainy days
0
Snow days
23°/11°
Temperatures
15 km/h
Avg max wind
74 %
Avg humidity
Wausau Weather September
Move between months or click on a day
Temperatures trend during September in Wausau
See the weather trend as well as the moving average line
September weather in Wausau day by day
Click on a date for more information
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 |  Sunny | 21° /11° | 0 mm | 5 | |
| Sept. 2 | Sunny | 22° /9° | 0 mm | 6 | |
| Sept. 3 | Sunny | 19° /8° | 5.4 mm | 5 | |
| Sept. 4 | Sunny | 18° /6° | 0 mm | 5 | |
| Sept. 5 |  Moderate rain at times | 17° /9° | 10.5 mm | 4 | |
| Sept. 6 |  Patchy rain possible | 15° /6° | 0.2 mm | 4 | |
| Sept. 7 | Sunny | 17° /3° | 0 mm | 5 | |
| Sept. 8 |  Partly cloudy | 19° /3° | 0 mm | 5 | |
| Sept. 9 | Sunny | 21° /12° | 8.5 mm | 5 | |
| Sept. 10 | Patchy rain possible | 24° /12° | 19.4 mm | 6 | |
| Sept. 11 |  Cloudy | 24° /13° | 0 mm | 6 | |
| Sept. 12 | Sunny | 23° /14° | 0 mm | 6 | |
| Sept. 13 |  Overcast | 24° /15° | 4.8 mm | 6 | |
| Sept. 14 | Cloudy | 26° /13° | 0 mm | 6 | |
| Sept. 15 | Overcast | 27° /15° | 0 mm | 6 | |
| Sept. 16 | Sunny | 30° /13° | 0 mm | 1.3 | |
| Sept. 17 | Patchy rain possible | 28° /15° | 3.3 mm | 1.3 | |
| Sept. 18 |  Moderate rain | 26° /14° | 12.7 mm | 1.3 | |
| Sept. 19 | Patchy rain possible | 26° /12° | 4.2 mm | 1 | |
| Sept. 20 | Moderate rain | 20° /13° | 12 mm | 0 | |
| Sept. 21 | Patchy rain possible | 27° /17° | 2.4 mm | 5 | |
| Sept. 22 | Moderate rain | 21° /13° | 19.5 mm | 4 | |
| Sept. 23 | Sunny | 23° /7° | 0 mm | 5 | |
| Sept. 24 | Sunny | 23° /10° | 0 mm | 5 | |
| Sept. 25 | Patchy rain possible | 25° /13° | 0.1 mm | 4 | |
| Sept. 26 | Patchy rain possible | 27° /15° | 0.2 mm | 4 | |
| Sept. 27 | Sunny | 15° /6° | 0 mm | 4 | |
| Sept. 28 | Sunny | 20° /4° | 0 mm | 4 | |
| Sept. 29 | Sunny | 26° /10° | 0 mm | 5 | |
| Sept. 30 |  Mist | 20° /8° | 0 mm | 5 | |
| Next | |||||
Important Notice
Our weather forecast for Wausau 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 Wausau forecast closer to your planned date for the most up-to-date weather information.
Change Month
Wausau in September - FAQ
What are the expected maximum and minimum temperatures in Wausau during September?
Enjoy moderate daytime temperatures of up to 23° and cooler nights around 11°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Wausau during September?
In September, Wausau can expect light to moderate rainfall, totaling 39.6 mm across approximately 5 days. Occasional showers are possible, and planning ahead for them could be helpful.
What are the typical wind conditions in Wausau during September?
The average wind speed in Wausau during September is 15 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Wausau
Explore the daily rainfall trends and prepare for Wausaus September weather 💧
UV exposure in Wausau during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
Quick links
More Wausau weather pages
You are here
Where is Wausau?Get accurate weather forecasts for Wausau, located at latitude 44.959 and longitude -89.63. Stay updated with localized weather information tailored for Wausau.
Found a mistake?
We appreciate your attention to details. Tell us here.