La Crosse (WI)
September
Weather in La Crosse, Wisconsin for September 2025
Your guide to La Crosse weather in September - trends and predictions
Until now, September 2025 in La Crosse is slightly cooler than the historical average by -1.6 °F.
The forecast for the upcoming days in La Crosse predicts a temperature of 25.1 °F, which is slightly above the historical average.
In general, the average temperature in La Crosse at the beginning of September is 19.6 °F. As the month progressed, temperatures tended to significantly warm up, reaching an average of 24.9 °F by the end of September.
With an average of 4 rainy days, La Crosse 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
25°/11°
Temperatures
15 km/h
Avg max wind
72 %
Avg humidity
La Crosse Weather September
Move between months or click on a day
Temperatures trend during September in La Crosse
See the weather trend as well as the moving average line
September weather in La Crosse day by day
Click on a date for more information
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 |  Partly cloudy | 21° /10° | 0 mm | 6 | |
| Sept. 2 |  Sunny | 23° /12° | 0 mm | 6 | |
| Sept. 3 |  Mist | 20° /10° | 0 mm | 5 | |
| Sept. 4 | Sunny | 21° /8° | 8.8 mm | 5 | |
| Sept. 5 |  Patchy rain possible | 19° /9° | 0.2 mm | 5 | |
| Sept. 6 | Fog | 15° /6° | 0.3 mm | 4 | |
| Sept. 7 | Partly cloudy | 18° /3° | 0 mm | 5 | |
| Sept. 8 | Sunny | 22° /6° | 0 mm | 6 | |
| Sept. 9 | Sunny | 26° /11° | 0 mm | 6 | |
| Sept. 10 | Patchy rain possible | 26° /12° | 0.1 mm | 6 | |
| Sept. 11 | Partly cloudy | 25° /15° | 0 mm | 6 | |
| Sept. 12 | Sunny | 25° /12° | 0 mm | 6 | |
| Sept. 13 |  Overcast | 28° /15° | 0 mm | 6 | |
| Sept. 14 | Patchy rain possible | 30° /16° | 0.2 mm | 7 | |
| Sept. 15 |  Thundery outbreaks possible | 29° /16° | 2.3 mm | 6 | |
| Sept. 16 | Thundery outbreaks possible | 29° /16° | 0 mm | 1.4 | |
| Sept. 17 |  Moderate rain | 25° /15° | 5.2 mm | 1.3 | |
| Sept. 18 |  Cloudy | 26° /11° | 0 mm | 1.4 | |
| Sept. 19 | Patchy rain possible | 20° /16° | 3.2 mm | 0.5 | |
| Sept. 20 | Moderate rain | 23° /15° | 5.1 mm | 0 | |
| Sept. 21 | Moderate rain | 27° /17° | 10.9 mm | 5 | |
| Sept. 22 | Moderate rain | 23° /14° | 7.9 mm | 4 | |
| Sept. 23 | Sunny | 25° /10° | 0 mm | 5 | |
| Sept. 24 | Sunny | 26° /13° | 0 mm | 5 | |
| Sept. 25 | Sunny | 28° /14° | 0 mm | 6 | |
| Sept. 26 | Sunny | 30° /18° | 0 mm | 6 | |
| Sept. 27 | Sunny | 19° /10° | 0 mm | 4 | |
| Sept. 28 | Sunny | 23° /6° | 0 mm | 4 | |
| Sept. 29 | Patchy rain possible | 28° /13° | 0.3 mm | 4 | |
| Sept. 30 | Mist | 20° /10° | 0 mm | 5 | |
| Next | |||||
Important Notice
Our weather forecast for La Crosse 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 La Crosse forecast closer to your planned date for the most up-to-date weather information.
Change Month
La Crosse in September - FAQ
What are the expected maximum and minimum temperatures in La Crosse during September?
Enjoy moderate daytime temperatures of up to 25° and cooler nights around 11°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in La Crosse during September?
Significant rainfall exceeding 110.7 mm is expected in La Crosse during September, occurring over more than 4 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in La Crosse during September?
The average wind speed in La Crosse during September is 15 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in La Crosse
Explore the daily rainfall trends and prepare for La Crosses September weather 💧
UV exposure in La Crosse during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
Quick links
More La Crosse weather pages
You are here
Where is La Crosse?Get accurate weather forecasts for La Crosse, located at latitude 43.801 and longitude -91.24. Stay updated with localized weather information tailored for La Crosse.
Found a mistake?
We appreciate your attention to details. Tell us here.