Click on a day for an hourly weather forecast
The temperatures in La Crosse in September are comfortable with low of 11°C and and high up to 22°C.
You can expect about 3 to 8 days of rain in La Crosse during the month of September. It’s a good idea to bring along your umbrella so that you don’t get caught in poor weather.
Our weather forecast can give you a great sense of what weather to expect in La Crosse in September 2025.
If you’re planning to visit La Crosse in the near future, we highly recommend that you review the 14 day weather forecast for La Crosse before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | -6° / -13° | 3 | 11 | 17 | 46 mm | Awful | La Crosse in January |
| February | -4° / -12° | 2 | 11 | 15 | 50 mm | Awful | La Crosse in February |
| March | 5° / -3° | 6 | 15 | 10 | 81 mm | Awful | La Crosse in March |
| April | 11° / 2° | 8 | 17 | 5 | 128 mm | Awful | La Crosse in April |
| May | 18° / 8° | 8 | 23 | 0 | 167 mm | Ok | La Crosse in May |
| June | 24° / 14° | 9 | 21 | 0 | 220 mm | Good | La Crosse in June |
| July | 26° / 16° | 6 | 25 | 0 | 124 mm | Perfect | La Crosse in July |
| August | 26° / 15° | 6 | 25 | 0 | 105 mm | Perfect | La Crosse in August |
| September | 22° / 11° | 5 | 25 | 0 | 105 mm | Good | La Crosse in September |
| October | 14° / 5° | 6 | 24 | 1 | 97 mm | Good | La Crosse in October |
| November | 6° / -1° | 4 | 19 | 7 | 64 mm | Awful | La Crosse in November |
| December | -2° / -8° | 4 | 13 | 14 | 73 mm | Awful | La Crosse in December |