Click on a day for an hourly weather forecast
The temperatures in Willmar in May are usually low and can range between 10°C and 19°C.
You can expect about 3 to 8 days of rain in Willmar during the month of May. It’s a good idea to bring along your umbrella so that you don’t get caught in poor weather.
Please note that Willmar can expect a few days of snow in May.
Our weather forecast can give you a great sense of what weather to expect in Willmar in May 2025.
If you’re planning to visit Willmar in the near future, we highly recommend that you review the 14 day weather forecast for Willmar before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | -8° / -15° | 2 | 14 | 16 | 17 mm | Awful | Willmar in January |
| February | -6° / -14° | 2 | 13 | 13 | 21 mm | Awful | Willmar in February |
| March | 3° / -4° | 5 | 17 | 9 | 44 mm | Awful | Willmar in March |
| April | 11° / 2° | 5 | 19 | 5 | 73 mm | Bad | Willmar in April |
| May | 19° / 10° | 7 | 24 | 1 | 84 mm | Ok | Willmar in May |
| June | 25° / 15° | 6 | 24 | 0 | 111 mm | Perfect | Willmar in June |
| July | 27° / 17° | 6 | 25 | 0 | 87 mm | Perfect | Willmar in July |
| August | 27° / 15° | 4 | 27 | 0 | 84 mm | Perfect | Willmar in August |
| September | 22° / 11° | 3 | 27 | 0 | 51 mm | Good | Willmar in September |
| October | 13° / 5° | 4 | 24 | 2 | 56 mm | Bad | Willmar in October |
| November | 4° / -2° | 3 | 20 | 7 | 25 mm | Awful | Willmar in November |
| December | -4° / -10° | 2 | 14 | 15 | 28 mm | Awful | Willmar in December |