Willmar, MN Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Willmar, a city in Kandiyohi County, Minnesota.
Tonight
43°F
Rain
Rain likely before 10pm, then rain and patchy fog. Cloudy. Low around 43, with temperatures rising to around 46 overnight. North northwest wind around 15 mph. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.
7-day forecast for Willmar
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 43°F | Rain | 15 mph NNW | 86% |
| Wednesday | 49°F | Rain | 15 mph NNW | 96% |
| Wednesday Night | 39°F | Light Rain | 15 mph NNW | 89% |
| Thursday | 45°F | Mostly Cloudy | 10 to 15 mph N | 13% |
| Thursday Night | 32°F | Mostly Cloudy | 0 to 10 mph NNE | 0% |
| Friday | 43°F | Mostly Sunny | 0 to 5 mph ESE | 0% |
| Friday Night | 30°F | Mostly Cloudy | 0 to 5 mph S | 1% |
| Saturday | 53°F | Mostly Sunny | 5 to 10 mph SW | 2% |
| Saturday Night | 35°F | Partly Cloudy | 5 mph W | 7% |
| Sunday | 55°F | Mostly Sunny | 5 to 10 mph W | 4% |
| Sunday Night | 36°F | Partly Cloudy | 5 mph S | 0% |
| Monday | 57°F | Mostly Sunny | 5 to 15 mph WSW | 0% |
| Monday Night | 36°F | Mostly Clear | 5 to 10 mph WNW | 0% |
| Tuesday | 53°F | Mostly Sunny | 5 to 10 mph WNW | 1% |
Forecast source: National Weather Service (api.weather.gov) for Willmar (45.121, -95.059). Updated through the day.
Growing snapshot for Willmar
Last spring frost
Apr 30
First fall frost
Oct 7
Growing season
159 days
Hardiness zone
4b
More local growing data for Willmar: nearby ZIP 56201 weather · frost dates · planting calendar · Minnesota frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Willmar Wwtp, Mn (0.5 mi from Willmar). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.