Willmar, Minnesota Weather
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Climate of Willmar: monthly averages
Based on 25 years of satellite and reanalysis data (2001-2025), July is usually the hottest month in Willmar, with average daytime highs around 29°C. January is the coolest, when nights typically fall to about -15°C and frost is possible on the coldest nights. That is a wide yearly range of roughly 44°C, so the seasons feel very different from each other.
The area receives about 700 mm of rain in a typical year. Most of it falls from June, and June is the wettest month at roughly 112 mm.
For outdoor plans and travel, May and July to September usually offer the most comfortable weather in Willmar, with mild days and relatively little rain.
| Month | Avg high | Avg low | Rainfall | Humidity |
|---|---|---|---|---|
| Jan | -5° | -15° | 13 mm | 86% |
| Feb | -3° | -14° | 21 mm | 83% |
| Mar | 6° | -6° | 37 mm | 75% |
| Apr | 14° | 1° | 68 mm | 68% |
| May | 21° | 8° | 91 mm | 67% |
| Jun | 26° | 14° | 112 mm | 70% |
| Jul | 29° | 17° | 80 mm | 66% |
| Aug | 28° | 16° | 93 mm | 66% |
| Sep | 23° | 11° | 74 mm | 67% |
| Oct | 14° | 2° | 64 mm | 72% |
| Nov | 5° | -4° | 25 mm | 77% |
| Dec | -3° | -11° | 25 mm | 86% |
Source: NASA POWER (MERRA-2 reanalysis), averaged over the roughly 50 km grid area around Willmar. Values describe typical conditions, not a forecast.
About Willmar weather
Willmar is set in Minnesota's humid continental climate, known for cold winters shaped by its northern latitude, about 141 km west of Minneapolis. Summers bring warm summers (June–August). The year winds down with very cold winters (December–February) with heavy snow. This page shows live, auto-refreshing weather for Willmar: current conditions, an hourly breakdown, a 16-day outlook, a date-lookup tool for any past or future date, and real-time air quality, sourced from Open-Meteo. Local timezone: America/Chicago.
Frequently asked questions
Willmar is about 141 km west of Minneapolis, in Minnesota.
Willmar sees very cold winters (December–February) with heavy snow.
The live current conditions, hourly forecast and 16-day outlook above are pulled in real time for Willmar's exact coordinates. No fixed schedule, the page updates whenever you load it.
July is usually the hottest month in Willmar, with average daytime highs of about 29°C and nights around 17°C.
The coldest nights come in January, when the average low is about -15°C and daytime highs reach around -5°C. Frost is possible on clear, calm nights.
Willmar receives about 700 mm of rain in a typical year. June is the wettest month at roughly 112 mm, the only month that averages more than 100 mm.
May and July to September usually offer the most comfortable weather in Willmar, with mild daytime temperatures and little rain.
In November Willmar typically sees daytime highs near 5°C and lows near -4°C, with about 25 mm of rain over the month and average humidity around 77%. Check the live forecast above for this week's actual conditions.
Up to 16 days ahead using the extended forecast and date picker above; further-out or historical dates use the same date lookup tool.
Live temperature for Willmar is shown at the top of this page and refreshes automatically — see the hourly breakdown below for how it changes through the day.
Willmar's day-to-day weather follows the broader pattern of Minnesota described above. See the hourly weather forecast or the air quality index for more detail.