Historical weather data, all-time temperature records, and monthly climate averages for Willmar, MN. Explore typical weather conditions by week for trip planning, and see how today compares to the historical record.
April 4th in Willmar runs the full gamut — the date's all-time high of 75° (1959) and low of 2° (2018) are a 73-degree spread that captures Minnesota spring in a nutshell. On average, expect a chilly 47° high and 27° low, with about a 1-in-4 chance of some precipitation and a lingering 9% shot at snow.
Willmar's weather has real teeth: the all-time high of 104° in July 1988 and the all-time low of -37° in January 1977 represent a staggering 141-degree range. A single November day in 1991 dropped 18 inches of snow, and a June storm in 1957 unleashed 6.08 inches of rain — this is a place that doesn't do things halfway.
Summer is Willmar's sweet spot, with highs peaking around 83° during the first week of July before tapering through a pleasant fall. Winters are brutally cold — January highs average just 21° — so plan accordingly if you're visiting between November and March. If you're trying to dodge rain, avoid mid-June, when the wettest stretch of the year averages 1.28 inches in a single week.