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Monthly climate in Willmar, Minnesota, United States

Last updated: March 2, 2024

Under the Köppen–Geiger climate classification Willmar features a humid continental climate (Dfb). Temperatures typically range between -10 °C (15 °F) and 23 °C (74 °F) through the year, but rarely can drop to -35 °C (-31 °F) or can rise to as high as 40 °C (104 °F). The average annual precipitation amounts to about 899 mm (35.4 inches) and receives 97 rainy days on the 1 mm (0.04 inches) threshold annually. Willmar enjoys an average of 2985 hours of sunshine throughout the year, and daylight varies from 8 hours 48 minutes to 15 hours 33 minutes per day.

Monthly average temperatures in Willmar, Minnesota, United States §

The warmest months in Willmar are June, July and August, with daily mean temperatures ranging from 21 to 23 °C (70 - 74 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from -10 to -5 °C (15 - 23 °F) throughout the day. On average each year, Willmar experiences 72 days above 25 °C (77.0 °F) and 147 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Willmar, Minnesota, United States. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Maximum 8°C
(47°F)		 17°C
(63°F)		 25°C
(77°F)		 30°C
(86°F)		 34°C
(93°F)		 40°C
(104°F)		 36°C
(97°F)		 34°C
(93°F)		 33°C
(91°F)		 29°C
(84°F)		 26°C
(80°F)		 13°C
(55°F)
Mean maximum 5°C
(41°F)		 8°C
(46°F)		 18°C
(64°F)		 25°C
(77°F)		 30°C
(87°F)		 33°C
(91°F)		 34°C
(93°F)		 31°C
(88°F)		 31°C
(89°F)		 27°C
(81°F)		 17°C
(62°F)		 9°C
(48°F)
Average high -6°C
(22°F)		 -5°C
(24°F)		 4°C
(40°F)		 11°C
(52°F)		 20°C
(68°F)		 27°C
(81°F)		 28°C
(83°F)		 26°C
(79°F)		 23°C
(73°F)		 13°C
(56°F)		 5°C
(41°F)		 -1°C
(30°F)
Daily mean -10°C
(15°F)		 -10°C
(15°F)		 -0°C
(32°F)		 6°C
(42°F)		 15°C
(59°F)		 22°C
(72°F)		 23°C
(74°F)		 21°C
(70°F)		 17°C
(64°F)		 8°C
(47°F)		 0°C
(33°F)		 -5°C
(23°F)
Average low -14°C
(8°F)		 -14°C
(6°F)		 -5°C
(24°F)		 0°C
(33°F)		 9°C
(49°F)		 16°C
(62°F)		 18°C
(65°F)		 16°C
(61°F)		 12°C
(54°F)		 4°C
(40°F)		 -4°C
(25°F)		 -9°C
(16°F)
Mean minimum -27°C
(-17°F)		 -27°C
(-17°F)		 -17°C
(2°F)		 -9°C
(16°F)		 2°C
(36°F)		 11°C
(51°F)		 12°C
(54°F)		 10°C
(50°F)		 4°C
(39°F)		 -6°C
(21°F)		 -14°C
(7°F)		 -24°C
(-10°F)
Minimum -35°C
(-30°F)		 -35°C
(-31°F)		 -28°C
(-18°F)		 -17°C
(2°F)		 1°C
(33°F)		 8°C
(47°F)		 11°C
(53°F)		 9°C
(48°F)		 1°C
(34°F)		 -15°C
(5°F)		 -16°C
(3°F)		 -26°C
(-15°F)

Compare climate in Willmar with other places

Compare temperature, precipitation, sunshine, UV index in Willmar, Minnesota, United States with other places around the world.

Monthly average precipitation in Willmar, Minnesota, United States §

Willmar usually has the most precipitation in May, August and September, with an average of 10 rainy days and 123 mm (4.9 inches) of precipitation per month. The driest months in Willmar are January, February and November. On average, 22 mm (0.9 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Willmar, Minnesota, United States. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Average precipitation mm (inches) 20 (0.8) 22 (0.9) 54 (2.1) 76 (3.0) 107 (4.2) 92 (3.6) 105 (4.1) 149 (5.9) 115 (4.5) 96 (3.8) 26 (1.0) 39 (1.5)
Average precipitation days (≥ 1 mm) 4 5 6 9 12 9 10 11 9 10 6 6

Monthly sunshine hours in Willmar, Minnesota, United States §

The sunniest months in Willmar are June, July and August, when the sun shines an average of 11 hours 16 minutes a day. Least sunny months in Willmar: January, November and December receive an average of 5 hours 29 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Willmar, Minnesota, United States. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Mean monthly sunshine hours 142 202 237 246 294 352 361 323 252 208 185 178
Mean daily daylight hours 9h 11m 10h 25m 11h 57m 13h 32m 14h 52m 15h 33m 15h 11m 13h 59m 12h 27m 10h 53m 9h 30m 8h 48m

Solar UV radiation in Willmar, Minnesota, United States §

Willmar experiences the highest level of ultraviolet (UV) radiation in May, June and August, when the maximum UV index can reach values of 9 - 10, which corresponds to the Very High category of sun exposure. January, November and December are in the Low / Moderate exposure category. In these months, the maximum values of the UV index do not exceed 3. For more detailed information, check out our hourly Willmar UV Index data.

Average daily maximum UV levels by month for Willmar, Minnesota, United States. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
UV Index (month maximum) 3 5 6 7 9 10 9 9 7 5 3 2

Detailed Monthly Weather Insights for Willmar, Minnesota, United States

Discover in-depth weather details for every month in Willmar. Click through the links below for comprehensive overviews of temperature trends, precipitation levels, sunshine hours, and solar UV radiation specifics. Whether planning a visit or simply curious about Willmar's climate nuances, these monthly breakdowns provide the information you need for an informed understanding of what to expect throughout the year.

Each link leads to a detailed account of the typical weather conditions for that month, providing both locals and tourists with vital information to plan their daily activities, wardrobe, and travel itineraries accordingly.