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May Weather in Willmar, United States

Last updated: June 24, 2025

In May, the average temperature in Willmar, United States is a pleasant 15°C (59°F). Expect a range where the minimum dips to 1°C (33°F) and the maximum can reach a warm 34°C (93°F). With an average humidity of 76%, be prepared for a touch of moisture in the air. Don't forget your umbrella, as 107 mm (4.2 in) of precipitation is likely to fall over 12 days this month!

May Temperature in Willmar

In May in Willmar, the average temperature is 15°C (59°F). The maximum can reach 34°C (93°F), and the minimum can be as low as 1°C (33°F). Be prepared for a wide range of temperatures if you plan to travel during this month.

May Weather in Willmar: Daily Temperature Highs, Lows, and Averages

The chart illustrates May temperature patterns in Willmar, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Willmar, May typically has an average temperature of 15°C (59°F), with highs reaching up to 34°C (93°F) and lows dropping to around 1°C (33°F).
JanFebMarAprMayJunJulAugSepOctNovDec151532425872747063473223
Data source: Temperature data for Willmar generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

May Precipitation in Willmar

In Willmar in May, the precipitation amount is 107 mm (4.2 in) spread over 12 days.

May Precipitation Trends in Willmar

The chart displays monthly precipitation patterns in Willmar, with values for each month alongside May’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how May’s conditions compare to those of other months. In Willmar, May typically receives around 107 mm (4.2 inches) of precipitation spread over approximately 12 days.
JanFebMarAprMayJunJulAugSepOctNovDec2022547610792105149115962639
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in Willmar

In Willmar in May humidity is 76%. With an average temperature of 15°C (59°F), this humidity feels like a heavy blanket wrapping around you, making outdoor activities less enjoyable and often leading to a quick sense of fatigue while traveling.

May Average Humidity in Willmar

This chart illustrates the average monthly humidity levels in Willmar, with May’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In May, average humidity in Willmar is approximately 76%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec85%89%81%82%76%81%82%83%82%82%87%84%
Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in Willmar

In Willmar in May, the maximum UV index is 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For detailed information, you can check the Hourly UV Index in Willmar.

Maximum UV Index Levels in Willmar for May

The chart shows the monthly maximum UV Index (UVI) for Willmar in May, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In May, the maximum UV index in Willmar typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3567910997532
Data source: Willmar May UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

How May Weather in Willmar Compares to Other Months

Weather in Willmar varies notably across the year, with each month offering distinct climate conditions. This page compares May’s weather to other months in Willmar, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Willmar, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-10°C (15°F)20 mm (0.8 inches)85%moderate
February Weather-10°C (15°F)22 mm (0.9 inches)89%moderate
March Weather0°C (32°F)54 mm (2.1 inches)81%high
April Weather6°C (42°F)76 mm (3.0 inches)82%high
May Weather15°C (59°F)107 mm (4.2 inches)76%very high
June Weather22°C (72°F)92 mm (3.6 inches)81%very high
July Weather23°C (74°F)105 mm (4.1 inches)82%very high
August Weather21°C (70°F)149 mm (5.9 inches)83%very high
September Weather17°C (64°F)115 mm (4.5 inches)82%high
October Weather8°C (47°F)96 mm (3.8 inches)82%moderate
November Weather0°C (33°F)26 mm (1.0 inches)87%moderate
December Weather-5°C (23°F)39 mm (1.5 inches)84%low

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