nomadseason

May Weather in Bismarck, United States

Last updated: June 24, 2025

In May, the average temperature in Bismarck, United States hovers around 13°C (56°F). However, prepare for a range of temperatures, with minimums plunging to -4°C (26°F) and maximums soaring to 33°C (91°F). Expect approximately 47 mm (1.9 in) of precipitation over 7 days, accompanied by an average humidity of 76%. Stay ready for variable weather!

May Temperature in Bismarck

In May in Bismarck, the average temperature is 13°C (56°F), with maximums reaching up to 33°C (91°F) and minimums dropping as low as -4°C (26°F). Be prepared for a wide range of temperatures, making it essential to pack for both warm days and chilly nights while traveling.

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

The chart illustrates May temperature patterns in Bismarck, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Bismarck, May typically has an average temperature of 13°C (56°F), with highs reaching up to 33°C (91°F) and lows dropping to around -4°C (26°F).
JanFebMarAprMayJunJulAugSepOctNovDec151330405669737061443122
Data source: Temperature data for Bismarck generated using information from the Copernicus Climate Change Service.
Choose your preferred temperature unit
The average of daily temperatures (24 hours) calculated across all days in the month.

May Precipitation in Bismarck

In Bismarck in May, the total precipitation amount is 47 mm (1.9 in) recorded over a span of 7 days.

May Precipitation Trends in Bismarck

The chart displays monthly precipitation patterns in Bismarck, 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 Bismarck, May typically receives around 47 mm (1.9 inches) of precipitation spread over approximately 7 days.
JanFebMarAprMayJunJulAugSepOctNovDec131626264764655958561522
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

May Humidity in Bismarck

In Bismarck in May humidity is 76%. With an average temperature of 13°C (56°F), this humidity feels like a damp blanket enveloping you, making travel a bit uncomfortable as you navigate through the heavy, moisture-laden air.

May Average Humidity in Bismarck

This chart illustrates the average monthly humidity levels in Bismarck, 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 Bismarck is approximately 76%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec84%88%78%75%76%79%78%78%69%71%82%84%
Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in Bismarck

In Bismarck 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 Bismarck.

Maximum UV Index Levels in Bismarck for May

The chart shows the monthly maximum UV Index (UVI) for Bismarck 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 Bismarck typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec2459910997532
Data source: Bismarck 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 Bismarck Compares to Other Months

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

This table compares monthly weather conditions in Bismarck, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-10°C (15°F)12 mm (0.5 inches)84%low
February Weather-11°C (13°F)16 mm (0.6 inches)88%moderate
March Weather-1°C (30°F)26 mm (1.0 inches)78%moderate
April Weather4°C (40°F)26 mm (1.0 inches)75%very high
May Weather13°C (56°F)47 mm (1.9 inches)76%very high
June Weather21°C (69°F)64 mm (2.5 inches)79%very high
July Weather23°C (74°F)65 mm (2.6 inches)78%very high
August Weather21°C (70°F)59 mm (2.3 inches)78%very high
September Weather16°C (61°F)58 mm (2.3 inches)69%high
October Weather7°C (44°F)56 mm (2.2 inches)71%moderate
November Weather-1°C (31°F)15 mm (0.6 inches)82%moderate
December Weather-6°C (22°F)22 mm (0.9 inches)84%low

Compare Bismarck's Climate with Cities Worldwide