May Weather in Mandan, United States

Last updated: June 24, 2025

In May, the average temperature in Mandan, United States hovers around 13°C (56°F), with a range that can drop to a chilly -3°C (26°F) and soar to a warm 32°C (90°F). Expect about 52 mm (2.0 in) of precipitation spread over approximately 6 days, contributing to a relatively high average humidity of 76%. Perfect for those who enjoy mild weather with a touch of moisture!

May Temperature in Mandan

In May in Mandan, the average temperature is 13°C (56°F), with maximums reaching 32°C (90°F) and minimums dropping as low as -3°C (26°F). Travelers should be prepared for a wide range of temperatures, making layers essential for comfort.

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

The chart illustrates May temperature patterns in Mandan, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Mandan, May typically has an average temperature of 13°C (56°F), with highs reaching up to 32°C (90°F) and lows dropping to around -3°C (26°F).

Data source: Temperature data for Mandan generated using information from the Copernicus Climate Change Service.

May Precipitation in Mandan

In Mandan, in May, the precipitation amount is 52 mm (2.0 in) over the course of 6 days.

May Precipitation Trends in Mandan

The chart displays monthly precipitation patterns in Mandan, 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 Mandan, May typically receives around 52 mm (2.0 inches) of precipitation spread over approximately 6 days.

Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

May Humidity in Mandan

In Mandan 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 Mandan

This chart illustrates the average monthly humidity levels in Mandan, 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 Mandan is approximately 76%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in Mandan

In Mandan in May, the maximum UV index is 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to the Hourly UV Index in Mandan.

Maximum UV Index Levels in Mandan for May

The chart shows the monthly maximum UV Index (UVI) for Mandan 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 Mandan typically reaches 8, which falls under the very high exposure category.

Data source: Mandan 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 Mandan Compares to Other Months

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

This table compares monthly weather conditions in Mandan, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-9°C (16°F)	12 mm (0.5 inches)	84%	low
February Weather	-10°C (14°F)	16 mm (0.6 inches)	88%	moderate
March Weather	-1°C (30°F)	26 mm (1.0 inches)	78%	moderate
April Weather	4°C (40°F)	27 mm (1.1 inches)	75%	very high
May Weather	13°C (56°F)	52 mm (2.0 inches)	76%	very high
June Weather	20°C (69°F)	63 mm (2.5 inches)	79%	very high
July Weather	23°C (74°F)	62 mm (2.4 inches)	78%	very high
August Weather	21°C (70°F)	60 mm (2.4 inches)	78%	very high
September Weather	16°C (61°F)	56 mm (2.2 inches)	69%	high
October Weather	6°C (44°F)	56 mm (2.2 inches)	71%	moderate
November Weather	-1°C (31°F)	16 mm (0.6 inches)	82%	moderate
December Weather	-6°C (22°F)	22 mm (0.9 inches)	84%	low