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May Weather in Casselton, United States

Last updated: June 24, 2025

In Casselton, United States, the average temperature in May hovers around 14°C (57°F). Temperatures can dip as low as -4°C (25°F) and soar to a maximum of 34°C (94°F), showcasing the month’s diverse weather patterns. Expect 57 mm (2.2 in) of precipitation spread over 9 days, accompanied by an average humidity level of 75%.

May Temperature in Casselton

In May in Casselton, the average temperature is 14°C (57°F). Maximums can reach 34°C (94°F), while minimums can drop as low as -4°C (25°F). Be prepared for a wide range of temperatures during your travels, and pack accordingly!

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

The chart illustrates May temperature patterns in Casselton, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Casselton, May typically has an average temperature of 14°C (57°F), with highs reaching up to 34°C (94°F) and lows dropping to around -4°C (25°F).
JanFebMarAprMayJunJulAugSepOctNovDec111028405770736861442919
Data source: Temperature data for Casselton 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 Casselton

In Casselton in May, the total precipitation amount is 57 mm (2.2 in) over the course of 9 days.

May Precipitation Trends in Casselton

The chart displays monthly precipitation patterns in Casselton, 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 Casselton, May typically receives around 57 mm (2.2 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec172027475798748768821739
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in Casselton

In Casselton in May, humidity is 75%. With an average temperature of 14°C (57°F), this humidity feels like a damp blanket enveloping you, making outdoor activities somewhat uncomfortable and travel a bit sluggish, as the air feels heavy and the heat lingers close to your skin.

May Average Humidity in Casselton

This chart illustrates the average monthly humidity levels in Casselton, 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 Casselton is approximately 75%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec90%92%85%81%75%79%77%78%77%79%86%86%
Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in Casselton

In Casselton 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 Casselton.

Maximum UV Index Levels in Casselton for May

The chart shows the monthly maximum UV Index (UVI) for Casselton 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 Casselton typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec2457810987532
Data source: Casselton 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 Casselton Compares to Other Months

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

This table compares monthly weather conditions in Casselton, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-12°C (12°F)17 mm (0.7 inches)90%low
February Weather-12°C (11°F)20 mm (0.8 inches)92%moderate
March Weather-2°C (28°F)26 mm (1.0 inches)85%moderate
April Weather4°C (40°F)47 mm (1.9 inches)81%high
May Weather14°C (57°F)57 mm (2.2 inches)75%very high
June Weather21°C (70°F)98 mm (3.9 inches)79%very high
July Weather23°C (73°F)74 mm (2.9 inches)76%very high
August Weather20°C (69°F)87 mm (3.4 inches)78%very high
September Weather16°C (61°F)68 mm (2.7 inches)77%high
October Weather7°C (45°F)82 mm (3.2 inches)79%moderate
November Weather-2°C (29°F)17 mm (0.7 inches)86%moderate
December Weather-7°C (19°F)39 mm (1.5 inches)86%low

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