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May Weather in Williston, United States

Last updated: June 24, 2025

In May, the average temperature in Williston, United States is a pleasant 25°C (77°F). However, temperatures can vary significantly, with minimums dropping to 9°C (48°F) and soaring up to a sizzling 38°C (100°F). Expect about 96 mm (3.8 in) of precipitation spread over 9 days, contributing to an average humidity level of 75%. Stay prepared for diverse weather!

May Temperature in Williston

In May in Williston, the average temperature is 25°C (77°F), with maximums reaching 38°C (100°F) and minimums dropping as low as 9°C (48°F). This makes it a great time for travelers looking to enjoy warm weather while also being prepared for cooler evenings.

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

The chart illustrates May temperature patterns in Williston, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Williston, May typically has an average temperature of 25°C (77°F), with highs reaching up to 38°C (100°F) and lows dropping to around 9°C (48°F).
JanFebMarAprMayJunJulAugSepOctNovDec576365707780818180756460
Data source: Temperature data for Williston 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 Williston

In Williston in May, the total precipitation amount is 96 mm (3.8 in) spread over a period of 9 days.

May Precipitation Trends in Williston

The chart displays monthly precipitation patterns in Williston, 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 Williston, May typically receives around 96 mm (3.8 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec5163347796168183194125775690
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in Williston

In Williston in May humidity is 75%. With an average temperature of 25°C (77°F), this humidity feels like a warm blanket, enveloping you and making travel somewhat taxing, as every step can feel heavier and the air thicker, often leading to a desire for shade and cool breezes.

May Average Humidity in Williston

This chart illustrates the average monthly humidity levels in Williston, 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 Williston is approximately 75%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec83%82%78%77%75%76%79%78%83%81%83%86%
Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in Williston

In Williston in May, the maximum UV index reaches 11, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's essential to take precautions. For more details, you can check the Hourly UV Index in Williston.

Maximum UV Index Levels in Williston for May

The chart shows the monthly maximum UV Index (UVI) for Williston 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 Williston typically reaches 11, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec589111111111110975
Data source: Williston 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 Williston Compares to Other Months

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

This table compares monthly weather conditions in Williston, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather14°C (57°F)51 mm (2.0 inches)83%moderate
February Weather17°C (63°F)63 mm (2.5 inches)82%very high
March Weather19°C (66°F)34 mm (1.3 inches)78%very high
April Weather21°C (71°F)77 mm (3.0 inches)77%extreme
May Weather25°C (77°F)96 mm (3.8 inches)75%extreme
June Weather27°C (80°F)168 mm (6.6 inches)76%extreme
July Weather27°C (81°F)183 mm (7.2 inches)79%extreme
August Weather27°C (81°F)194 mm (7.6 inches)78%extreme
September Weather27°C (80°F)125 mm (4.9 inches)83%very high
October Weather24°C (76°F)77 mm (3.0 inches)81%very high
November Weather18°C (65°F)56 mm (2.2 inches)83%high
December Weather15°C (60°F)90 mm (3.6 inches)86%moderate

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