May Weather in Williston, United States

Last updated: June 24, 2025

In May, the average temperature in Williston, United States is a pleasant 23°C (74°F). However, you might experience a minimum of 6°C (43°F) and a peak of 38°C (101°F). Expect around 102 mm (4.0 in) of precipitation spread over 9 days, complemented by an average humidity of 75%. Stay prepared to fully enjoy your time!

May Temperature in Williston

In May in Williston, the average temperature is 23°C (74°F). Maximums can reach 38°C (101°F) and minimums can be as low as 6°C (43°F). This makes it an ideal time for travelers to enjoy a variety of outdoor activities while being prepared for both warm and cooler conditions.

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 23°C (74°F), with highs reaching up to 38°C (101°F) and lows dropping to around 6°C (43°F).

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

May Precipitation in Williston

In Williston in May, the total precipitation amount is 102 mm (4.0 in) over a span 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 102 mm (4.0 inches) of precipitation spread over approximately 9 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 Williston

In Williston in May, humidity is 75%. With an average temperature of 23°C (74°F), this humidity feels like a warm, heavy blanket wrapping around you, making it feel more sweltering than it actually is, which can be quite uncomfortable for traveling.

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.

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.

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.
	Temperature	Precipitation	Humidity	UV
January Weather	9°C (49°F)	88 mm (3.4 inches)	86%	moderate
February Weather	12°C (54°F)	110 mm (4.3 inches)	81%	high
March Weather	15°C (59°F)	81 mm (3.2 inches)	81%	very high
April Weather	18°C (66°F)	117 mm (4.6 inches)	79%	very high
May Weather	23°C (74°F)	102 mm (4.0 inches)	75%	extreme
June Weather	26°C (79°F)	111 mm (4.4 inches)	75%	extreme
July Weather	28°C (82°F)	143 mm (5.6 inches)	80%	extreme
August Weather	27°C (81°F)	144 mm (5.7 inches)	81%	extreme
September Weather	25°C (78°F)	78 mm (3.1 inches)	83%	very high
October Weather	21°C (69°F)	78 mm (3.1 inches)	78%	very high
November Weather	13°C (55°F)	60 mm (2.4 inches)	85%	high
December Weather	11°C (51°F)	122 mm (4.8 inches)	87%	moderate