May Weather in Wyoming, United States

Last updated: June 24, 2025

In Wyoming, United States, the average temperature in May hovers around 15°C (60°F). Expect a wide temperature range, with minimums dipping to -3°C (28°F) and maximums soaring to 34°C (94°F). This month also brings 138 mm (5.4 in) of precipitation, typically spread over 14 days, and the air is quite humid, with an average humidity of 82%.

May Temperature in Wyoming

In May in Wyoming, the average temperature is 15°C (60°F), with maximums reaching up to 34°C (94°F) and minimums dipping as low as -3°C (28°F). It's a month of diverse weather, so travelers should be prepared for varying conditions.

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

The chart illustrates May temperature patterns in Wyoming, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Wyoming, May typically has an average temperature of 15°C (60°F), with highs reaching up to 34°C (94°F) and lows dropping to around -3°C (28°F).

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

May Precipitation in Wyoming

In Wyoming in May, the total precipitation amount is 138 mm (5.4 in) over a span of 14 days.

May Precipitation Trends in Wyoming

The chart displays monthly precipitation patterns in Wyoming, 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 Wyoming, May typically receives around 138 mm (5.4 inches) of precipitation spread over approximately 14 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 Wyoming

In Wyoming in May humidity is 82%. With an average temperature of 15°C (60°F), this humidity feels like a heavy blanket wrapping around you, making outdoor activities feel sticky and draining, which can hinder your travel experience.

May Average Humidity in Wyoming

This chart illustrates the average monthly humidity levels in Wyoming, 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 Wyoming is approximately 82%, 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 Wyoming

In Wyoming 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 Wyoming.

Maximum UV Index Levels in Wyoming for May

The chart shows the monthly maximum UV Index (UVI) for Wyoming 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 Wyoming typically reaches 9, which falls under the very high exposure category.

Data source: Wyoming 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 Wyoming Compares to Other Months

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

This table compares monthly weather conditions in Wyoming, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-3°C (26°F)	64 mm (2.5 inches)	87%	low
February Weather	-3°C (27°F)	70 mm (2.7 inches)	87%	moderate
March Weather	3°C (37°F)	67 mm (2.6 inches)	86%	moderate
April Weather	8°C (46°F)	91 mm (3.6 inches)	87%	very high
May Weather	15°C (60°F)	138 mm (5.4 inches)	82%	very high
June Weather	21°C (70°F)	119 mm (4.7 inches)	81%	very high
July Weather	24°C (75°F)	65 mm (2.6 inches)	78%	very high
August Weather	22°C (72°F)	73 mm (2.9 inches)	79%	very high
September Weather	19°C (66°F)	111 mm (4.4 inches)	79%	high
October Weather	12°C (53°F)	130 mm (5.1 inches)	82%	moderate
November Weather	4°C (39°F)	63 mm (2.5 inches)	87%	moderate
December Weather	0°C (32°F)	67 mm (2.6 inches)	86%	low