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May Weather in Wyoming, United States

Last updated: June 24, 2025

In Wyoming, United States, the average temperature in May hovers around 17°C (63°F). Be prepared for temperature fluctuations, as it can dip to a minimum of -1°C (31°F) or soar to a maximum of 35°C (95°F). Precipitation is notable with an average of 162 mm (6.4 in) expected over 15 days, and the atmosphere tends to be quite humid, with an average humidity level of 79%.

May Temperature in Wyoming

In May in Wyoming, the average temperature is 17°C (63°F). Maximum temperatures can reach 35°C (95°F) and minimums can drop to as low as -1°C (31°F). Be prepared for a wide range of weather conditions if you're planning to travel during this time.

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 17°C (63°F), with highs reaching up to 35°C (95°F) and lows dropping to around -1°C (31°F).
JanFebMarAprMayJunJulAugSepOctNovDec252841506373777469553933
Data source: Temperature data for Wyoming 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 Wyoming

In Wyoming in May, the total precipitation amount is 162 mm (6.4 in) spread over 15 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 162 mm (6.4 inches) of precipitation spread over approximately 15 days.
JanFebMarAprMayJunJulAugSepOctNovDec586510411516215910368881335551
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in Wyoming

In Wyoming in May, humidity is 79%. With an average temperature of 17°C (63°F), this humidity feels like a warm, muggy embrace, making outdoor activities less comfortable and prompting travelers to seek shaded areas or cool refreshments more frequently.

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 79%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec82%83%84%85%79%82%80%81%80%82%88%84%
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.
JanFebMarAprMayJunJulAugSepOctNovDec35689111098642
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.
 TemperaturePrecipitationHumidityUV
January Weather-4°C (26°F)58 mm (2.3 inches)82%moderate
February Weather-2°C (28°F)65 mm (2.6 inches)83%moderate
March Weather5°C (41°F)104 mm (4.1 inches)84%high
April Weather10°C (50°F)115 mm (4.5 inches)85%very high
May Weather17°C (63°F)162 mm (6.4 inches)79%very high
June Weather23°C (74°F)159 mm (6.3 inches)82%extreme
July Weather25°C (77°F)103 mm (4.1 inches)80%very high
August Weather23°C (74°F)68 mm (2.7 inches)81%very high
September Weather21°C (69°F)88 mm (3.5 inches)80%very high
October Weather13°C (55°F)133 mm (5.2 inches)82%high
November Weather4°C (40°F)55 mm (2.2 inches)88%moderate
December Weather1°C (34°F)51 mm (2.0 inches)84%low

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