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May Weather in Pullman, United States

Last updated: June 24, 2025

In Pullman, United States, the average temperature for May hovers around 14°C (57°F), with lows dipping to 1°C (33°F) and highs reaching up to 31°C (87°F). Expect a moderate level of rainfall, averaging 52 mm (2.1 in) over approximately 7 days. Additionally, the average humidity levels are comfortably high at 77%, contributing to the region's unique climate.

May Temperature in Pullman

In May in Pullman, the average temperature is 14°C (57°F). Maximums can reach 31°C (87°F), while minimums can drop to as low as 1°C (33°F). This varied climate makes Pullman an ideal destination for travelers seeking both warm days and cool evenings.

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

The chart illustrates May temperature patterns in Pullman, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Pullman, May typically has an average temperature of 14°C (57°F), with highs reaching up to 31°C (87°F) and lows dropping to around 1°C (33°F).
JanFebMarAprMayJunJulAugSepOctNovDec333341485765747363494033
Data source: Temperature data for Pullman 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 Pullman

In Pullman in May, the precipitation amount is 52 mm (2.1 in) over the course of 7 days.

May Precipitation Trends in Pullman

The chart displays monthly precipitation patterns in Pullman, 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 Pullman, May typically receives around 52 mm (2.1 inches) of precipitation spread over approximately 7 days.
JanFebMarAprMayJunJulAugSepOctNovDec7098685752273822648285
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in Pullman

In Pullman in May, humidity is 77%. With an average temperature of 14°C (57°F), this humidity feels like a heavy blanket wrapping around you, making outdoor exploration feel muggy and leaving you craving the shade while you travel.

May Average Humidity in Pullman

This chart illustrates the average monthly humidity levels in Pullman, 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 Pullman is approximately 77%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec89%89%87%84%78%78%77%64%62%79%87%90%
Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in Pullman

In Pullman 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 Pullman.

Maximum UV Index Levels in Pullman for May

The chart shows the monthly maximum UV Index (UVI) for Pullman 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 Pullman typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec2457991097532
Data source: Pullman 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 Pullman Compares to Other Months

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

This table compares monthly weather conditions in Pullman, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather0°C (33°F)70 mm (2.8 inches)89%low
February Weather0°C (33°F)98 mm (3.9 inches)89%moderate
March Weather5°C (41°F)68 mm (2.7 inches)87%moderate
April Weather9°C (48°F)57 mm (2.2 inches)84%high
May Weather14°C (57°F)52 mm (2.1 inches)77%very high
June Weather18°C (65°F)27 mm (1.1 inches)78%very high
July Weather24°C (75°F)3 mm (0.1 inches)77%very high
August Weather23°C (74°F)8 mm (0.3 inches)64%very high
September Weather17°C (63°F)22 mm (0.9 inches)62%high
October Weather9°C (49°F)64 mm (2.5 inches)79%moderate
November Weather4°C (40°F)82 mm (3.2 inches)87%moderate
December Weather1°C (33°F)85 mm (3.3 inches)90%low

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