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May Weather in Walla Walla East, United States

Last updated: June 24, 2025

In May, the average temperature in Walla Walla East, United States is a pleasant 14°C (57°F). However, temperatures can vary significantly, with a minimum of -1°C (30°F) and a peak of 32°C (90°F). Expect about 48 mm (1.9 in) of precipitation spread across 9 days, and a notably high average humidity of 77%, making this month a unique blend of cool and warm conditions.

May Temperature in Walla Walla East

In May in Walla Walla East, the average temperature is 14°C (57°F). The maximum can reach 32°C (90°F) and the minimum can be as low as -1°C (30°F). This wide range of temperatures means travelers should be prepared for both warm days and cool evenings.

May Weather in Walla Walla East: Daily Temperature Highs, Lows, and Averages

The chart illustrates May temperature patterns in Walla Walla East, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Walla Walla East, May typically has an average temperature of 14°C (57°F), with highs reaching up to 32°C (90°F) and lows dropping to around -1°C (30°F).
JanFebMarAprMayJunJulAugSepOctNovDec343441485765737262494134
Data source: Temperature data for Walla Walla East 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 Walla Walla East

In Walla Walla East in May, the total precipitation amount is 48 mm (1.9 in) spread over 9 days.

May Precipitation Trends in Walla Walla East

The chart displays monthly precipitation patterns in Walla Walla East, 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 Walla Walla East, May typically receives around 48 mm (1.9 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec77125756248273825628493
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in Walla Walla East

In Walla Walla East 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 Walla Walla East

This chart illustrates the average monthly humidity levels in Walla Walla East, 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 Walla Walla East is approximately 77%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec86%86%85%83%77%81%77%60%58%75%85%87%
Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in Walla Walla East

In Walla Walla East 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 Walla Walla East.

Maximum UV Index Levels in Walla Walla East for May

The chart shows the monthly maximum UV Index (UVI) for Walla Walla East 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 Walla Walla East typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec24679101097532
Data source: Walla Walla East 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 Walla Walla East Compares to Other Months

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

This table compares monthly weather conditions in Walla Walla East, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather1°C (34°F)77 mm (3.0 inches)86%low
February Weather1°C (34°F)125 mm (4.9 inches)86%moderate
March Weather5°C (41°F)75 mm (3.0 inches)85%high
April Weather9°C (48°F)62 mm (2.4 inches)83%high
May Weather14°C (57°F)48 mm (1.9 inches)77%very high
June Weather18°C (65°F)27 mm (1.1 inches)81%very high
July Weather23°C (74°F)2 mm (0.1 inches)76%very high
August Weather22°C (72°F)8 mm (0.3 inches)60%very high
September Weather17°C (62°F)25 mm (1.0 inches)58%high
October Weather9°C (49°F)62 mm (2.4 inches)75%moderate
November Weather5°C (41°F)84 mm (3.3 inches)85%moderate
December Weather1°C (34°F)93 mm (3.7 inches)87%low

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