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May Weather in Ellensburg, United States

Last updated: June 24, 2025

The average temperature in Ellensburg, United States during May is a comfortable 13°C (56°F). However, be prepared for a range, as temperatures can drop to a chilly 0°C (32°F) or rise to a warm 30°C (86°F). During this month, expect about 23 mm (0.9 in) of precipitation spread over 6 days, with an average humidity level of 81%. Stay prepared for various weather conditions!

May Temperature in Ellensburg

In May in Ellensburg, the average temperature is 13°C (56°F). Maximums can reach 30°C (86°F), while minimums can drop as low as 0°C (32°F). This wide range of temperatures makes it essential for travelers to pack appropriately for both warm and cold conditions.

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

The chart illustrates May temperature patterns in Ellensburg, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Ellensburg, May typically has an average temperature of 13°C (56°F), with highs reaching up to 30°C (86°F) and lows dropping to around 0°C (32°F).
JanFebMarAprMayJunJulAugSepOctNovDec293138465662696960463631
Data source: Temperature data for Ellensburg 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 Ellensburg

In Ellensburg in May, the precipitation amount is 23 mm (0.9 in) spread over 6 days.

May Precipitation Trends in Ellensburg

The chart displays monthly precipitation patterns in Ellensburg, 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 Ellensburg, May typically receives around 23 mm (0.9 inches) of precipitation spread over approximately 6 days.
JanFebMarAprMayJunJulAugSepOctNovDec7575443823132524535872
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in Ellensburg

In Ellensburg in May, humidity is 81%. With an average temperature of 13°C (56°F), this humidity feels like a blanket of damp air that clings to your skin, making it essential to pack breathable clothing and stay hydrated while exploring.

May Average Humidity in Ellensburg

This chart illustrates the average monthly humidity levels in Ellensburg, 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 Ellensburg is approximately 81%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec86%86%87%84%81%82%79%63%62%83%89%88%
Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in Ellensburg

In Ellensburg 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 Ellensburg.

Maximum UV Index Levels in Ellensburg for May

The chart shows the monthly maximum UV Index (UVI) for Ellensburg 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 Ellensburg typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec24679101098532
Data source: Ellensburg 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 Ellensburg Compares to Other Months

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

This table compares monthly weather conditions in Ellensburg, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-2°C (29°F)75 mm (2.9 inches)86%low
February Weather-1°C (31°F)75 mm (3.0 inches)86%moderate
March Weather3°C (38°F)44 mm (1.7 inches)87%high
April Weather8°C (46°F)38 mm (1.5 inches)84%high
May Weather13°C (56°F)23 mm (0.9 inches)81%very high
June Weather17°C (63°F)13 mm (0.5 inches)82%very high
July Weather21°C (70°F)1 mm (0.1 inches)79%very high
August Weather21°C (69°F)5 mm (0.2 inches)63%very high
September Weather15°C (60°F)24 mm (1.0 inches)62%very high
October Weather8°C (46°F)53 mm (2.1 inches)83%moderate
November Weather2°C (37°F)58 mm (2.3 inches)89%moderate
December Weather-1°C (31°F)72 mm (2.8 inches)88%low

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