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May Weather in Bellevue, United States

Last updated: June 24, 2025

In May, the average temperature in Bellevue, United States hovers around 16°C (61°F). Expect a wide range, with minimums dipping to 0°C (31°F) and maximums soaring up to 32°C (89°F). This month typically brings 125 mm (4.9 in) of precipitation over 15 days, contributing to an average humidity of 81%. Prepare for a mix of weather conditions!

May Temperature in Bellevue

In May in Bellevue, the average temperature is 16°C (61°F), with maximums reaching 32°C (89°F) and minimums dipping as low as 0°C (31°F). This variation makes it essential for travelers to pack layers and be prepared for both warm and chilly conditions.

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

The chart illustrates May temperature patterns in Bellevue, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Bellevue, May typically has an average temperature of 16°C (61°F), with highs reaching up to 32°C (89°F) and lows dropping to around 0°C (31°F).
JanFebMarAprMayJunJulAugSepOctNovDec293239496170757368574235
Data source: Temperature data for Bellevue 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 Bellevue

In Bellevue in May, the precipitation amount is 125 mm (4.9 in) over a span of 15 days.

May Precipitation Trends in Bellevue

The chart displays monthly precipitation patterns in Bellevue, 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 Bellevue, May typically receives around 125 mm (4.9 inches) of precipitation spread over approximately 15 days.
JanFebMarAprMayJunJulAugSepOctNovDec7688921111251191248375989476
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in Bellevue

In Bellevue in May, humidity is 81%. With an average temperature of 16°C (61°F), this humidity feels like a warm, heavy blanket wrapping around you as you explore the sights, making it essential to stay hydrated and take regular breaks in the shade.

May Average Humidity in Bellevue

This chart illustrates the average monthly humidity levels in Bellevue, 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 Bellevue is approximately 81%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec88%87%87%88%81%82%81%78%78%82%89%86%
Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in Bellevue

In Bellevue in May, the maximum UV index reaches 10, which corresponds to a very high Exposure Category. With a time to burn of just 15 minutes, it's crucial to take precautions. For more detailed information, you can check the Hourly UV Index in Bellevue.

Maximum UV Index Levels in Bellevue for May

The chart shows the monthly maximum UV Index (UVI) for Bellevue 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 Bellevue typically reaches 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec356910101098642
Data source: Bellevue 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 Bellevue Compares to Other Months

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

This table compares monthly weather conditions in Bellevue, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-1°C (30°F)76 mm (3.0 inches)88%moderate
February Weather0°C (32°F)87 mm (3.4 inches)87%moderate
March Weather4°C (40°F)92 mm (3.6 inches)87%high
April Weather10°C (49°F)111 mm (4.4 inches)87%very high
May Weather16°C (61°F)125 mm (4.9 inches)81%very high
June Weather21°C (71°F)119 mm (4.7 inches)82%very high
July Weather24°C (75°F)124 mm (4.9 inches)81%very high
August Weather23°C (73°F)83 mm (3.3 inches)78%very high
September Weather20°C (68°F)75 mm (2.9 inches)78%very high
October Weather14°C (57°F)98 mm (3.9 inches)82%high
November Weather5°C (42°F)93 mm (3.7 inches)89%moderate
December Weather2°C (35°F)76 mm (3.0 inches)86%low

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