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August Weather in Bellevue, United States

Last updated: June 24, 2025

The average temperature in Bellevue, United States during August is a pleasant 22°C (72°F). Expect a minimum of 8°C (46°F) and a maximum of 33°C (92°F). With an average humidity of 79%, you might feel a bit of mugginess. Be prepared for some rain, as precipitation totals around 71 mm (2.8 in) over 11 days.

August Temperature in Bellevue

In August in Bellevue, the average temperature is 22°C (72°F). The maximum can reach 33°C (92°F) and the minimum can be as low as 8°C (46°F). This makes it an ideal time for travelers to experience a comfortable climate while exploring the diverse attractions of Bellevue.

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

The chart illustrates August 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, August typically has an average temperature of 22°C (72°F), with highs reaching up to 33°C (92°F) and lows dropping to around 8°C (46°F).
JanFebMarAprMayJunJulAugSepOctNovDec262737476070757265533932
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.

August Precipitation in Bellevue

In Bellevue in August, the precipitation amount is 71 mm (2.8 in) distributed over 11 days.

August Precipitation Trends in Bellevue

The chart displays monthly precipitation patterns in Bellevue, with values for each month alongside August’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how August’s conditions compare to those of other months. In Bellevue, August typically receives around 71 mm (2.8 inches) of precipitation spread over approximately 11 days.
JanFebMarAprMayJunJulAugSepOctNovDec6874759114010296711011286863
Data source: Precipitation data for August generated using information from the Copernicus Climate Change Service.
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August Humidity in Bellevue

In Bellevue in August humidity is 79%. With an average temperature of 22°C (72°F), this humidity feels like you are enveloped in a warm, heavy blanket, making it feel considerably hotter and adding a layer of stickiness to your skin as you navigate through the streets.

August Average Humidity in Bellevue

This chart illustrates the average monthly humidity levels in Bellevue, with August’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In August, average humidity in Bellevue is approximately 79%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec87%87%86%87%82%81%78%79%80%82%87%86%
Data source: Humidity data for August generated using information from the Copernicus Climate Change Service.

August UV Index in Bellevue

In Bellevue in August, 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 Bellevue.

Maximum UV Index Levels in Bellevue for August

The chart shows the monthly maximum UV Index (UVI) for Bellevue in August, 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 August, the maximum UV index in Bellevue typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec24689101097532
Data source: Bellevue August 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 August 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 August’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 August’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-3°C (26°F)68 mm (2.7 inches)87%low
February Weather-3°C (27°F)74 mm (2.9 inches)87%moderate
March Weather3°C (37°F)75 mm (3.0 inches)86%high
April Weather8°C (47°F)91 mm (3.6 inches)87%very high
May Weather16°C (60°F)140 mm (5.5 inches)82%very high
June Weather21°C (70°F)102 mm (4.0 inches)81%very high
July Weather24°C (75°F)96 mm (3.8 inches)78%very high
August Weather22°C (72°F)71 mm (2.8 inches)79%very high
September Weather19°C (66°F)101 mm (4.0 inches)79%high
October Weather12°C (53°F)127 mm (5.0 inches)82%moderate
November Weather4°C (39°F)68 mm (2.7 inches)87%moderate
December Weather0°C (33°F)63 mm (2.5 inches)86%low

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