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Key findings

  • The highest monthly average temperature in Bellevue for August is 68 degrees
  • The lowest monthly average temperature in Bellevue for December is 41 degrees
  • The most monthly precipitation in Bellevue occurs in November with 6.6 inches
  • The air quality index in Bellevue is 10% better than the national average
  • The pollution index in Bellevue is 79% better than the national average

Compare Bellevue, WA Weather

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      Bellevue Average Temperature

      In the event that the weather data was unavailable for this city, estimates based upon nearby cities were used.
      MonthTemp. (min)Temp. (max)Temp. (avg)Precipitation
      January36°F49°F42°F5.1"
      February37°F52°F44°F3.8"
      March40°F55°F47°F4.9"
      April43°F61°F51°F3.1"
      May49°F68°F57°F2.2"
      June54°F72°F62°F1.5"
      July58°F79°F67°F0.4"
      August58°F79°F68°F0.6"
      September54°F73°F62°F1.6"
      October47°F62°F54°F3.9"
      November40°F53°F47°F6.6"
      December36°F48°F41°F6.1"

      Bellevue air quality index & pollution index

      In the event that the air quality/pollution data was unavailable for this city, estimates based upon nearby cities were used.
      IndexBellevueWashingtonNational
      Air quality index453650
      Pollution index1,081,4308,596,9895,066,862

      Bellevue air quality information

      MeasurementTotal
      Days measured365
      Days with good air quality236
      Days with moderate air quality127
      Days w/ poor A.Q. for sensitive groups2
      Days with unhealthy air quality0

      Bellevue air quality information

      PollutantTotal
      Arsenic0.000%
      Benzene0.010%
      Carbon Tetrachloride0.000%
      Lead0.000%
      Mercury0.000%

      Average monthly Bellevue temperature with heat index

      Bellevue monthly precipitation with daily maximum

      Bellevue monthly snow depth with daily maximum

      Bellevue monthly wind speed information

      Nearby cities with good air quality

      City, StatePopulationAir Quality IndexNational Avg.
      Bainbridge Island, WA23,5764510%
      Bothell West, WA19,8334510%
      Burien, WA50,1874510%
      Duvall, WA7,5344510%
      Fairwood, WA19,7244510%
      Bellevue, WA136,7184510%

      Cities with similar population

      City, StatePopulationAir Quality IndexNational Avg.
      Hampton, VA136,7894020%
      Warren, MI135,0695612%
      McAllen, TX138,4754216%
      Killeen, TX138,7454216%
      West Valley City, UT134,609512%
      Bellevue, WA136,7184510%
      Source: The Bellevue, WA weather data displayed above is derived from the NOAA (National Oceanic and Atmospheric). Air quality and pollution data is derived from the EPA (United States Environmental Protection Agency). Air quality and pollution levels measured in a particular area may not be representative of the entire county.