TODAY OCT21
TEMPERATURE56
HUMIDITY69
PRESSURE30.08
WIND COND.30 4.7
  • 5947Sun
  • 6148Mon
  • 6150Tue20%
  • 6052Wed
  • 6051Thu
daynightWeather update from Seattle, Seattle Boeing Field at
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Seattle 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"

Did you know?

  • The highest monthly average temperature in Seattle for August is 68 degrees.
  • The lowest monthly average temperature in Seattle for December is 41 degrees.
  • The most monthly precipitation in Seattle occurs in November with 6.6 inches.
  • The air quality index in Seattle is 1% better than the national average.
  • The pollution index in Seattle is 78% better than the national average.

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Seattle 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.
IndexSeattleWashingtonNational
Air quality index493650
Pollution index1,081,4308,596,9895,066,862

Seattle air quality information

MeasurementTotal
Days measured365
Days with good air quality195
Days with moderate air quality162
Days w/ poor A.Q. for sensitive groups8
Days with unhealthy air quality

Seattle air quality information

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

Average monthly Seattle temperature with heat index

Seattle monthly precipitation with daily maximum

Seattle monthly snow depth with daily maximum

Seattle monthly wind speed information

Nearby cities with good air quality

City, StatePopulationAir Quality IndexNational Avg.
Manchester, WA5,2421766%
Port Orchard, WA13,2651766%
Rocky Point, WA1,8011766%
Southworth, WA2,1581766%
Bethel, WA3,7641766%
Seattle, WA668,849492%

Cities with similar population

City, StatePopulationAir Quality IndexNational Avg.
Denver, CO663,303548%
El Paso, TX678,058512%
Washington, DC659,009492%
Boston, MA658,279476%
Memphis, TN655,8574412%
Seattle, WA668,849492%
Source: The Seattle, 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.