TODAY JUL17
TEMPERATURE89
HUMIDITY22
PRESSURE29.96
WIND COND. 5.8
  • 8360Tue
  • 7558Wed
  • 7557Thu
  • 7656Fri
  • 7858Sat
daynightWeather update from Seattle, Seattle Boeing Field at

Seattle Average Weather

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
January25°F57°F42°Fn/a
February29°F59°F44°Fn/a
March31°F64°F46°Fn/a
April36°F77°F50°Fn/a
May43°F87°F56°Fn/a
June47°F87°F59°Fn/a
July53°F91°F64°Fn/a
August53°F84°F63°Fn/a
September46°F85°F60°Fn/a
October36°F73°F54°Fn/a
November32°F64°F48°Fn/a
December22°F62°F42°Fn/a

Did you know?

  • The highest monthly average temperature in Seattle for July is 64 degrees.
  • The lowest monthly average temperature in Seattle for December is 42 degrees.
  • The most monthly precipitation in Seattle occurs in January with 0 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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Compare Seattle, WA Weather To Other Cities

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.
Bethel, WA3,7641766%
Enetai, WA2,2341766%
Keyport, WA4421766%
Lofall, WA2,2571766%
Poulsbo, WA9,8061766%
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.