TODAY JUL22
TEMPERATURE51
HUMIDITY92
PRESSURE30.2
WIND COND.
  • 9456Mon
  • 9256Tue
  • 9258Wed
  • 8857Thu
  • 8758Fri
daynightWeather update from Olympia, Olympia Airport at

Northwest 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
January12°F64°F39°F8.4"
February13°F65°F40°F2.8"
March19°F70°F44°F5.4"
April24°F82°F47°F3.0"
May29°F92°F55°F2.6"
June36°F94°F59°F1.4"
July39°F104°F65°F0.7"
August39°F93°F63°F0.9"
September31°F92°F58°F1.4"
October21°F74°F50°F4.0"
November19°F63°F44°F10.1"
December6°F60°F37°F7.0"

Did you know?

  • The highest monthly average temperature in Northwest for July is 65 degrees.
  • The lowest monthly average temperature in Northwest for December is 37 degrees.
  • The most monthly precipitation in Northwest occurs in November with 10.1 inches.
  • The air quality index in Northwest is 37% better than the national average.
  • The pollution index in Northwest is 32% worse than the national average.

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Compare Olympia, WA Weather To Other Cities

Northwest 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.
IndexNorthwestOlympiaWashington
Air quality index313136
Pollution index6,704,3306,704,3308,596,989

Northwest air quality information

MeasurementTotal
Days measured364
Days with good air quality291
Days with moderate air quality70
Days w/ poor A.Q. for sensitive groups3
Days with unhealthy air quality

Northwest air quality information

PollutantTotal
Arsenic0.003%
Benzene0.100%
Carbon Tetrachloride0.004%
Lead0.030%
Mercury0.003%

Average monthly Northwest temperature with heat index

Northwest monthly precipitation with daily maximum

Northwest monthly snow depth with daily maximum

Northwest monthly wind speed information

Nearby cities with good air quality

City, StatePopulationAir Quality IndexNational Avg.
Oakville, WA7242452%
Tenino, WA1,7442452%
Herron Island, WA672550%
Shelton, WA9,8322550%
Anderson Island, WA1,1503138%
Olympia, WA49,6083138%

Cities with similar population

City, StatePopulationAir Quality IndexNational Avg.
Wilson, NC49,5583432%
Downers Grove, IL49,5556020%
Poway, CA49,6756122%
Logan, UT49,539476%
Ashburn, VA49,692492%
Olympia, WA49,6083138%
Source: The Northwest, Olympia, 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.