TODAY DEC14
TEMPERATURE43
HUMIDITY86
PRESSURE29.54
WIND COND.
  • 4541Sat20%80%
  • 4844Sun100%90%
  • 5147Mon80%
  • 5448Tue
  • 5344Wed
daynightWeather update from Shelton, Shelton Sanderson Field at

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Union 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
January33°F46°F39°F10.0"
February33°F50°F41°F6.7"
March36°F54°F44°F9.7"
April37°F60°F47°F4.7"
May43°F67°F54°F3.1"
June48°F72°F58°F1.6"
July51°F79°F63°F0.8"
August51°F80°F64°F1.1"
September47°F74°F59°F3.0"
October42°F61°F50°F7.4"
November36°F51°F43°F13.6"
December32°F45°F38°F11.5"

Did you know?

  • The highest monthly average temperature in Union for August is 64 degrees.
  • The lowest monthly average temperature in Union for December is 38 degrees.
  • The most monthly precipitation in Union occurs in November with 13.6 inches.
  • The air quality index in Union is 49% better than the national average.
  • The pollution index in Union is 43% better than the national average.

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Compare Union, WA Weather To Other Cities

Union 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.
IndexUnionWashingtonNational
Air quality index253650
Pollution index2,873,3908,596,9895,066,862

Union air quality information

MeasurementTotal
Days measured336
Days with good air quality271
Days with moderate air quality65
Days w/ poor A.Q. for sensitive groups
Days with unhealthy air quality

Union air quality information

PollutantTotal
Arsenic0.010%
Benzene0.050%
Carbon Tetrachloride0.010%
Lead0.010%
Mercury0.010%

Average monthly Union temperature with heat index

Union monthly precipitation with daily maximum

Union monthly snow depth with daily maximum

Union monthly wind speed information

Nearby cities with good air quality

City, StatePopulationAir Quality IndexNational Avg.
Allyn, WA2,4771766%
Vaughn, WA5291766%
Belfair, WA3,8191766%
Grapeview, WA1,0031766%
Herron Island, WA672550%
Union, WA2892550%

Cities with similar population

City, StatePopulationAir Quality IndexNational Avg.
Adelphi, OH2893334%
Dewey Beach, DE2893628%
Elcho, WI2893628%
Juda, WI2893824%
Pulaski, IA2894020%
Union, WA2892550%
Source: The Union, 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.