TODAY OCT23
TEMPERATURE54
HUMIDITY77
PRESSURE29.93
WIND COND.140 9.2
  • 5951Wed30%
  • 5752Thu70%80%
  • 6047Fri80%
  • 5650Sat
  • 5949Sun
daynightWeather update from Seattle, Seattle Boeing Field at
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South Lake 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
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 South Lake Union for August is 68 degrees.
  • The lowest monthly average temperature in South Lake Union for December is 41 degrees.
  • The most monthly precipitation in South Lake Union occurs in November with 6.6 inches.
  • The air quality index in South Lake Union is 1% better than the national average.
  • The pollution index in South Lake Union is 78% better than the national average.

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South Lake 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.
IndexSouth Lake UnionSeattleWashington
Air quality index494936
Pollution index1,081,4301,081,4308,596,989

South Lake Union 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

South Lake Union air quality information

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

Average monthly South Lake Union temperature with heat index

South Lake Union monthly precipitation with daily maximum

South Lake Union monthly snow depth with daily maximum

South Lake Union monthly wind speed information

Nearby cities with good air quality

City, StatePopulationAir Quality IndexNational Avg.
Bethel, WA3,7641766%
Enetai, WA2,2341766%
Manchester, WA5,2421766%
Port Orchard, WA13,2651766%
Bremerton, WA39,3881766%
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 South Lake Union, 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.