TODAY JAN19
TEMPERATURE46
HUMIDITY64
PRESSURE
WIND COND.15 3.1
  • 504030%50%
  • 4741Tue90%80%
  • 4743Wed70%
  • 5146Thu
  • 5245Fri
daynightWeather update from EB I-90 SR-18 Echo Lake at
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Sammamish 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°F48°F41°F4.7"
February37°F51°F44°F3.2"
March40°F55°F46°F4.5"
April43°F61°F50°F2.9"
May48°F68°F57°F2.1"
June53°F73°F62°F1.6"
July58°F80°F67°F0.5"
August58°F80°F67°F0.9"
September53°F73°F62°F1.8"
October47°F62°F53°F3.9"
November40°F53°F46°F5.7"
December36°F47°F41°F4.5"

Did you know?

  • The highest monthly average temperature in Sammamish for August is 67 degrees.
  • The lowest monthly average temperature in Sammamish for December is 41 degrees.
  • The most monthly precipitation in Sammamish occurs in November with 5.7 inches.
  • The air quality index in Sammamish is 1% better than the national average.
  • The pollution index in Sammamish is 756% worse than the national average.

Compare Sammamish, WA Weather To Other Cities

Sammamish 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.
IndexSammamishWashingtonNational
Air quality index493650
Pollution index43,367,4008,596,9895,066,862

Sammamish 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

Sammamish air quality information

PollutantTotal
Arsenic0.020%
Benzene0.790%
Carbon Tetrachloride0.120%
Lead0.210%
Mercury0.180%

Average monthly Sammamish temperature with heat index

Sammamish monthly precipitation with daily maximum

Sammamish monthly snow depth with daily maximum

Sammamish monthly wind speed information

Nearby cities with good air quality

City, StatePopulationAir Quality IndexNational Avg.
Ames Lake, WA1,506492%
Bothell East, WA10,064492%
Bryn Mawr-Skyway, WA17,014492%
Cottage Lake, WA23,845492%
Esperance, WA3,868492%
Sammamish, WA62,136492%

Cities with similar population

City, StatePopulationAir Quality IndexNational Avg.
Poinciana, FL62,1453628%
North Miami, FL62,1584118%
Coon Rapids, MN62,1594412%
Encinitas, CA62,1606122%
Hamilton, OH62,259548%
Sammamish, WA62,136492%
Source: The Sammamish, 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.
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