Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
January | 36°F | 49°F | 42°F | 5.1" |
February | 37°F | 52°F | 44°F | 3.8" |
March | 40°F | 55°F | 47°F | 4.9" |
April | 43°F | 61°F | 51°F | 3.1" |
May | 49°F | 68°F | 57°F | 2.2" |
June | 54°F | 72°F | 62°F | 1.5" |
July | 58°F | 79°F | 67°F | 0.4" |
August | 58°F | 79°F | 68°F | 0.6" |
September | 54°F | 73°F | 62°F | 1.6" |
October | 47°F | 62°F | 54°F | 3.9" |
November | 40°F | 53°F | 47°F | 6.6" |
December | 36°F | 48°F | 41°F | 6.1" |
Index | Alki | Seattle | Washington |
Air quality index | 45 | 45 | 36 |
Pollution index | 1,081,430 | 1,081,430 | 4,541,850 |
Measurement | Total |
Days measured | 365 |
Days with good air quality | 236 |
Days with moderate air quality | 127 |
Days w/ poor A.Q. for sensitive groups | 2 |
Days with unhealthy air quality | 0 |
Pollutant | Total |
Arsenic | 0.000% |
Benzene | 0.010% |
Carbon Tetrachloride | 0.000% |
Lead | 0.000% |
Mercury | 0.000% |
City | Population | Air Quality Index | National Avg. |
Keyport, WA | 339 | 18 | 64.0% |
Southworth, WA | 2,300 | 18 | 64.0% |
Erlands Point-Kitsap Lake, WA | 3,095 | 18 | 64.0% |
Rocky Point, WA | 1,418 | 18 | 64.0% |
Bethel, WA | 4,182 | 18 | 64.0% |
Seattle, WA | 741,251 | 45 | 10.0% |
City | Population | Air Quality Index | National Avg. |
Brampton, ON | 735,754 | n/a | |
Mississauga, ON | 764,342 | n/a | |
Denver, CO | 715,878 | 58 | 16.0% |
Winnipeg, MB | 775,440 | n/a | |
Washington, DC | 701,974 | 47 | 6.0% |
Seattle, WA | 741,251 | 45 | 10.0% |