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 | Houghton | Kirkland | Washington |
Air quality index | 45 | 45 | 36 |
Pollution index | 43,367,400 | 43,367,400 | 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 | 0.020% |
Benzene | 0.790% |
Carbon Tetrachloride | 0.120% |
Lead | 0.210% |
Mercury | 0.180% |
City | Population | Air Quality Index | National Avg. |
Fairwood CDP (Spokane County), WA | 8,055 | 45 | 10.0% |
East Renton Highlands, WA | 12,576 | 45 | 10.0% |
Carnation, WA | 2,165 | 45 | 10.0% |
Esperance, WA | 4,410 | 45 | 10.0% |
SeaTac, WA | 29,102 | 45 | 10.0% |
Kirkland, WA | 91,146 | 45 | 10.0% |
City | Population | Air Quality Index | National Avg. |
Carson, CA | 91,354 | 72 | 44.0% |
Santa Barbara, CA | 90,911 | 44 | 12.0% |
Suffolk, VA | 91,383 | 40 | 20.0% |
Westminster, CA | 90,857 | 72 | 44.0% |
Tracy, CA | 91,462 | 45 | 10.0% |
Kirkland, WA | 91,146 | 45 | 10.0% |