Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
January | 21°F | 35°F | 28°F | 3.5" |
February | 24°F | 40°F | 31°F | 1.7" |
March | 27°F | 48°F | 36°F | 2.0" |
April | 32°F | 58°F | 44°F | 1.8" |
May | 38°F | 69°F | 53°F | 1.6" |
June | 45°F | 75°F | 59°F | 2.6" |
July | 49°F | 87°F | 69°F | 0.6" |
August | 47°F | 86°F | 66°F | 0.8" |
September | 39°F | 77°F | 57°F | 0.7" |
October | 31°F | 57°F | 43°F | 2.3" |
November | 28°F | 43°F | 35°F | 3.0" |
December | 18°F | 32°F | 25°F | 4.1" |
Index | Chewelah | Washington | National |
Air quality index | 43 | 36 | 42 |
Pollution index | 2,800,290 | 4,541,850 | 2,726,193 |
Measurement | Total |
Days measured | 365 |
Days with good air quality | 252 |
Days with moderate air quality | 111 |
Days w/ poor A.Q. for sensitive groups | 2 |
Days with unhealthy air quality | 0 |
Pollutant | Total |
Arsenic | 0.020% |
Benzene | 0.040% |
Carbon Tetrachloride | 0.004% |
Lead | 0.020% |
Mercury | 0.001% |
City | Population | Air Quality Index | National Avg. |
Loon Lake, WA | 689 | 43 | 14.0% |
Valley, WA | 122 | 43 | 14.0% |
Addy, WA | 40 | 43 | 14.0% |
Chewelah, WA | 2,645 | 43 | 14.0% |
City | Population | Air Quality Index | National Avg. |
Big Coppitt Key, FL | 2,644 | 34 | 32.0% |
Rio Hondo, TX | 2,644 | 44 | 12.0% |
Sainte-Croix, QC | 2,644 | n/a | |
West Portsmouth, OH | 2,646 | 14 | 72.0% |
Eutaw, AL | 2,643 | 35 | 30.0% |
Chewelah, WA | 2,645 | 43 | 14.0% |