Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
January | 25°F | 38°F | 31°F | 2.0" |
February | 28°F | 43°F | 34°F | 1.4" |
March | 32°F | 52°F | 41°F | 2.4" |
April | 36°F | 61°F | 47°F | 1.3" |
May | 43°F | 72°F | 57°F | 1.2" |
June | 50°F | 78°F | 64°F | 2.0" |
July | 57°F | 90°F | 73°F | 0.5" |
August | 55°F | 88°F | 71°F | 0.4" |
September | 47°F | 78°F | 61°F | 0.6" |
October | 39°F | 62°F | 49°F | 1.7" |
November | 32°F | 47°F | 39°F | 2.0" |
December | 25°F | 37°F | 30°F | 2.4" |
Index | Rockwood | Spokane | Washington |
Air quality index | 43 | 43 | 36 |
Pollution index | 2,233,350 | 2,233,350 | 4,541,850 |
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 | 0.002% |
Benzene | 0.030% |
Carbon Tetrachloride | 0.002% |
Lead | 0.003% |
Mercury | 0.001% |
City | Population | Air Quality Index | National Avg. |
Fairchild AFB, WA | 3,464 | 43 | 14.0% |
Green Bluff, WA | 366 | 43 | 14.0% |
Otis Orchards-East Farms, WA | 5,968 | 43 | 14.0% |
Town and Country, WA | 5,402 | 43 | 14.0% |
Four Lakes, WA | 515 | 43 | 14.0% |
Spokane, WA | 219,185 | 43 | 14.0% |
City | Population | Air Quality Index | National Avg. |
Spring Valley, NV | 218,697 | 54 | 8.0% |
San Bernardino, CA | 216,784 | 89 | 78.0% |
Baton Rouge, LA | 222,191 | 45 | 10.0% |
Richmond, BC | 222,489 | n/a | |
Tacoma, WA | 215,766 | 18 | 64.0% |
Spokane, WA | 219,185 | 43 | 14.0% |