| 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 | Logan | Spokane | Washington |
| Air quality index | 43 | 43 | 36 |
| Pollution index | 408,717 | 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. |
| Airway Heights, WA | 8,885 | 43 | 14.0% |
| Medical Lake, WA | 4,950 | 43 | 14.0% |
| Mead, WA | 6,995 | 43 | 14.0% |
| Town and Country, WA | 5,402 | 43 | 14.0% |
| Cheney, WA | 12,455 | 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% |
Here are the best places to live in Washington
Safest Cities In The US
These are the 10 cheapest cities in Washington
Check out the 10 most dangerous cities in Washington