| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | -2°F | 55°F | 30°F | 2.2" |
| February | 6°F | 61°F | 34°F | 0.9" |
| March | 2°F | 67°F | 40°F | 1.8" |
| April | 25°F | 79°F | 47°F | 1.0" |
| May | 30°F | 94°F | 57°F | 1.6" |
| June | 38°F | 99°F | 63°F | 1.8" |
| July | 43°F | 104°F | 73°F | 0.6" |
| August | 43°F | 104°F | 70°F | 0.5" |
| September | 35°F | 95°F | 60°F | 0.5" |
| October | 17°F | 86°F | 47°F | 1.2" |
| November | 7°F | 63°F | 38°F | 1.9" |
| December | -3°F | 61°F | 28°F | 2.8" |
| Index | Liberty Lake | Washington | National |
| Air quality index | 39 | 36 | 50 |
| Pollution index | 408,717 | 8,596,989 | 5,066,862 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 257 |
| Days with moderate air quality | 106 |
| Days w/ poor A.Q. for sensitive groups | 1 |
| Days with unhealthy air quality | 1 |
| Pollutant | Total |
| Arsenic | 0.000% |
| Benzene | 0.010% |
| Carbon Tetrachloride | 0.000% |
| Lead | 0.001% |
| Mercury | 0.000% |
| City, State | Population | Air Quality Index | National Avg. |
| Harrison, ID | 195 | 39 | 22% |
| Post Falls, ID | 30,157 | 39 | 22% |
| Country Homes, WA | 5,745 | 39 | 22% |
| Otis Orchards-East Farms, WA | 6,399 | 39 | 22% |
| Hauser, ID | 742 | 39 | 22% |
| Liberty Lake, WA | 8,566 | 39 | 22% |
| City, State | Population | Air Quality Index | National Avg. |
| Greenbriar, VA | 8,568 | 49 | 2% |
| Southside, AL | 8,563 | 35 | 30% |
| Picture Rocks, AZ | 8,562 | 46 | 8% |
| Farmville, VA | 8,562 | 275 | 450% |
| Congers, NY | 8,562 | 53 | 6% |
| Liberty Lake, WA | 8,566 | 39 | 22% |