| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 26°F | 38°F | 31°F | 2.0" |
| February | 29°F | 43°F | 35°F | 1.6" |
| March | 33°F | 51°F | 40°F | 2.9" |
| April | 36°F | 58°F | 46°F | 1.8" |
| May | 42°F | 68°F | 54°F | 1.6" |
| June | 47°F | 75°F | 61°F | 1.4" |
| July | 50°F | 86°F | 69°F | 0.3" |
| August | 50°F | 86°F | 68°F | 0.4" |
| September | 44°F | 77°F | 60°F | 0.7" |
| October | 38°F | 61°F | 48°F | 1.8" |
| November | 32°F | 46°F | 39°F | 2.6" |
| December | 24°F | 36°F | 30°F | 2.5" |
| Index | Moscow | Idaho | National |
| Air quality index | 10 | 32 | 42 |
| Pollution index | 1,232,200 | 2,063,710 | 2,726,193 |
| Measurement | Total |
| Days measured | 350 |
| Days with good air quality | 350 |
| Days with moderate air quality | 0 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.000% |
| Benzene | 0.020% |
| Carbon Tetrachloride | 0.002% |
| Lead | 0.020% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Potlatch, ID | 836 | 10 | 80.0% |
| Princeton, ID | 123 | 10 | 80.0% |
| Palouse, WA | 969 | 10 | 80.0% |
| Juliaetta, ID | 511 | 10 | 80.0% |
| Troy, ID | 868 | 10 | 80.0% |
| Moscow, ID | 25,652 | 10 | 80.0% |
| City | Population | Air Quality Index | National Avg. |
| Madison, MS | 25,650 | 44 | 12.0% |
| Fairland, MD | 25,649 | 47 | 6.0% |
| Ruskin, FL | 25,640 | 38 | 24.0% |
| South Portland, ME | 25,665 | 40 | 20.0% |
| Soledad, CA | 25,667 | 37 | 26.0% |
| Moscow, ID | 25,652 | 10 | 80.0% |
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