| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 18°F | 30°F | 24°F | 1.2" |
| February | 25°F | 44°F | 33°F | 2.4" |
| March | 31°F | 57°F | 43°F | 1.8" |
| April | 35°F | 65°F | 50°F | 1.5" |
| May | 42°F | 75°F | 59°F | 2.6" |
| June | 49°F | 80°F | 64°F | 4.2" |
| July | 58°F | 92°F | 75°F | 1.6" |
| August | 54°F | 91°F | 73°F | 0.8" |
| September | 45°F | 78°F | 61°F | 2.2" |
| October | 37°F | 61°F | 48°F | 2.3" |
| November | 27°F | 41°F | 34°F | 3.6" |
| December | 18°F | 30°F | 25°F | 4.0" |
| Index | Malott | Washington | National |
| Air quality index | 24 | 36 | 42 |
| Pollution index | 422,626 | 4,541,850 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 298 |
| Days with moderate air quality | 66 |
| Days w/ poor A.Q. for sensitive groups | 1 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.000% |
| Benzene | 0.010% |
| Carbon Tetrachloride | 0.001% |
| Lead | 0.000% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| North Omak, WA | 410 | 24 | 52.0% |
| Methow, WA | 126 | 24 | 52.0% |
| Okanogan, WA | 2,585 | 24 | 52.0% |
| Omak, WA | 4,801 | 24 | 52.0% |
| Brewster, WA | 2,323 | 24 | 52.0% |
| Malott, WA | 736 | 24 | 52.0% |
| City | Population | Air Quality Index | National Avg. |
| Syracuse, OH | 736 | 25 | 50.0% |
| Ivy, VA | 736 | 40 | 20.0% |
| Glasgow, WV | 736 | 40 | 20.0% |
| O'Connor, ON | 736 | n/a | |
| Clyde, CA | 737 | 40 | 20.0% |
| Malott, WA | 736 | 24 | 52.0% |
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