| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 5°F | 29°F | 17°F | 0.5" |
| February | 13°F | 36°F | 23°F | 0.5" |
| March | 25°F | 52°F | 36°F | 2.3" |
| April | 31°F | 58°F | 43°F | 2.7" |
| May | 41°F | 66°F | 52°F | 7.1" |
| June | 52°F | 77°F | 64°F | 8.3" |
| July | 59°F | 91°F | 74°F | 2.9" |
| August | 53°F | 86°F | 69°F | 1.7" |
| September | 44°F | 77°F | 59°F | 3.1" |
| October | 33°F | 60°F | 45°F | 1.8" |
| November | 23°F | 46°F | 33°F | 1.1" |
| December | 9°F | 30°F | 19°F | 0.8" |
| Index | Baker | Montana | National |
| Air quality index | 33 | 34 | 42 |
| Pollution index | 192,629 | 834,473 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 354 |
| Days with moderate air quality | 11 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.000% |
| Benzene | 0.001% |
| Carbon Tetrachloride | 0.000% |
| Lead | 0.000% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Plevna, MT | 311 | 33 | 34.0% |
| Baker, MT | 1,905 | 33 | 34.0% |
| City | Population | Air Quality Index | National Avg. |
| Haines, AK | 1,905 | 20 | 60.0% |
| Murfreesboro, AR | 1,905 | 32 | 36.0% |
| Cloverdale, IN | 1,905 | 42 | 16.0% |
| Burkesville, KY | 1,905 | 25 | 50.0% |
| Stratford, TX | 1,905 | 44 | 12.0% |
| Baker, MT | 1,905 | 33 | 34.0% |
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