| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | -1°F | 26°F | 11°F | 0.2" |
| February | 7°F | 33°F | 19°F | 0.3" |
| March | 22°F | 51°F | 35°F | 1.4" |
| April | 30°F | 62°F | 45°F | 1.7" |
| May | 40°F | 70°F | 54°F | 5.0" |
| June | 52°F | 79°F | 65°F | 7.2" |
| July | 58°F | 92°F | 75°F | 1.8" |
| August | 52°F | 88°F | 69°F | 3.1" |
| September | 42°F | 77°F | 58°F | 1.3" |
| October | 32°F | 62°F | 45°F | 2.6" |
| November | 20°F | 44°F | 31°F | 1.3" |
| December | 4°F | 28°F | 15°F | 0.4" |
| Index | Frazer | Montana | National |
| Air quality index | 34 | 34 | 42 |
| Pollution index | 348,172 | 834,473 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 309 |
| Days with moderate air quality | 53 |
| Days w/ poor A.Q. for sensitive groups | 3 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.000% |
| Benzene | 0.005% |
| Carbon Tetrachloride | 0.000% |
| Lead | 0.010% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Nashua, MT | 326 | 34 | 32.0% |
| Frazer, MT | 420 | 34 | 32.0% |
| City | Population | Air Quality Index | National Avg. |
| River Pines, CA | 420 | 52 | 4.0% |
| Victor, CA | 420 | 45 | 10.0% |
| Blanca, CO | 420 | 16 | 68.0% |
| Casey, IA | 420 | 39 | 22.0% |
| Galva, IA | 420 | 35 | 30.0% |
| Frazer, MT | 420 | 34 | 32.0% |
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