| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 9°F | 29°F | 18°F | 0.7" |
| February | 10°F | 31°F | 19°F | 1.0" |
| March | 22°F | 46°F | 32°F | 1.1" |
| April | 32°F | 59°F | 44°F | 3.5" |
| May | 43°F | 70°F | 55°F | 7.0" |
| June | 52°F | 80°F | 65°F | 5.2" |
| July | 59°F | 88°F | 72°F | 3.7" |
| August | 56°F | 86°F | 69°F | 3.6" |
| September | 46°F | 76°F | 59°F | 3.6" |
| October | 34°F | 59°F | 45°F | 2.2" |
| November | 20°F | 43°F | 30°F | 1.0" |
| December | 8°F | 27°F | 17°F | 0.8" |
| Index | East Fairview | North Dakota | National |
| Air quality index | 34 | 35 | 42 |
| Pollution index | 330,429 | 1,038,665 | 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 | 0.000% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Sidney, MT | 6,351 | 34 | 32.0% |
| Fairview, MT | 985 | 34 | 32.0% |
| East Fairview, ND | 93 | 34 | 32.0% |
| City | Population | Air Quality Index | National Avg. |
| Diomede, AK | 93 | 38 | 24.0% |
| Sun Valley, AZ | 93 | 44 | 12.0% |
| Glasgow, IL | 93 | 40 | 20.0% |
| Sims, IN | 93 | 37 | 26.0% |
| Highland Beach, MD | 93 | 46 | 8.0% |
| East Fairview, ND | 93 | 34 | 32.0% |
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