| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 12°F | 36°F | 24°F | 1.5" |
| February | 13°F | 39°F | 26°F | 1.5" |
| March | 23°F | 49°F | 35°F | 1.8" |
| April | 29°F | 56°F | 41°F | 2.4" |
| May | 36°F | 63°F | 50°F | 4.9" |
| June | 46°F | 76°F | 61°F | 3.3" |
| July | 51°F | 86°F | 69°F | 2.5" |
| August | 48°F | 83°F | 66°F | 5.1" |
| September | 42°F | 73°F | 57°F | 2.6" |
| October | 34°F | 63°F | 47°F | 3.8" |
| November | 18°F | 46°F | 31°F | 1.6" |
| December | 10°F | 34°F | 22°F | 1.0" |
| Index | Hobson | Montana | National |
| Air quality index | 21 | 34 | 42 |
| Pollution index | 133,005 | 834,473 | 2,726,193 |
| Measurement | Total |
| Days measured | 363 |
| Days with good air quality | 350 |
| Days with moderate air quality | 12 |
| Days w/ poor A.Q. for sensitive groups | 1 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.000% |
| Benzene | 0.002% |
| Carbon Tetrachloride | 0.000% |
| Lead | 0.000% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Moore, MT | 187 | 21 | 58.0% |
| Hobson, MT | 183 | 21 | 58.0% |
| City | Population | Air Quality Index | National Avg. |
| Litchfield, CA | 183 | 46 | 8.0% |
| Dinosaur, CO | 183 | 49 | 2.0% |
| Marathon, IA | 183 | 35 | 30.0% |
| Washta, IA | 183 | 35 | 30.0% |
| Schneider, IN | 183 | 55 | 10.0% |
| Hobson, MT | 183 | 21 | 58.0% |
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