| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 6°F | 29°F | 15°F | 0.3" |
| February | 12°F | 35°F | 21°F | 0.4" |
| March | 27°F | 53°F | 37°F | 1.1" |
| April | 35°F | 63°F | 47°F | 1.4" |
| May | 44°F | 70°F | 55°F | 6.2" |
| June | 56°F | 81°F | 67°F | 5.6" |
| July | 61°F | 93°F | 75°F | 3.5" |
| August | 55°F | 89°F | 70°F | 3.0" |
| September | 45°F | 79°F | 60°F | 1.4" |
| October | 36°F | 64°F | 47°F | 4.8" |
| November | 25°F | 47°F | 34°F | 2.3" |
| December | 10°F | 32°F | 19°F | 0.5" |
| Index | Crane | Montana | National |
| Air quality index | 34 | 34 | 42 |
| Pollution index | 155,479 | 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 | 0.001% |
| Carbon Tetrachloride | 0.000% |
| Lead | 0.000% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Sidney, MT | 6,351 | 34 | 32.0% |
| Savage, MT | 234 | 34 | 32.0% |
| Crane, MT | 247 | 34 | 32.0% |
| City | Population | Air Quality Index | National Avg. |
| Moose Pass, AK | 247 | 31 | 38.0% |
| Sunizona, AZ | 247 | 45 | 10.0% |
| Norwood, GA | 247 | 47 | 6.0% |
| Dundee, IA | 247 | 39 | 22.0% |
| Easton, KS | 247 | 43 | 14.0% |
| Crane, MT | 247 | 34 | 32.0% |
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