| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 7°F | 24°F | 16°F | 1.7" |
| February | 8°F | 27°F | 17°F | 0.3" |
| March | 17°F | 41°F | 28°F | 1.3" |
| April | 28°F | 57°F | 42°F | 1.4" |
| May | 41°F | 68°F | 54°F | 1.4" |
| June | 52°F | 81°F | 67°F | 4.3" |
| July | 54°F | 83°F | 69°F | 4.5" |
| August | 54°F | 80°F | 67°F | 4.1" |
| September | 48°F | 75°F | 61°F | 4.4" |
| October | 41°F | 61°F | 49°F | 7.3" |
| November | 23°F | 40°F | 32°F | 1.4" |
| December | 11°F | 27°F | 20°F | 1.8" |
| Index | Gaastra | Michigan | National |
| Air quality index | 8 | 69 | 42 |
| Pollution index | 1,717,800 | 4,161,606 | 2,726,193 |
| Measurement | Total |
| Days measured | 59 |
| Days with good air quality | 59 |
| Days with moderate air quality | 0 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.001% |
| Benzene | 0.010% |
| Carbon Tetrachloride | 0.000% |
| Lead | 0.000% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Caspian, MI | 491 | 8 | 84.0% |
| Crystal Falls, MI | 1,626 | 8 | 84.0% |
| Alpha, MI | 192 | 8 | 84.0% |
| Amasa, MI | 242 | 8 | 84.0% |
| Iron River, MI | 2,831 | 8 | 84.0% |
| Gaastra, MI | 330 | 8 | 84.0% |
| City | Population | Air Quality Index | National Avg. |
| Coffeeville, AL | 330 | 36 | 28.0% |
| Strong, AR | 330 | 35 | 30.0% |
| Littlefield, AZ | 330 | 44 | 12.0% |
| So-Hi, AZ | 330 | 13 | 74.0% |
| Kawela Bay, HI | 330 | 30 | 40.0% |
| Gaastra, MI | 330 | 8 | 84.0% |
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