| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 10°F | 28°F | 20°F | 1.3" |
| February | 8°F | 29°F | 19°F | 0.7" |
| March | 16°F | 40°F | 28°F | 1.5" |
| April | 29°F | 54°F | 41°F | 2.5" |
| May | 39°F | 68°F | 54°F | 2.8" |
| June | 49°F | 77°F | 63°F | 3.4" |
| July | 53°F | 81°F | 68°F | 2.6" |
| August | 53°F | 79°F | 66°F | 3.3" |
| September | 46°F | 72°F | 59°F | 3.5" |
| October | 37°F | 58°F | 48°F | 4.7" |
| November | 28°F | 46°F | 37°F | 2.7" |
| December | 18°F | 32°F | 26°F | 1.9" |
| Index | Ironton | Michigan | National |
| Air quality index | 36 | 69 | 42 |
| Pollution index | 1,397,210 | 4,161,606 | 2,726,193 |
| Measurement | Total |
| Days measured | 247 |
| Days with good air quality | 232 |
| Days with moderate air quality | 15 |
| 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 | 0.003% |
| Lead | 0.000% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Boyne Falls, MI | 343 | 36 | 28.0% |
| Ellsworth, MI | 337 | 36 | 28.0% |
| Charlevoix, MI | 2,467 | 36 | 28.0% |
| Walloon Lake, MI | 310 | 36 | 28.0% |
| Central Lake, MI | 996 | 36 | 28.0% |
| Ironton, MI | 114 | 36 | 28.0% |
| City | Population | Air Quality Index | National Avg. |
| Ridgeville, AL | 114 | 43 | 14.0% |
| Fulton, AR | 114 | 39 | 22.0% |
| Sweet Water Village, AZ | 114 | 74 | 48.0% |
| Keomah Village, IA | 114 | 35 | 30.0% |
| Donnellson, IL | 114 | 54 | 8.0% |
| Ironton, MI | 114 | 36 | 28.0% |
Here are the best places to live in Michigan
See the best places to live in Ironton
Check out the 10 safest cities in Michigan
These are the largest cities in Michigan