Milan, Michigan has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 38.9 °F (low) to 59.1 °F (high). Annual precipitation averages 35 Inches. Milan is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 16.6 °F | 31.9 °F | 2.45 in. |
| February | 17.5 °F | 34.9 °F | 1.99 in. |
| March | 25.8 °F | 45.1 °F | 2.33 in. |
| April | 36.5 °F | 58.6 °F | 3.1 in. |
| May | 47.6 °F | 70.4 °F | 3.95 in. |
| June | 57.2 °F | 79.5 °F | 3.56 in. |
| July | 60.6 °F | 83.5 °F | 3.32 in. |
| August | 58.9 °F | 81.5 °F | 3.39 in. |
| September | 51.4 °F | 75.2 °F | 3.12 in. |
| October | 40.5 °F | 62.6 °F | 2.81 in. |
| November | 31.0 °F | 48.6 °F | 2.69 in. |
| December | 22.8 °F | 37.0 °F | 2.24 in. |
| Annual | 38.9 °F | 59.1 °F | 34.95 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 6a : -10°F to -5°F |
| Plant Hardiness Zone - 2012 | Zone 5b : -15°F to -10°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |