Mendon, Michigan has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 39.8 °F (low) to 58.3 °F (high). Annual precipitation averages 39.6 Inches. Mendon 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 | 17.0 °F | 31.2 °F | 2.66 in. |
| February | 18.3 °F | 34.2 °F | 2.1 in. |
| March | 26.5 °F | 45.0 °F | 2.42 in. |
| April | 37.5 °F | 58.2 °F | 3.59 in. |
| May | 49.4 °F | 69.7 °F | 4.26 in. |
| June | 58.9 °F | 78.8 °F | 4.14 in. |
| July | 61.7 °F | 82.5 °F | 3.92 in. |
| August | 59.9 °F | 80.5 °F | 4.2 in. |
| September | 52.3 °F | 74.7 °F | 3.43 in. |
| October | 41.2 °F | 61.4 °F | 3.69 in. |
| November | 31.8 °F | 47.8 °F | 2.86 in. |
| December | 23.2 °F | 36.1 °F | 2.36 in. |
| Annual | 39.8 °F | 58.3 °F | 39.63 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 6a : -10°F to -5°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |