Ypsilanti, Michigan has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 39.4 °F (low) to 59.3 °F (high). Annual precipitation averages 34.8 Inches. Ypsilanti 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 | 32.1 °F | 2.59 in. |
| February | 18.0 °F | 35.1 °F | 2.11 in. |
| March | 26.1 °F | 45.6 °F | 2.52 in. |
| April | 36.8 °F | 58.7 °F | 3.27 in. |
| May | 47.9 °F | 70.7 °F | 3.59 in. |
| June | 57.6 °F | 79.8 °F | 3.4 in. |
| July | 61.3 °F | 83.9 °F | 3.18 in. |
| August | 59.9 °F | 81.8 °F | 3.26 in. |
| September | 52.3 °F | 75.4 °F | 2.99 in. |
| October | 41.1 °F | 62.6 °F | 2.88 in. |
| November | 31.4 °F | 48.8 °F | 2.63 in. |
| December | 23.2 °F | 37.2 °F | 2.4 in. |
| Annual | 39.4 °F | 59.3 °F | 34.82 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 |