Ravenna, Michigan has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 38.1 °F (low) to 56.5 °F (high). Annual precipitation averages 37.8 Inches. Ravenna is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 16.9 °F | 30.0 °F | 2.59 in. |
| February | 17.1 °F | 32.5 °F | 1.99 in. |
| March | 24.1 °F | 42.6 °F | 2.38 in. |
| April | 34.7 °F | 55.4 °F | 3.77 in. |
| May | 46.0 °F | 67.3 °F | 4.07 in. |
| June | 55.6 °F | 76.9 °F | 3.68 in. |
| July | 59.4 °F | 80.7 °F | 3.22 in. |
| August | 58.2 °F | 79.4 °F | 3.32 in. |
| September | 50.7 °F | 72.7 °F | 3.23 in. |
| October | 40.2 °F | 59.6 °F | 3.81 in. |
| November | 31.4 °F | 46.0 °F | 3.23 in. |
| December | 23.4 °F | 35.0 °F | 2.5 in. |
| Annual | 38.1 °F | 56.5 °F | 37.79 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | May 1 - May 10 |
| 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 | Dfb - Humid Continental Mild Summer, Wet All Year |