Grand Rapids, Ohio has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 40.9 °F (low) to 60.1 °F (high). Annual precipitation averages 35.8 Inches. Grand Rapids 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 | 18.3 °F | 32.7 °F | 2.36 in. |
| February | 19.9 °F | 36.0 °F | 2.16 in. |
| March | 27.8 °F | 46.3 °F | 2.59 in. |
| April | 38.2 °F | 59.7 °F | 3.46 in. |
| May | 49.9 °F | 71.3 °F | 4.03 in. |
| June | 59.9 °F | 80.8 °F | 3.81 in. |
| July | 63.1 °F | 84.6 °F | 3.33 in. |
| August | 61.1 °F | 82.4 °F | 3.32 in. |
| September | 53.6 °F | 76.6 °F | 2.89 in. |
| October | 42.5 °F | 63.6 °F | 2.75 in. |
| November | 32.5 °F | 49.5 °F | 2.68 in. |
| December | 24.1 °F | 37.8 °F | 2.39 in. |
| Annual | 40.9 °F | 60.1 °F | 35.77 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 |