Grand Rapids, Ohio has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 5 °C (low) to 15.6 °C (high). Annual precipitation averages 908.6 Millimeters. 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 | -7.6 °C | 0.4 °C | 59.94 mm |
| February | -6.7 °C | 2.2 °C | 54.86 mm |
| March | -2.3 °C | 7.9 °C | 65.79 mm |
| April | 3.4 °C | 15.4 °C | 87.88 mm |
| May | 9.9 °C | 21.8 °C | 102.36 mm |
| June | 15.5 °C | 27.1 °C | 96.77 mm |
| July | 17.3 °C | 29.2 °C | 84.58 mm |
| August | 16.2 °C | 28 °C | 84.33 mm |
| September | 12 °C | 24.8 °C | 73.41 mm |
| October | 5.8 °C | 17.6 °C | 69.85 mm |
| November | 0.3 °C | 9.7 °C | 68.07 mm |
| December | -4.4 °C | 3.2 °C | 60.71 mm |
| Annual | 5 °C | 15.6 °C | 908.55 mm |
| 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 : -23.3°C to -20.6°C |
| Plant Hardiness Zone - 2012 | Zone 6a : -23.3°C to -20.6°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |