Gravity, Iowa has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 4.4 °C (low) to 16.1 °C (high). Annual precipitation averages 948.2 Millimeters. Gravity is located in USDA Plant Hardiness Zone 5b. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -10.6 °C | 0 °C | 22.86 mm |
| February | -8.1 °C | 3.1 °C | 31.5 mm |
| March | -2.3 °C | 10.1 °C | 56.39 mm |
| April | 3.7 °C | 16.7 °C | 92.46 mm |
| May | 10.3 °C | 22.3 °C | 136.91 mm |
| June | 15.9 °C | 27.4 °C | 138.68 mm |
| July | 18.3 °C | 29.7 °C | 115.32 mm |
| August | 17.1 °C | 28.8 °C | 103.12 mm |
| September | 11.9 °C | 24.9 °C | 88.14 mm |
| October | 5.1 °C | 18.1 °C | 74.42 mm |
| November | -1.6 °C | 9.7 °C | 52.58 mm |
| December | -7.4 °C | 2.7 °C | 35.81 mm |
| Annual | 4.4 °C | 16.1 °C | 948.19 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 5b : -26.1°C to -23.3°C |
| Plant Hardiness Zone - 2012 | Zone 5a : -28.9°C to -26.1°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |