Deloit, Iowa has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 3 °C (low) to 14.9 °C (high). Annual precipitation averages 842.8 Millimeters. Deloit is located in USDA Plant Hardiness Zone 5a. 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 | -12 °C | -2 °C | 18.29 mm |
| February | -9.8 °C | 0.7 °C | 24.38 mm |
| March | -3.7 °C | 8.1 °C | 46.99 mm |
| April | 2.3 °C | 15.6 °C | 85.6 mm |
| May | 9.2 °C | 21.7 °C | 117.6 mm |
| June | 15.2 °C | 27.2 °C | 123.95 mm |
| July | 17.3 °C | 28.8 °C | 102.36 mm |
| August | 15.7 °C | 27.7 °C | 112.01 mm |
| September | 10.6 °C | 24.5 °C | 82.04 mm |
| October | 3.8 °C | 17.2 °C | 62.99 mm |
| November | -3.3 °C | 8.2 °C | 35.81 mm |
| December | -8.8 °C | 0.8 °C | 30.73 mm |
| Annual | 3 °C | 14.9 °C | 842.75 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 5a : -28.9°C to -26.1°C |
| Plant Hardiness Zone - 2012 | Zone 5a : -28.9°C to -26.1°C |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |