Kiron, Iowa has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 3 °C (low) to 14.6 °C (high). Annual precipitation averages 827.3 Millimeters. Kiron 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. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -12.3 °C | -2.4 °C | 17.53 mm |
| February | -10.1 °C | 0.2 °C | 23.88 mm |
| March | -3.8 °C | 7.7 °C | 45.72 mm |
| April | 2.2 °C | 15.3 °C | 84.84 mm |
| May | 9.2 °C | 21.5 °C | 116.59 mm |
| June | 15.2 °C | 27.1 °C | 123.19 mm |
| July | 17.2 °C | 28.7 °C | 97.28 mm |
| August | 15.7 °C | 27.5 °C | 113.03 mm |
| September | 10.7 °C | 24.3 °C | 81.03 mm |
| October | 3.8 °C | 17 °C | 59.18 mm |
| November | -3.3 °C | 7.9 °C | 34.54 mm |
| December | -9.1 °C | 0.4 °C | 30.48 mm |
| Annual | 3 °C | 14.6 °C | 827.29 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 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 |