Kalona, Iowa has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 40.4 °F (low) to 60.6 °F (high). Annual precipitation averages 37.5 Inches. Kalona 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. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 13.9 °F | 30.7 °F | 1.27 in. |
| February | 17.5 °F | 35.2 °F | 1.5 in. |
| March | 28.3 °F | 48.3 °F | 2.29 in. |
| April | 39.5 °F | 62.1 °F | 3.7 in. |
| May | 51.5 °F | 72.8 °F | 4.84 in. |
| June | 61.6 °F | 82.0 °F | 5.16 in. |
| July | 65.0 °F | 85.4 °F | 4.21 in. |
| August | 62.5 °F | 83.5 °F | 4.27 in. |
| September | 53.7 °F | 77.5 °F | 3.46 in. |
| October | 41.8 °F | 64.5 °F | 2.93 in. |
| November | 30.1 °F | 49.0 °F | 2.19 in. |
| December | 19.7 °F | 35.9 °F | 1.68 in. |
| Annual | 40.4 °F | 60.6 °F | 37.5 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 5b : -15°F to -10°F |
| Plant Hardiness Zone - 2012 | Zone 5b : -15°F to -10°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |