Kanawha, Iowa has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 36.2 °F (low) to 56.2 °F (high). Annual precipitation averages 34.2 Inches. Kanawha 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 | 7.6 °F | 24.7 °F | 0.8 in. |
| February | 11.9 °F | 29.3 °F | 0.98 in. |
| March | 24.0 °F | 42.1 °F | 2.16 in. |
| April | 35.3 °F | 57.5 °F | 3.89 in. |
| May | 48.0 °F | 69.4 °F | 4.87 in. |
| June | 58.8 °F | 79.5 °F | 5.42 in. |
| July | 62.0 °F | 82.3 °F | 4.07 in. |
| August | 59.1 °F | 80.1 °F | 3.98 in. |
| September | 50.3 °F | 74.2 °F | 2.82 in. |
| October | 37.8 °F | 60.8 °F | 2.27 in. |
| November | 25.6 °F | 44.1 °F | 1.66 in. |
| December | 14.2 °F | 30.3 °F | 1.3 in. |
| Annual | 36.2 °F | 56.2 °F | 34.22 in. |
| 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 : -20°F to -15°F |
| Plant Hardiness Zone - 2012 | Zone 5a : -20°F to -15°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |