Kewanna, Indiana has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 40.6 °F (low) to 60.1 °F (high). Annual precipitation averages 40.9 Inches. Kewanna is located in USDA Plant Hardiness Zone 6a. 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 | 17.0 °F | 32.2 °F | 2.61 in. |
| February | 19.5 °F | 36.3 °F | 2.23 in. |
| March | 28.4 °F | 47.7 °F | 2.64 in. |
| April | 38.6 °F | 60.3 °F | 3.78 in. |
| May | 50.1 °F | 71.5 °F | 4.31 in. |
| June | 60.0 °F | 80.8 °F | 4.59 in. |
| July | 62.8 °F | 83.7 °F | 4.61 in. |
| August | 60.9 °F | 82.0 °F | 4.16 in. |
| September | 53.1 °F | 76.6 °F | 3.35 in. |
| October | 42.0 °F | 64.0 °F | 3.19 in. |
| November | 31.9 °F | 49.1 °F | 3.0 in. |
| December | 23.0 °F | 37.3 °F | 2.38 in. |
| Annual | 40.6 °F | 60.1 °F | 40.85 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 6a : -10°F to -5°F |
| Plant Hardiness Zone - 2012 | Zone 5b : -15°F to -10°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |