Kempton, Indiana has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 41.6 °F (low) to 61.3 °F (high). Annual precipitation averages 41.8 Inches. Kempton 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 | 18.5 °F | 34.1 °F | 2.75 in. |
| February | 21.0 °F | 38.1 °F | 2.29 in. |
| March | 29.9 °F | 49.1 °F | 3.04 in. |
| April | 40.3 °F | 61.9 °F | 4.03 in. |
| May | 51.6 °F | 72.7 °F | 4.47 in. |
| June | 60.7 °F | 81.0 °F | 5.07 in. |
| July | 63.3 °F | 83.7 °F | 4.53 in. |
| August | 61.2 °F | 82.5 °F | 3.4 in. |
| September | 53.9 °F | 77.6 °F | 3.21 in. |
| October | 42.7 °F | 65.3 °F | 3.06 in. |
| November | 32.5 °F | 50.6 °F | 3.23 in. |
| December | 23.9 °F | 38.9 °F | 2.7 in. |
| Annual | 41.6 °F | 61.3 °F | 41.78 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 | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |