Holton, Indiana has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 43.2 °F (low) to 63.7 °F (high). Annual precipitation averages 47.8 Inches. Holton is located in USDA Plant Hardiness Zone 6b. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 21.5 °F | 38.0 °F | 3.49 in. |
| February | 23.5 °F | 42.3 °F | 3.03 in. |
| March | 32.2 °F | 52.6 °F | 4.04 in. |
| April | 42.4 °F | 65.0 °F | 4.98 in. |
| May | 52.6 °F | 74.4 °F | 5.2 in. |
| June | 61.0 °F | 81.6 °F | 5.0 in. |
| July | 64.3 °F | 84.8 °F | 4.26 in. |
| August | 62.7 °F | 84.3 °F | 3.64 in. |
| September | 55.2 °F | 78.8 °F | 3.27 in. |
| October | 43.7 °F | 66.9 °F | 3.42 in. |
| November | 33.3 °F | 53.6 °F | 3.63 in. |
| December | 26.1 °F | 42.4 °F | 3.84 in. |
| Annual | 43.2 °F | 63.7 °F | 47.8 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 75-100 Days |
| Plant Hardiness Zone | Zone 6b : -5°F to 0°F |
| Plant Hardiness Zone - 2012 | Zone 6a : -10°F to -5°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |