Holton, Indiana has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 6.2 °C (low) to 17.6 °C (high). Annual precipitation averages 1214.1 Millimeters. 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 | -5.8 °C | 3.3 °C | 88.65 mm |
| February | -4.7 °C | 5.7 °C | 76.96 mm |
| March | 0.1 °C | 11.4 °C | 102.62 mm |
| April | 5.8 °C | 18.3 °C | 126.49 mm |
| May | 11.4 °C | 23.6 °C | 132.08 mm |
| June | 16.1 °C | 27.6 °C | 127 mm |
| July | 17.9 °C | 29.3 °C | 108.2 mm |
| August | 17.1 °C | 29.1 °C | 92.46 mm |
| September | 12.9 °C | 26 °C | 83.06 mm |
| October | 6.5 °C | 19.4 °C | 86.87 mm |
| November | 0.7 °C | 12 °C | 92.2 mm |
| December | -3.3 °C | 5.8 °C | 97.54 mm |
| Annual | 6.2 °C | 17.6 °C | 1214.13 mm |
| 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 : -20.6°C to -17.8°C |
| Plant Hardiness Zone - 2012 | Zone 6a : -23.3°C to -20.6°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |