Dillsboro, Indiana has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 6.5 °C (low) to 17.8 °C (high). Annual precipitation averages 1186.5 Millimeters. Dillsboro is located in USDA Plant Hardiness Zone 6b. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -5.7 °C | 3.6 °C | 88.65 mm |
| February | -4.6 °C | 5.9 °C | 72.64 mm |
| March | 0.1 °C | 11.5 °C | 102.87 mm |
| April | 5.9 °C | 18.4 °C | 124.46 mm |
| May | 11.6 °C | 23.5 °C | 130.56 mm |
| June | 16.3 °C | 27.7 °C | 121.67 mm |
| July | 18.2 °C | 29.6 °C | 102.87 mm |
| August | 17.5 °C | 29.1 °C | 86.87 mm |
| September | 13.3 °C | 26.1 °C | 85.6 mm |
| October | 6.9 °C | 19.4 °C | 85.6 mm |
| November | 0.9 °C | 12.1 °C | 86.87 mm |
| December | -3 °C | 6.1 °C | 97.79 mm |
| Annual | 6.5 °C | 17.8 °C | 1186.45 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| 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 |