Jonesville, 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 17.8 °C (high). Annual precipitation averages 1234.7 Millimeters. Jonesville 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. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -5.7 °C | 3.5 °C | 90.17 mm |
| February | -4.4 °C | 5.9 °C | 73.41 mm |
| March | -0.1 °C | 11.7 °C | 101.35 mm |
| April | 5.6 °C | 18.4 °C | 131.83 mm |
| May | 11.6 °C | 23.6 °C | 134.62 mm |
| June | 16.3 °C | 27.9 °C | 132.33 mm |
| July | 18.2 °C | 29.5 °C | 108.97 mm |
| August | 17 °C | 29.2 °C | 98.3 mm |
| September | 12.7 °C | 26.1 °C | 84.33 mm |
| October | 6.1 °C | 19.6 °C | 90.17 mm |
| November | 0.9 °C | 12.2 °C | 95 mm |
| December | -3.3 °C | 5.8 °C | 94.23 mm |
| Annual | 6.2 °C | 17.8 °C | 1234.71 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 100-125 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 |