Hardinsburg, Indiana has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 6.4 °C (low) to 18.8 °C (high). Annual precipitation averages 1289.1 Millimeters. Hardinsburg 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 | -5.5 °C | 4.8 °C | 94.74 mm |
| February | -4 °C | 7.5 °C | 86.61 mm |
| March | 0.3 °C | 12.9 °C | 116.59 mm |
| April | 5.6 °C | 19.6 °C | 137.16 mm |
| May | 11.5 °C | 24.3 °C | 139.19 mm |
| June | 16.2 °C | 28.5 °C | 127 mm |
| July | 18.1 °C | 30.2 °C | 111.51 mm |
| August | 17.1 °C | 29.9 °C | 84.58 mm |
| September | 12.9 °C | 26.8 °C | 94.74 mm |
| October | 6.3 °C | 20.4 °C | 93.47 mm |
| November | 1.1 °C | 13.2 °C | 98.81 mm |
| December | -2.9 °C | 7 °C | 104.65 mm |
| Annual | 6.4 °C | 18.8 °C | 1289.05 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| 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 |