Harrodsburg, Kentucky has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 7.5 °C (low) to 18.9 °C (high). Annual precipitation averages 1240.5 Millimeters. Harrodsburg is located in USDA Plant Hardiness Zone 7a. 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 | -4.1 °C | 5.6 °C | 91.69 mm |
| February | -2.6 °C | 8.1 °C | 97.28 mm |
| March | 1.3 °C | 13.1 °C | 119.63 mm |
| April | 6.6 °C | 19.2 °C | 114.55 mm |
| May | 12.6 °C | 23.9 °C | 131.06 mm |
| June | 16.9 °C | 28.7 °C | 133.1 mm |
| July | 19 °C | 30.3 °C | 117.35 mm |
| August | 17.9 °C | 29.9 °C | 83.57 mm |
| September | 14.1 °C | 26.9 °C | 89.15 mm |
| October | 7.8 °C | 20.7 °C | 77.98 mm |
| November | 1.7 °C | 13.3 °C | 79.76 mm |
| December | -1.8 °C | 7.6 °C | 105.41 mm |
| Annual | 7.5 °C | 18.9 °C | 1240.53 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 75-100 Days |
| Plant Hardiness Zone | Zone 7a : -17.8°C to -15°C |
| Plant Hardiness Zone - 2012 | Zone 6b : -20.6°C to -17.8°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |