Hazel Green, Kentucky has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 6.5 °C (low) to 19.2 °C (high). Annual precipitation averages 1221.8 Millimeters. Hazel Green 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 | -4.5 °C | 6.1 °C | 90.68 mm |
| February | -3.3 °C | 8.4 °C | 88.65 mm |
| March | 0.4 °C | 13.8 °C | 111.25 mm |
| April | 5.5 °C | 20.1 °C | 102.62 mm |
| May | 11.1 °C | 24.2 °C | 122.43 mm |
| June | 15.7 °C | 28.3 °C | 129.29 mm |
| July | 17.9 °C | 30 °C | 142.75 mm |
| August | 17.1 °C | 29.6 °C | 92.71 mm |
| September | 13.4 °C | 26.5 °C | 85.09 mm |
| October | 6.3 °C | 20.7 °C | 68.58 mm |
| November | 0.8 °C | 13.9 °C | 77.47 mm |
| December | -2.2 °C | 8.3 °C | 110.24 mm |
| Annual | 6.5 °C | 19.2 °C | 1221.76 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 6b : -20.6°C to -17.8°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 |