Belfry, Kentucky has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 7.7 °C (low) to 20.1 °C (high). Annual precipitation averages 1234.2 Millimeters. Belfry is located in USDA Plant Hardiness Zone 7a. 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 | -3.3 °C | 7.1 °C | 91.95 mm |
| February | -2 °C | 9.4 °C | 93.22 mm |
| March | 1.4 °C | 14.4 °C | 114.81 mm |
| April | 6.8 °C | 21.3 °C | 103.12 mm |
| May | 12.1 °C | 25.4 °C | 118.87 mm |
| June | 16.7 °C | 29.2 °C | 119.38 mm |
| July | 18.7 °C | 30.9 °C | 143.76 mm |
| August | 18.2 °C | 30.5 °C | 100.58 mm |
| September | 14.6 °C | 27.5 °C | 85.6 mm |
| October | 7.8 °C | 21.3 °C | 76.45 mm |
| November | 2 °C | 14.6 °C | 75.95 mm |
| December | -1 °C | 9.2 °C | 110.49 mm |
| Annual | 7.7 °C | 20.1 °C | 1234.18 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 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 |