Prestonsburg, Kentucky has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 43.4 °F (low) to 67.9 °F (high). Annual precipitation averages 46.8 Inches. Prestonsburg 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 | 23.8 °F | 45.0 °F | 3.46 in. |
| February | 26.0 °F | 49.1 °F | 3.44 in. |
| March | 31.9 °F | 59.0 °F | 4.32 in. |
| April | 41.1 °F | 70.2 °F | 4.03 in. |
| May | 51.4 °F | 77.5 °F | 4.7 in. |
| June | 60.2 °F | 84.1 °F | 4.62 in. |
| July | 64.4 °F | 87.4 °F | 5.24 in. |
| August | 63.0 °F | 86.3 °F | 3.79 in. |
| September | 55.9 °F | 80.2 °F | 3.15 in. |
| October | 43.4 °F | 69.5 °F | 2.95 in. |
| November | 32.4 °F | 58.6 °F | 2.97 in. |
| December | 27.4 °F | 48.3 °F | 4.14 in. |
| Annual | 43.4 °F | 67.9 °F | 46.81 in. |
| 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 : 0°F to 5°F |
| Plant Hardiness Zone - 2012 | Zone 6b : -5°F to 0°F |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |