Phelps, Kentucky has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 45.3 °F (low) to 67.3 °F (high). Annual precipitation averages 49.3 Inches. Phelps 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 | 25.4 °F | 44.3 °F | 3.78 in. |
| February | 27.8 °F | 48.4 °F | 3.98 in. |
| March | 34.1 °F | 57.4 °F | 4.58 in. |
| April | 44.0 °F | 69.5 °F | 4.18 in. |
| May | 52.9 °F | 76.8 °F | 4.81 in. |
| June | 61.7 °F | 83.3 °F | 4.47 in. |
| July | 65.1 °F | 86.5 °F | 5.72 in. |
| August | 64.2 °F | 85.5 °F | 3.87 in. |
| September | 57.9 °F | 80.5 °F | 3.44 in. |
| October | 45.6 °F | 69.2 °F | 2.98 in. |
| November | 34.9 °F | 57.7 °F | 3.01 in. |
| December | 29.8 °F | 47.9 °F | 4.5 in. |
| Annual | 45.3 °F | 67.3 °F | 49.32 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 |