Mentor, Kentucky has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 44.7 °F (low) to 65.2 °F (high). Annual precipitation averages 44.2 Inches. Mentor 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 | 23.6 °F | 40.2 °F | 3.16 in. |
| February | 25.9 °F | 44.5 °F | 2.93 in. |
| March | 33.1 °F | 54.0 °F | 4.19 in. |
| April | 43.0 °F | 66.0 °F | 4.33 in. |
| May | 53.3 °F | 74.8 °F | 4.88 in. |
| June | 61.9 °F | 83.1 °F | 4.39 in. |
| July | 65.8 °F | 86.4 °F | 4.64 in. |
| August | 64.4 °F | 85.5 °F | 3.32 in. |
| September | 56.9 °F | 79.9 °F | 2.98 in. |
| October | 45.0 °F | 68.3 °F | 2.92 in. |
| November | 34.8 °F | 54.9 °F | 3.07 in. |
| December | 28.5 °F | 44.5 °F | 3.38 in. |
| Annual | 44.7 °F | 65.2 °F | 44.19 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 6b : -5°F to 0°F |
| Plant Hardiness Zone - 2012 | Zone 6b : -5°F to 0°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |