Nebo, Kentucky has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 8.5 °C (low) to 20.4 °C (high). Annual precipitation averages 1259.1 Millimeters. Nebo is located in USDA Plant Hardiness Zone 7a. The growing season typically runs from the last frost around Apr. 1 - Apr. 10 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -3.3 °C | 6.6 °C | 93.47 mm |
| February | -1.7 °C | 9.3 °C | 98.55 mm |
| March | 2.7 °C | 14.6 °C | 122.17 mm |
| April | 8 °C | 21.2 °C | 125.73 mm |
| May | 13.8 °C | 25.8 °C | 130.05 mm |
| June | 18.3 °C | 30.1 °C | 112.78 mm |
| July | 20.2 °C | 31.8 °C | 115.57 mm |
| August | 19.1 °C | 31.4 °C | 73.15 mm |
| September | 14.9 °C | 28.5 °C | 83.06 mm |
| October | 8.4 °C | 22.1 °C | 93.47 mm |
| November | 2.6 °C | 14.6 °C | 100.33 mm |
| December | -1.3 °C | 8.7 °C | 110.74 mm |
| Annual | 8.5 °C | 20.4 °C | 1259.07 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| 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 |