Jefferson, North Carolina has a Temperate Oceanic Climate climate (Köppen classification: Cfb). Average annual temperatures range from 41.4 °F (low) to 62.4 °F (high). Annual precipitation averages 54.7 Inches. Jefferson is located in USDA Plant Hardiness Zone 7a. The growing season typically runs from the last frost around May 11 - May 20 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 23.6 °F | 42.5 °F | 4.27 in. |
| February | 26.1 °F | 45.7 °F | 3.56 in. |
| March | 31.5 °F | 52.7 °F | 4.55 in. |
| April | 39.6 °F | 62.7 °F | 5.18 in. |
| May | 48.6 °F | 70.3 °F | 5.07 in. |
| June | 56.1 °F | 77.2 °F | 5.12 in. |
| July | 60.3 °F | 80.1 °F | 5.12 in. |
| August | 59.0 °F | 78.9 °F | 5.03 in. |
| September | 52.7 °F | 73.8 °F | 4.71 in. |
| October | 41.7 °F | 64.5 °F | 3.91 in. |
| November | 31.1 °F | 54.4 °F | 3.96 in. |
| December | 26.9 °F | 46.2 °F | 4.23 in. |
| Annual | 41.4 °F | 62.4 °F | 54.71 in. |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | 125-150 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 | Extreme Drought |
| Köppen Climate Classification | Cfb - Temperate Oceanic Climate |