Eureka, North Carolina has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 50.7 °F (low) to 72.4 °F (high). Annual precipitation averages 50.5 Inches. Eureka is located in USDA Plant Hardiness Zone 8a. The growing season typically runs from the last frost around Mar. 11 - Mar. 20 through the first frost around Nov. 11 - Nov. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 31.9 °F | 52.9 °F | 3.64 in. |
| February | 33.5 °F | 56.3 °F | 3.01 in. |
| March | 39.8 °F | 63.5 °F | 3.93 in. |
| April | 49.3 °F | 73.0 °F | 3.63 in. |
| May | 58.3 °F | 80.2 °F | 3.97 in. |
| June | 66.8 °F | 87.2 °F | 4.59 in. |
| July | 70.7 °F | 90.3 °F | 5.56 in. |
| August | 68.8 °F | 88.1 °F | 5.57 in. |
| September | 63.2 °F | 83.0 °F | 6.38 in. |
| October | 50.9 °F | 73.9 °F | 3.42 in. |
| November | 40.3 °F | 64.0 °F | 3.31 in. |
| December | 34.9 °F | 55.9 °F | 3.44 in. |
| Annual | 50.7 °F | 72.4 °F | 50.45 in. |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Mar. 11 - Mar. 20 |
| Average Days With Frost | 50-75 Days |
| Plant Hardiness Zone | Zone 8a : 10°F to 15°F |
| Plant Hardiness Zone - 2012 | Zone 8a : 10°F to 15°F |
| Current Drought Conditions | Extreme Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |