Delco, North Carolina has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 11.1 °C (low) to 23.4 °C (high). Annual precipitation averages 1434.6 Millimeters. Delco is located in USDA Plant Hardiness Zone 8b. 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 | 0.9 °C | 13.7 °C | 98.55 mm |
| February | 1.8 °C | 15.3 °C | 88.39 mm |
| March | 5.2 °C | 19.2 °C | 102.62 mm |
| April | 10.1 °C | 23.6 °C | 88.39 mm |
| May | 14.9 °C | 27.3 °C | 103.63 mm |
| June | 19.6 °C | 30.6 °C | 138.68 mm |
| July | 21.7 °C | 32.3 °C | 150.62 mm |
| August | 20.9 °C | 31.4 °C | 169.42 mm |
| September | 18.1 °C | 28.8 °C | 200.66 mm |
| October | 11.4 °C | 24.2 °C | 110.24 mm |
| November | 5.6 °C | 19.3 °C | 89.15 mm |
| December | 2.6 °C | 15.3 °C | 94.23 mm |
| Annual | 11.1 °C | 23.4 °C | 1434.58 mm |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Mar. 11 - Mar. 20 |
| Average Days With Frost | 40-50 Days |
| Plant Hardiness Zone | Zone 8b : -9.4°C to -6.7°C |
| Plant Hardiness Zone - 2012 | Zone 8a : -12.2°C to -9.4°C |
| Current Drought Conditions | Extreme Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |