Speed, North Carolina has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 10.1 °C (low) to 21.9 °C (high). Annual precipitation averages 1238.5 Millimeters. Speed is located in USDA Plant Hardiness Zone 8a. The growing season typically runs from the last frost around Mar. 21 - Mar. 31 through the first frost around Nov. 1 - Nov. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -0.4 °C | 11 °C | 92.96 mm |
| February | 0.4 °C | 12.8 °C | 76.71 mm |
| March | 4 °C | 16.7 °C | 100.58 mm |
| April | 9.2 °C | 22.2 °C | 89.66 mm |
| May | 14.3 °C | 26.1 °C | 89.66 mm |
| June | 19 °C | 30.2 °C | 119.13 mm |
| July | 21.3 °C | 31.9 °C | 131.57 mm |
| August | 20.3 °C | 30.8 °C | 134.11 mm |
| September | 17.1 °C | 27.9 °C | 148.08 mm |
| October | 10.2 °C | 22.8 °C | 88.14 mm |
| November | 4.2 °C | 17.2 °C | 82.55 mm |
| December | 1.2 °C | 12.7 °C | 85.34 mm |
| Annual | 10.1 °C | 21.9 °C | 1238.49 mm |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| Average Last Frost Date | Mar. 21 - Mar. 31 |
| Average Days With Frost | 50-75 Days |
| Plant Hardiness Zone | Zone 8a : -12.2°C to -9.4°C |
| Plant Hardiness Zone - 2012 | Zone 7b : -15°C to -12.2°C |
| Current Drought Conditions | Extreme Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |