Youngsville, North Carolina has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 9.6 °C (low) to 21.2 °C (high). Annual precipitation averages 1219.7 Millimeters. Youngsville is located in USDA Plant Hardiness Zone 8a. 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 | -0.9 °C | 10.2 °C | 90.93 mm |
| February | 0.1 °C | 12.1 °C | 75.44 mm |
| March | 3.7 °C | 16.3 °C | 107.19 mm |
| April | 8.8 °C | 21.7 °C | 91.19 mm |
| May | 13.8 °C | 25.5 °C | 93.98 mm |
| June | 18.4 °C | 29.5 °C | 109.73 mm |
| July | 20.7 °C | 31.6 °C | 121.41 mm |
| August | 19.8 °C | 30.4 °C | 123.19 mm |
| September | 16.5 °C | 27.3 °C | 139.45 mm |
| October | 9.7 °C | 21.9 °C | 90.93 mm |
| November | 3.8 °C | 16.3 °C | 86.61 mm |
| December | 0.7 °C | 11.8 °C | 89.66 mm |
| Annual | 9.6 °C | 21.2 °C | 1219.71 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 8a : -12.2°C to -9.4°C |
| Plant Hardiness Zone - 2012 | Zone 7b : -15°C to -12.2°C |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |