Mount Airy, North Carolina has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 7.6 °C (low) to 20.4 °C (high). Annual precipitation averages 1283.5 Millimeters. Mount Airy is located in USDA Plant Hardiness Zone 7b. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -2.8 °C | 9 °C | 101.35 mm |
| February | -1.7 °C | 11.1 °C | 80.52 mm |
| March | 1.8 °C | 15.3 °C | 107.19 mm |
| April | 6.6 °C | 20.9 °C | 108.97 mm |
| May | 11.8 °C | 24.9 °C | 118.11 mm |
| June | 16.4 °C | 28.8 °C | 121.41 mm |
| July | 18.7 °C | 30.7 °C | 132.33 mm |
| August | 18.1 °C | 29.8 °C | 124.46 mm |
| September | 14.4 °C | 26.7 °C | 108.46 mm |
| October | 7.5 °C | 21.4 °C | 87.88 mm |
| November | 1.7 °C | 15.6 °C | 85.85 mm |
| December | -1.3 °C | 10.6 °C | 106.93 mm |
| Annual | 7.6 °C | 20.4 °C | 1283.46 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 7b : -15°C to -12.2°C |
| Plant Hardiness Zone - 2012 | Zone 7a : -17.8°C to -15°C |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |