Fairmont, North Carolina has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 11 °C (low) to 23.1 °C (high). Annual precipitation averages 1244.4 Millimeters. Fairmont is located in USDA Plant Hardiness Zone 8b. 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 | 0.7 °C | 12.8 °C | 90.42 mm |
| February | 2 °C | 14.6 °C | 84.33 mm |
| March | 5.3 °C | 18.7 °C | 91.19 mm |
| April | 10.1 °C | 23.6 °C | 87.12 mm |
| May | 15 °C | 27.5 °C | 93.73 mm |
| June | 19.8 °C | 30.9 °C | 124.71 mm |
| July | 21.8 °C | 32.4 °C | 127.76 mm |
| August | 20.9 °C | 31.4 °C | 140.97 mm |
| September | 17.8 °C | 28.7 °C | 141.48 mm |
| October | 11.2 °C | 23.9 °C | 87.63 mm |
| November | 5.3 °C | 18.6 °C | 83.57 mm |
| December | 2.3 °C | 14.3 °C | 91.44 mm |
| Annual | 11 °C | 23.1 °C | 1244.35 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 8b : -9.4°C to -6.7°C |
| Plant Hardiness Zone - 2012 | Zone 8a : -12.2°C to -9.4°C |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |