Marion, North Carolina has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 7.7 °C (low) to 21.1 °C (high). Annual precipitation averages 1426 Millimeters. Marion is located in USDA Plant Hardiness Zone 7b. 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 | -2.4 °C | 10.1 °C | 117.86 mm |
| February | -1.2 °C | 12.3 °C | 97.54 mm |
| March | 2.3 °C | 16.5 °C | 115.57 mm |
| April | 6.8 °C | 21.8 °C | 129.54 mm |
| May | 11.8 °C | 25.7 °C | 127.51 mm |
| June | 16.3 °C | 29.2 °C | 129.29 mm |
| July | 18.3 °C | 30.9 °C | 126.75 mm |
| August | 17.8 °C | 30 °C | 130.56 mm |
| September | 14.4 °C | 27 °C | 120.65 mm |
| October | 7.8 °C | 22 °C | 103.38 mm |
| November | 1.8 °C | 16.4 °C | 104.65 mm |
| December | -1.2 °C | 11.6 °C | 122.68 mm |
| Annual | 7.7 °C | 21.1 °C | 1425.98 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 7b : -15°C to -12.2°C |
| Plant Hardiness Zone - 2012 | Zone 7b : -15°C to -12.2°C |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |