Colerain, North Carolina has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 10.1 °C (low) to 21.8 °C (high). Annual precipitation averages 1296.9 Millimeters. Colerain 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 | -0.3 °C | 10.9 °C | 94.74 mm |
| February | 0.6 °C | 12.7 °C | 78.49 mm |
| March | 3.9 °C | 16.5 °C | 104.14 mm |
| April | 9.1 °C | 22 °C | 90.17 mm |
| May | 14.1 °C | 25.8 °C | 97.79 mm |
| June | 18.8 °C | 29.9 °C | 126.24 mm |
| July | 21.1 °C | 31.7 °C | 141.99 mm |
| August | 20.2 °C | 30.8 °C | 142.49 mm |
| September | 17.2 °C | 27.9 °C | 149.86 mm |
| October | 10.6 °C | 22.8 °C | 98.3 mm |
| November | 4.7 °C | 17.4 °C | 85.09 mm |
| December | 1.4 °C | 12.9 °C | 87.63 mm |
| Annual | 10.1 °C | 21.8 °C | 1296.93 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 8a : -12.2°C to -9.4°C |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |