Rockingham, Georgia has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 12.9 °C (low) to 25.5 °C (high). Annual precipitation averages 1226.6 Millimeters. Rockingham is located in USDA Plant Hardiness Zone 9a. The growing season typically runs from the last frost around Mar. 1 - Mar. 10 through the first frost around Nov. 21 - Nov. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 3.4 °C | 16.3 °C | 105.41 mm |
| February | 4.9 °C | 18.3 °C | 96.77 mm |
| March | 8.1 °C | 22.1 °C | 106.93 mm |
| April | 11.9 °C | 25.7 °C | 83.31 mm |
| May | 16.5 °C | 29.6 °C | 71.88 mm |
| June | 20.6 °C | 32.1 °C | 142.75 mm |
| July | 22.1 °C | 33.3 °C | 130.05 mm |
| August | 21.9 °C | 32.7 °C | 155.96 mm |
| September | 19.4 °C | 30.4 °C | 102.36 mm |
| October | 13.6 °C | 26.3 °C | 81.79 mm |
| November | 7.6 °C | 21.5 °C | 61.47 mm |
| December | 4.7 °C | 17.7 °C | 87.88 mm |
| Annual | 12.9 °C | 25.5 °C | 1226.56 mm |
| Average First Frost Date | Nov. 21 - Nov. 30 |
| Average Last Frost Date | Mar. 1 - Mar. 10 |
| Average Days With Frost | 20-30 Days |
| Plant Hardiness Zone | Zone 9a : -6.7°C to -3.9°C |
| Plant Hardiness Zone - 2012 | Zone 8b : -9.4°C to -6.7°C |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |