Register, Georgia has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 12.6 °C (low) to 25.1 °C (high). Annual precipitation averages 1223 Millimeters. Register is located in USDA Plant Hardiness Zone 8b. 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 | 2.8 °C | 15.6 °C | 100.33 mm |
| February | 4.3 °C | 17.6 °C | 97.28 mm |
| March | 7.6 °C | 21.4 °C | 98.04 mm |
| April | 11.6 °C | 25.4 °C | 84.58 mm |
| May | 16.5 °C | 29.4 °C | 82.55 mm |
| June | 20.7 °C | 32.2 °C | 137.41 mm |
| July | 22.2 °C | 33.5 °C | 133.1 mm |
| August | 22.1 °C | 32.8 °C | 149.1 mm |
| September | 19.2 °C | 30.3 °C | 98.04 mm |
| October | 13.1 °C | 25.8 °C | 73.41 mm |
| November | 6.9 °C | 20.8 °C | 69.85 mm |
| December | 4.2 °C | 16.9 °C | 99.31 mm |
| Annual | 12.6 °C | 25.1 °C | 1223 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 8b : -9.4°C to -6.7°C |
| Plant Hardiness Zone - 2012 | Zone 8b : -9.4°C to -6.7°C |
| Current Drought Conditions | Extreme Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |