Grovetown, Georgia has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 11.2 °C (low) to 24.1 °C (high). Annual precipitation averages 1179.1 Millimeters. Grovetown 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 | 1.3 °C | 13.6 °C | 104.14 mm |
| February | 2.6 °C | 15.4 °C | 99.31 mm |
| March | 5.9 °C | 19.9 °C | 115.06 mm |
| April | 10.3 °C | 24.4 °C | 79.25 mm |
| May | 15.2 °C | 28.5 °C | 81.28 mm |
| June | 19.7 °C | 31.9 °C | 119.13 mm |
| July | 21.3 °C | 33.4 °C | 111 mm |
| August | 20.8 °C | 32.7 °C | 113.28 mm |
| September | 17.8 °C | 30.1 °C | 97.54 mm |
| October | 11.3 °C | 25.1 °C | 73.15 mm |
| November | 5.3 °C | 19.3 °C | 81.28 mm |
| December | 2.7 °C | 14.9 °C | 104.65 mm |
| Annual | 11.2 °C | 24.1 °C | 1179.07 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 | Abnormally Dry |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |