Marshallville, Georgia has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 11.8 °C (low) to 24.5 °C (high). Annual precipitation averages 1254 Millimeters. Marshallville is located in USDA Plant Hardiness Zone 8b. The growing season typically runs from the last frost around Mar. 11 - Mar. 20 through the first frost around Nov. 11 - Nov. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 1.9 °C | 14.3 °C | 111.51 mm |
| February | 3.6 °C | 16.6 °C | 115.32 mm |
| March | 7 °C | 20.7 °C | 123.7 mm |
| April | 10.9 °C | 24.7 °C | 93.22 mm |
| May | 15.8 °C | 28.9 °C | 80.52 mm |
| June | 20.1 °C | 31.7 °C | 115.06 mm |
| July | 21.6 °C | 33.1 °C | 120.14 mm |
| August | 21.2 °C | 32.4 °C | 107.44 mm |
| September | 18.2 °C | 30.1 °C | 104.65 mm |
| October | 12.1 °C | 25.2 °C | 76.45 mm |
| November | 6.2 °C | 20 °C | 88.9 mm |
| December | 3.4 °C | 15.7 °C | 117.09 mm |
| Annual | 11.8 °C | 24.5 °C | 1254 mm |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Mar. 11 - Mar. 20 |
| Average Days With Frost | 30-40 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 | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |