Chester, Georgia has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 11.9 °C (low) to 24.7 °C (high). Annual precipitation averages 1211.8 Millimeters. Chester 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. 11 - Nov. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 2.2 °C | 14.8 °C | 114.81 mm |
| February | 3.6 °C | 16.9 °C | 108.71 mm |
| March | 6.9 °C | 20.8 °C | 113.54 mm |
| April | 10.9 °C | 25 °C | 89.66 mm |
| May | 15.8 °C | 29.1 °C | 71.12 mm |
| June | 20 °C | 31.9 °C | 119.38 mm |
| July | 21.8 °C | 33.4 °C | 120.14 mm |
| August | 21.3 °C | 32.7 °C | 120.14 mm |
| September | 18.3 °C | 30.3 °C | 97.79 mm |
| October | 12.1 °C | 25.6 °C | 69.6 mm |
| November | 6.2 °C | 20.2 °C | 76.45 mm |
| December | 3.4 °C | 16.1 °C | 110.49 mm |
| Annual | 11.9 °C | 24.7 °C | 1211.83 mm |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Mar. 1 - Mar. 10 |
| 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 | Abnormally Dry |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |