Dexter, Georgia has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 11.6 °C (low) to 24.9 °C (high). Annual precipitation averages 1216.4 Millimeters. Dexter 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 | 1.8 °C | 15.1 °C | 114.81 mm |
| February | 3.3 °C | 17.1 °C | 109.47 mm |
| March | 6.6 °C | 21.1 °C | 113.79 mm |
| April | 10.6 °C | 25.2 °C | 89.15 mm |
| May | 15.5 °C | 29.3 °C | 70.87 mm |
| June | 19.8 °C | 32.1 °C | 119.38 mm |
| July | 21.7 °C | 33.7 °C | 120.9 mm |
| August | 21.3 °C | 32.9 °C | 123.7 mm |
| September | 18.1 °C | 30.4 °C | 98.04 mm |
| October | 11.8 °C | 25.7 °C | 69.09 mm |
| November | 5.8 °C | 20.4 °C | 76.45 mm |
| December | 3.1 °C | 16.3 °C | 110.74 mm |
| Annual | 11.6 °C | 24.9 °C | 1216.39 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 |