Deenwood, Georgia has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 13.1 °C (low) to 26.1 °C (high). Annual precipitation averages 1252.5 Millimeters. Deenwood is located in USDA Plant Hardiness Zone 9a. 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 | 3.7 °C | 17.2 °C | 103.89 mm |
| February | 5.2 °C | 19.1 °C | 93.22 mm |
| March | 8.3 °C | 22.7 °C | 103.89 mm |
| April | 12.1 °C | 26.4 °C | 80.77 mm |
| May | 16.5 °C | 30.1 °C | 71.37 mm |
| June | 20.7 °C | 32.6 °C | 162.05 mm |
| July | 22.1 °C | 33.7 °C | 152.4 mm |
| August | 22 °C | 33.1 °C | 160.78 mm |
| September | 19.7 °C | 30.8 °C | 108.71 mm |
| October | 13.8 °C | 26.7 °C | 85.09 mm |
| November | 7.9 °C | 22.2 °C | 54.61 mm |
| December | 5 °C | 18.5 °C | 75.69 mm |
| Annual | 13.1 °C | 26.1 °C | 1252.47 mm |
| Average First Frost Date | Nov. 21 - Nov. 30 |
| Average Last Frost Date | Mar. 1 - Mar. 10 |
| Average Days With Frost | 10-20 Days |
| Plant Hardiness Zone | Zone 9a : -6.7°C to -3.9°C |
| Plant Hardiness Zone - 2012 | Zone 8b : -9.4°C to -6.7°C |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |