Barwick, Georgia has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 13.7 °C (low) to 25.7 °C (high). Annual precipitation averages 1351 Millimeters. Barwick is located in USDA Plant Hardiness Zone 9a. The growing season typically runs from the last frost around Feb. 21 - Feb. 29 through the first frost around Nov. 21 - Nov. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 4.4 °C | 16.7 °C | 123.95 mm |
| February | 6.1 °C | 18.8 °C | 107.7 mm |
| March | 9.1 °C | 22.4 °C | 135.13 mm |
| April | 12.7 °C | 25.9 °C | 89.92 mm |
| May | 17.2 °C | 29.7 °C | 74.17 mm |
| June | 21.1 °C | 31.9 °C | 153.67 mm |
| July | 22.2 °C | 32.9 °C | 148.59 mm |
| August | 22.2 °C | 32.6 °C | 144.27 mm |
| September | 20 °C | 30.7 °C | 117.35 mm |
| October | 14.4 °C | 26.8 °C | 82.04 mm |
| November | 8.7 °C | 21.8 °C | 75.44 mm |
| December | 5.8 °C | 18.1 °C | 98.81 mm |
| Annual | 13.7 °C | 25.7 °C | 1351.04 mm |
| Average First Frost Date | Nov. 21 - Nov. 30 |
| Average Last Frost Date | Feb. 21 - Feb. 29 |
| 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 |