Blackshear, Georgia has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 12.7 °C (low) to 26.1 °C (high). Annual precipitation averages 1256.8 Millimeters. Blackshear 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. 21 - Nov. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 3.4 °C | 17.1 °C | 104.39 mm |
| February | 4.8 °C | 19 °C | 92.71 mm |
| March | 7.8 °C | 22.7 °C | 101.35 mm |
| April | 11.6 °C | 26.3 °C | 80.77 mm |
| May | 16.1 °C | 30.1 °C | 78.23 mm |
| June | 20.3 °C | 32.6 °C | 164.85 mm |
| July | 21.8 °C | 33.8 °C | 144.02 mm |
| August | 21.8 °C | 33.1 °C | 161.54 mm |
| September | 19.4 °C | 30.8 °C | 110.49 mm |
| October | 13.5 °C | 26.7 °C | 88.39 mm |
| November | 7.6 °C | 22.1 °C | 54.1 mm |
| December | 4.7 °C | 18.4 °C | 75.95 mm |
| Annual | 12.7 °C | 26.1 °C | 1256.79 mm |
| Average First Frost Date | Nov. 21 - Nov. 30 |
| Average Last Frost Date | Mar. 1 - Mar. 10 |
| Average Days With Frost | 20-30 Days |
| Plant Hardiness Zone | Zone 8b : -9.4°C to -6.7°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 |