Alston, Georgia has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 55.1 °F (low) to 77.7 °F (high). Annual precipitation averages 47.6 Inches. Alston 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 | 37.8 °F | 60.6 °F | 4.31 in. |
| February | 40.6 °F | 64.3 °F | 3.98 in. |
| March | 46.2 °F | 70.9 °F | 4.29 in. |
| April | 53.3 °F | 78.0 °F | 3.3 in. |
| May | 61.9 °F | 85.3 °F | 2.93 in. |
| June | 69.3 °F | 90.3 °F | 4.95 in. |
| July | 72.0 °F | 92.4 °F | 4.83 in. |
| August | 71.6 °F | 91.4 °F | 5.84 in. |
| September | 66.7 °F | 87.0 °F | 3.8 in. |
| October | 55.9 °F | 79.1 °F | 2.77 in. |
| November | 45.4 °F | 69.9 °F | 2.69 in. |
| December | 40.2 °F | 62.9 °F | 3.92 in. |
| Annual | 55.1 °F | 77.7 °F | 47.61 in. |
| 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 9a : 20°F to 25°F |
| Plant Hardiness Zone - 2012 | Zone 8b : 15°F to 20°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |