Allentown, Georgia has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 53.1 °F (low) to 76 °F (high). Annual precipitation averages 48.2 Inches. Allentown is located in USDA Plant Hardiness Zone 8b. The growing season typically runs from the last frost around Mar. 11 - Mar. 20 through the first frost around Nov. 11 - Nov. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 35.3 °F | 58.0 °F | 4.46 in. |
| February | 38.1 °F | 61.9 °F | 4.6 in. |
| March | 44.1 °F | 69.1 °F | 4.46 in. |
| April | 51.3 °F | 76.4 °F | 3.71 in. |
| May | 60.2 °F | 83.7 °F | 2.87 in. |
| June | 67.7 °F | 89.0 °F | 4.56 in. |
| July | 71.0 °F | 91.9 °F | 4.62 in. |
| August | 70.2 °F | 90.5 °F | 4.44 in. |
| September | 64.8 °F | 85.9 °F | 3.91 in. |
| October | 53.6 °F | 77.3 °F | 2.79 in. |
| November | 42.9 °F | 67.9 °F | 3.02 in. |
| December | 37.7 °F | 60.5 °F | 4.72 in. |
| Annual | 53.1 °F | 76 °F | 48.16 in. |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Mar. 11 - Mar. 20 |
| Average Days With Frost | 30-40 Days |
| Plant Hardiness Zone | Zone 8b : 15°F to 20°F |
| Plant Hardiness Zone - 2012 | Zone 8a : 10°F to 15°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |