Allentown, Florida has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 13.3 °C (low) to 25.4 °C (high). Annual precipitation averages 1751.9 Millimeters. Allentown 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 | 3.9 °C | 16.1 °C | 153.42 mm |
| February | 5.6 °C | 18.4 °C | 123.95 mm |
| March | 8.8 °C | 21.9 °C | 147.07 mm |
| April | 12.6 °C | 25.4 °C | 140.72 mm |
| May | 17.1 °C | 29.3 °C | 108.97 mm |
| June | 21.2 °C | 31.9 °C | 196.34 mm |
| July | 22.2 °C | 32.8 °C | 193.04 mm |
| August | 22.1 °C | 32.6 °C | 173.23 mm |
| September | 19.7 °C | 30.8 °C | 156.21 mm |
| October | 13.7 °C | 26.8 °C | 107.95 mm |
| November | 7.8 °C | 21.2 °C | 119.13 mm |
| December | 5.4 °C | 17.6 °C | 131.83 mm |
| Annual | 13.3 °C | 25.4 °C | 1751.86 mm |
| Average First Frost Date | Nov. 21 - Nov. 30 |
| Average Last Frost Date | Feb. 21 - Feb. 29 |
| Average Days With Frost | 20-30 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 |