Jesup, Georgia has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 13 °C (low) to 25.9 °C (high). Annual precipitation averages 1260.4 Millimeters. Jesup 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 | 3.5 °C | 16.9 °C | 104.9 mm |
| February | 4.9 °C | 18.8 °C | 92.96 mm |
| March | 8.2 °C | 22.4 °C | 101.35 mm |
| April | 11.8 °C | 26.3 °C | 85.09 mm |
| May | 16.3 °C | 30 °C | 81.53 mm |
| June | 20.6 °C | 32.4 °C | 159 mm |
| July | 22.1 °C | 33.8 °C | 140.72 mm |
| August | 22.1 °C | 33.2 °C | 155.96 mm |
| September | 19.7 °C | 30.7 °C | 101.09 mm |
| October | 13.8 °C | 26.5 °C | 95.76 mm |
| November | 7.8 °C | 21.8 °C | 59.44 mm |
| December | 5 °C | 18.2 °C | 82.55 mm |
| Annual | 13 °C | 25.9 °C | 1260.35 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 |