Jacksonville, Georgia has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 12.5 °C (low) to 25.3 °C (high). Annual precipitation averages 1219 Millimeters. Jacksonville 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 | 2.8 °C | 15.9 °C | 109.22 mm |
| February | 4.4 °C | 17.9 °C | 102.62 mm |
| March | 7.6 °C | 21.6 °C | 118.62 mm |
| April | 11.6 °C | 25.5 °C | 84.07 mm |
| May | 16.2 °C | 29.6 °C | 71.63 mm |
| June | 20.5 °C | 32.2 °C | 125.98 mm |
| July | 22 °C | 33.4 °C | 120.9 mm |
| August | 21.7 °C | 32.8 °C | 138.18 mm |
| September | 18.9 °C | 30.4 °C | 104.65 mm |
| October | 12.8 °C | 26.1 °C | 74.17 mm |
| November | 7 °C | 21.1 °C | 70.61 mm |
| December | 4.1 °C | 17.1 °C | 98.3 mm |
| Annual | 12.5 °C | 25.3 °C | 1218.95 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 | Abnormally Dry |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |