Jacksonville, Texas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 55.5 °F (low) to 76.9 °F (high). Annual precipitation averages 48.2 Inches. Jacksonville 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 | 37.5 °F | 58.2 °F | 3.98 in. |
| February | 40.7 °F | 62.3 °F | 3.88 in. |
| March | 47.5 °F | 69.7 °F | 4.41 in. |
| April | 54.0 °F | 76.8 °F | 4.12 in. |
| May | 63.2 °F | 83.6 °F | 4.82 in. |
| June | 70.2 °F | 90.0 °F | 4.63 in. |
| July | 72.9 °F | 93.5 °F | 2.71 in. |
| August | 72.4 °F | 94.3 °F | 3.39 in. |
| September | 66.5 °F | 88.5 °F | 3.42 in. |
| October | 56.1 °F | 79.1 °F | 4.15 in. |
| November | 46.2 °F | 67.6 °F | 4.08 in. |
| December | 39.2 °F | 59.7 °F | 4.58 in. |
| Annual | 55.5 °F | 76.9 °F | 48.17 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 8b : 15°F to 20°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |