Jonestown, Mississippi has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 52.3 °F (low) to 72.6 °F (high). Annual precipitation averages 56.2 Inches. Jonestown is located in USDA Plant Hardiness Zone 8a. 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 | 32.6 °F | 50.1 °F | 4.91 in. |
| February | 35.5 °F | 54.3 °F | 5.29 in. |
| March | 43.0 °F | 63.5 °F | 5.31 in. |
| April | 51.8 °F | 73.1 °F | 5.99 in. |
| May | 61.8 °F | 81.5 °F | 5.39 in. |
| June | 69.2 °F | 88.8 °F | 4.55 in. |
| July | 71.8 °F | 90.8 °F | 4.21 in. |
| August | 70.1 °F | 91.1 °F | 3.18 in. |
| September | 63.2 °F | 86.2 °F | 3.16 in. |
| October | 51.5 °F | 75.9 °F | 3.88 in. |
| November | 41.2 °F | 62.5 °F | 4.46 in. |
| December | 35.5 °F | 52.8 °F | 5.86 in. |
| Annual | 52.3 °F | 72.6 °F | 56.19 in. |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Mar. 11 - Mar. 20 |
| Average Days With Frost | 40-50 Days |
| Plant Hardiness Zone | Zone 8a : 10°F to 15°F |
| Plant Hardiness Zone - 2012 | Zone 8a : 10°F to 15°F |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |