Newton, Mississippi has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 51.9 °F (low) to 75.6 °F (high). Annual precipitation averages 58.7 Inches. Newton 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. 1 - Nov. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 34.3 °F | 56.8 °F | 5.76 in. |
| February | 37.4 °F | 61.3 °F | 5.28 in. |
| March | 43.7 °F | 68.8 °F | 5.71 in. |
| April | 50.6 °F | 75.6 °F | 6.0 in. |
| May | 59.4 °F | 82.7 °F | 4.19 in. |
| June | 67.0 °F | 89.4 °F | 4.69 in. |
| July | 69.7 °F | 91.0 °F | 5.08 in. |
| August | 68.7 °F | 90.9 °F | 4.74 in. |
| September | 63.2 °F | 87.0 °F | 3.5 in. |
| October | 51.3 °F | 77.7 °F | 3.6 in. |
| November | 40.9 °F | 66.9 °F | 4.67 in. |
| December | 36.4 °F | 59.1 °F | 5.46 in. |
| Annual | 51.9 °F | 75.6 °F | 58.68 in. |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| Average Last Frost Date | Mar. 11 - Mar. 20 |
| Average Days With Frost | 40-50 Days |
| Plant Hardiness Zone | Zone 8b : 15°F to 20°F |
| Plant Hardiness Zone - 2012 | Zone 8a : 10°F to 15°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |