Newton, Texas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 55.2 °F (low) to 78.3 °F (high). Annual precipitation averages 59.4 Inches. Newton is located in USDA Plant Hardiness Zone 9a. The growing season typically runs from the last frost around Mar. 1 - Mar. 10 through the first frost around Nov. 11 - Nov. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 37.9 °F | 60.5 °F | 5.27 in. |
| February | 41.2 °F | 64.3 °F | 4.63 in. |
| March | 47.7 °F | 71.2 °F | 4.51 in. |
| April | 54.4 °F | 78.0 °F | 5.24 in. |
| May | 62.7 °F | 84.9 °F | 4.59 in. |
| June | 69.4 °F | 90.5 °F | 5.59 in. |
| July | 71.5 °F | 93.4 °F | 5.05 in. |
| August | 71.1 °F | 94.0 °F | 4.47 in. |
| September | 66.2 °F | 89.5 °F | 4.58 in. |
| October | 55.4 °F | 81.4 °F | 4.9 in. |
| November | 45.7 °F | 69.9 °F | 5.15 in. |
| December | 39.6 °F | 62.2 °F | 5.46 in. |
| Annual | 55.2 °F | 78.3 °F | 59.44 in. |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Mar. 1 - Mar. 10 |
| Average Days With Frost | 20-30 Days |
| Plant Hardiness Zone | Zone 9a : 20°F to 25°F |
| Plant Hardiness Zone - 2012 | Zone 8b : 15°F to 20°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |