New Boston, Texas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 52.7 °F (low) to 75.3 °F (high). Annual precipitation averages 50.2 Inches. New Boston 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 | 33.4 °F | 55.0 °F | 3.46 in. |
| February | 36.4 °F | 58.7 °F | 4.34 in. |
| March | 44.0 °F | 66.9 °F | 4.52 in. |
| April | 51.6 °F | 75.1 °F | 4.68 in. |
| May | 61.2 °F | 82.3 °F | 5.07 in. |
| June | 68.6 °F | 89.7 °F | 4.1 in. |
| July | 71.9 °F | 94.1 °F | 3.3 in. |
| August | 70.6 °F | 94.0 °F | 3.1 in. |
| September | 64.4 °F | 87.8 °F | 3.93 in. |
| October | 52.2 °F | 77.2 °F | 4.62 in. |
| November | 42.7 °F | 65.5 °F | 4.13 in. |
| December | 35.7 °F | 57.0 °F | 4.9 in. |
| Annual | 52.7 °F | 75.3 °F | 50.15 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 8b : 15°F to 20°F |
| Plant Hardiness Zone - 2012 | Zone 8a : 10°F to 15°F |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |