Simonton, Texas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 59.1 °F (low) to 79.9 °F (high). Annual precipitation averages 49.3 Inches. Simonton is located in USDA Plant Hardiness Zone 9a. The growing season typically runs from the last frost around Jan. 21 - Jan. 31 through the first frost around Jan. 1 - Jan. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 42.4 °F | 62.9 °F | 3.77 in. |
| February | 46.1 °F | 66.6 °F | 2.87 in. |
| March | 52.4 °F | 73.2 °F | 3.55 in. |
| April | 58.5 °F | 79.5 °F | 3.89 in. |
| May | 66.6 °F | 86.2 °F | 4.83 in. |
| June | 72.4 °F | 91.1 °F | 4.91 in. |
| July | 73.7 °F | 93.4 °F | 3.38 in. |
| August | 73.6 °F | 95.2 °F | 4.68 in. |
| September | 69.3 °F | 90.3 °F | 4.65 in. |
| October | 59.5 °F | 82.6 °F | 4.57 in. |
| November | 50.3 °F | 72.5 °F | 4.3 in. |
| December | 43.8 °F | 64.9 °F | 3.86 in. |
| Annual | 59.1 °F | 79.9 °F | 49.26 in. |
| Average First Frost Date | Jan. 1 - Jan. 10 |
| Average Last Frost Date | Jan. 21 - Jan. 31 |
| Average Days With Frost | 10-20 Days |
| Plant Hardiness Zone | Zone 9a : 20°F to 25°F |
| Plant Hardiness Zone - 2012 | Zone 9a : 20°F to 25°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |