Wharton, Texas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 59.7 °F (low) to 80.1 °F (high). Annual precipitation averages 46.7 Inches. Wharton is located in USDA Plant Hardiness Zone 9b. 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 | 43.3 °F | 63.5 °F | 3.38 in. |
| February | 46.9 °F | 67.2 °F | 2.73 in. |
| March | 53.2 °F | 73.5 °F | 3.1 in. |
| April | 59.2 °F | 79.7 °F | 3.57 in. |
| May | 67.0 °F | 85.8 °F | 4.34 in. |
| June | 72.7 °F | 91.0 °F | 5.12 in. |
| July | 73.7 °F | 93.0 °F | 3.81 in. |
| August | 73.8 °F | 94.9 °F | 4.27 in. |
| September | 69.8 °F | 90.5 °F | 4.42 in. |
| October | 60.4 °F | 83.4 °F | 4.17 in. |
| November | 51.3 °F | 73.2 °F | 4.36 in. |
| December | 44.9 °F | 65.7 °F | 3.47 in. |
| Annual | 59.7 °F | 80.1 °F | 46.74 in. |
| Average First Frost Date | Jan. 1 - Jan. 10 |
| Average Last Frost Date | Jan. 21 - Jan. 31 |
| Average Days With Frost | Frost Rare |
| Plant Hardiness Zone | Zone 9b : 25°F to 20°F |
| Plant Hardiness Zone - 2012 | Zone 9a : 20°F to 25°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |