Sheldon, Texas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 61.3 °F (low) to 78.8 °F (high). Annual precipitation averages 57.9 Inches. Sheldon is located in USDA Plant Hardiness Zone 9b.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 44.3 °F | 62.9 °F | 4.52 in. |
| February | 47.8 °F | 66.4 °F | 3.45 in. |
| March | 54.5 °F | 71.9 °F | 3.83 in. |
| April | 61.1 °F | 78.0 °F | 4.12 in. |
| May | 68.6 °F | 84.5 °F | 5.56 in. |
| June | 74.5 °F | 90.1 °F | 5.97 in. |
| July | 76.3 °F | 92.3 °F | 4.23 in. |
| August | 76.0 °F | 92.9 °F | 5.99 in. |
| September | 71.6 °F | 88.7 °F | 5.36 in. |
| October | 62.5 °F | 81.4 °F | 5.76 in. |
| November | 52.7 °F | 71.6 °F | 4.72 in. |
| December | 46.1 °F | 64.6 °F | 4.38 in. |
| Annual | 61.3 °F | 78.8 °F | 57.89 in. |
| Average First Frost Date | Frost Rare |
| Average Last Frost Date | |
| 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 |