Clarendon, Texas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 45.4 °F (low) to 73.4 °F (high). Annual precipitation averages 24.5 Inches. Clarendon is located in USDA Plant Hardiness Zone 7a. The growing season typically runs from the last frost around Apr. 1 - Apr. 10 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 24.7 °F | 52.6 °F | 0.76 in. |
| February | 27.3 °F | 56.5 °F | 0.8 in. |
| March | 34.8 °F | 65.0 °F | 1.47 in. |
| April | 43.4 °F | 73.5 °F | 2.11 in. |
| May | 53.6 °F | 81.1 °F | 3.49 in. |
| June | 63.4 °F | 89.6 °F | 3.6 in. |
| July | 67.4 °F | 93.9 °F | 2.39 in. |
| August | 65.9 °F | 92.9 °F | 3.28 in. |
| September | 58.2 °F | 85.0 °F | 2.51 in. |
| October | 46.0 °F | 74.8 °F | 2.1 in. |
| November | 34.2 °F | 62.8 °F | 1.04 in. |
| December | 26.1 °F | 53.2 °F | 0.93 in. |
| Annual | 45.4 °F | 73.4 °F | 24.48 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 75-100 Days |
| Plant Hardiness Zone | Zone 7a : 0°F to 5°F |
| Plant Hardiness Zone - 2012 | Zone 7a : 0°F to 5°F |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |