Oak Valley, Texas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 55.2 °F (low) to 77.2 °F (high). Annual precipitation averages 41.7 Inches. Oak Valley is located in USDA Plant Hardiness Zone 8b. The growing season typically runs from the last frost around Mar. 1 - Mar. 10 through the first frost around Nov. 11 - Nov. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 35.8 °F | 57.7 °F | 3.08 in. |
| February | 39.5 °F | 61.8 °F | 3.21 in. |
| March | 46.7 °F | 68.7 °F | 3.85 in. |
| April | 53.7 °F | 76.1 °F | 3.78 in. |
| May | 63.3 °F | 83.3 °F | 4.37 in. |
| June | 70.8 °F | 90.7 °F | 3.95 in. |
| July | 73.6 °F | 94.9 °F | 2.0 in. |
| August | 73.3 °F | 95.9 °F | 2.51 in. |
| September | 66.5 °F | 89.8 °F | 3.18 in. |
| October | 55.7 °F | 79.5 °F | 5.01 in. |
| November | 45.5 °F | 68.0 °F | 3.22 in. |
| December | 37.8 °F | 59.6 °F | 3.57 in. |
| Annual | 55.2 °F | 77.2 °F | 41.73 in. |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Mar. 1 - Mar. 10 |
| Average Days With Frost | 30-40 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 | Abnormally Dry |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |