Oklaunion, Texas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 50.3 °F (low) to 76 °F (high). Annual precipitation averages 28.2 Inches. Oklaunion is located in USDA Plant Hardiness Zone 8a. The growing season typically runs from the last frost around Mar. 21 - Mar. 31 through the first frost around Nov. 11 - Nov. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 28.4 °F | 54.2 °F | 1.15 in. |
| February | 31.7 °F | 58.1 °F | 1.34 in. |
| March | 40.0 °F | 67.0 °F | 2.12 in. |
| April | 47.9 °F | 75.6 °F | 2.58 in. |
| May | 59.0 °F | 84.2 °F | 4.09 in. |
| June | 68.5 °F | 92.6 °F | 3.5 in. |
| July | 72.2 °F | 97.1 °F | 2.36 in. |
| August | 71.2 °F | 96.8 °F | 2.38 in. |
| September | 63.4 °F | 88.6 °F | 2.85 in. |
| October | 51.2 °F | 77.7 °F | 2.74 in. |
| November | 39.3 °F | 65.1 °F | 1.68 in. |
| December | 30.2 °F | 55.0 °F | 1.43 in. |
| Annual | 50.3 °F | 76 °F | 28.22 in. |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Mar. 21 - Mar. 31 |
| Average Days With Frost | 50-75 Days |
| Plant Hardiness Zone | Zone 8a : 10°F to 15°F |
| Plant Hardiness Zone - 2012 | Zone 7b : 5°F to 10°F |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |