Terral, Oklahoma has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 50.5 °F (low) to 75.7 °F (high). Annual precipitation averages 33.8 Inches. Terral 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. 1 - Nov. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 28.9 °F | 54.6 °F | 1.51 in. |
| February | 32.7 °F | 58.1 °F | 2.01 in. |
| March | 41.3 °F | 66.9 °F | 2.69 in. |
| April | 49.0 °F | 75.1 °F | 2.92 in. |
| May | 59.4 °F | 82.7 °F | 4.46 in. |
| June | 68.1 °F | 91.0 °F | 3.99 in. |
| July | 71.7 °F | 96.1 °F | 2.11 in. |
| August | 70.7 °F | 96.4 °F | 2.48 in. |
| September | 62.9 °F | 88.5 °F | 3.57 in. |
| October | 50.9 °F | 77.7 °F | 3.73 in. |
| November | 39.8 °F | 65.6 °F | 2.25 in. |
| December | 30.5 °F | 55.6 °F | 2.06 in. |
| Annual | 50.5 °F | 75.7 °F | 33.78 in. |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| 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 | Abnormally Dry |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |