Devol, Oklahoma has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 50.4 °F (low) to 75.7 °F (high). Annual precipitation averages 29.9 Inches. Devol 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 | 28.8 °F | 53.7 °F | 1.22 in. |
| February | 32.0 °F | 57.8 °F | 1.48 in. |
| March | 40.4 °F | 66.6 °F | 2.31 in. |
| April | 48.4 °F | 75.1 °F | 2.84 in. |
| May | 59.2 °F | 83.6 °F | 4.19 in. |
| June | 68.3 °F | 92.2 °F | 3.61 in. |
| July | 72.1 °F | 97.1 °F | 2.29 in. |
| August | 71.2 °F | 96.7 °F | 2.48 in. |
| September | 63.3 °F | 88.5 °F | 2.91 in. |
| October | 51.2 °F | 77.5 °F | 2.98 in. |
| November | 39.7 °F | 64.7 °F | 1.95 in. |
| December | 30.6 °F | 54.8 °F | 1.61 in. |
| Annual | 50.4 °F | 75.7 °F | 29.87 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 | Abnormally Dry |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |