Devol, Oklahoma has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 10.3 °C (low) to 24.3 °C (high). Annual precipitation averages 758.7 Millimeters. 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 | -1.8 °C | 12.1 °C | 30.99 mm |
| February | 0 °C | 14.3 °C | 37.59 mm |
| March | 4.7 °C | 19.2 °C | 58.67 mm |
| April | 9.1 °C | 23.9 °C | 72.14 mm |
| May | 15.1 °C | 28.7 °C | 106.43 mm |
| June | 20.2 °C | 33.4 °C | 91.69 mm |
| July | 22.3 °C | 36.2 °C | 58.17 mm |
| August | 21.8 °C | 35.9 °C | 62.99 mm |
| September | 17.4 °C | 31.4 °C | 73.91 mm |
| October | 10.7 °C | 25.3 °C | 75.69 mm |
| November | 4.3 °C | 18.2 °C | 49.53 mm |
| December | -0.8 °C | 12.7 °C | 40.89 mm |
| Annual | 10.3 °C | 24.3 °C | 758.69 mm |
| 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 : -12.2°C to -9.4°C |
| Plant Hardiness Zone - 2012 | Zone 7b : -15°C to -12.2°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |