Cookson, Oklahoma has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 9.2 °C (low) to 21.5 °C (high). Annual precipitation averages 1242.8 Millimeters. Cookson is located in USDA Plant Hardiness Zone 7b. The growing season typically runs from the last frost around Apr. 1 - Apr. 10 through the first frost around Nov. 1 - Nov. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -2.7 °C | 9.3 °C | 68.33 mm |
| February | -0.8 °C | 11.7 °C | 64.01 mm |
| March | 3.9 °C | 16.5 °C | 107.95 mm |
| April | 8.3 °C | 21.4 °C | 123.19 mm |
| May | 13.8 °C | 25.3 °C | 153.16 mm |
| June | 18.8 °C | 29.9 °C | 128.78 mm |
| July | 20.9 °C | 33.1 °C | 98.81 mm |
| August | 20.3 °C | 32.9 °C | 93.73 mm |
| September | 16.1 °C | 29 °C | 115.32 mm |
| October | 9.6 °C | 22.6 °C | 116.08 mm |
| November | 3.8 °C | 16.4 °C | 96.52 mm |
| December | -1.1 °C | 10.3 °C | 76.96 mm |
| Annual | 9.2 °C | 21.5 °C | 1242.84 mm |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 50-75 Days |
| Plant Hardiness Zone | Zone 7b : -15°C to -12.2°C |
| Plant Hardiness Zone - 2012 | Zone 7a : -17.8°C to -15°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |