Ketchum, Oklahoma has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 47.7 °F (low) to 70.4 °F (high). Annual precipitation averages 46.2 Inches. Ketchum is located in USDA Plant Hardiness Zone 7a. 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 | 25.4 °F | 47.2 °F | 2.19 in. |
| February | 28.9 °F | 51.9 °F | 2.18 in. |
| March | 37.4 °F | 61.2 °F | 3.59 in. |
| April | 46.4 °F | 70.7 °F | 4.56 in. |
| May | 56.5 °F | 78.0 °F | 6.25 in. |
| June | 65.6 °F | 86.3 °F | 4.86 in. |
| July | 69.8 °F | 91.4 °F | 4.28 in. |
| August | 68.2 °F | 91.5 °F | 3.6 in. |
| September | 60.0 °F | 83.5 °F | 4.52 in. |
| October | 48.2 °F | 72.4 °F | 4.05 in. |
| November | 37.5 °F | 60.7 °F | 3.41 in. |
| December | 28.7 °F | 50.0 °F | 2.71 in. |
| Annual | 47.7 °F | 70.4 °F | 46.2 in. |
| 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 7a : 0°F to 5°F |
| Plant Hardiness Zone - 2012 | Zone 6b : -5°F to 0°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |