Goodwell, Oklahoma has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 41.4 °F (low) to 70.9 °F (high). Annual precipitation averages 17 Inches. Goodwell is located in USDA Plant Hardiness Zone 6b. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 20.6 °F | 49.1 °F | 0.34 in. |
| February | 22.6 °F | 52.0 °F | 0.33 in. |
| March | 30.1 °F | 61.3 °F | 1.11 in. |
| April | 38.3 °F | 69.1 °F | 1.38 in. |
| May | 49.1 °F | 79.3 °F | 2.25 in. |
| June | 60.2 °F | 89.5 °F | 2.26 in. |
| July | 64.8 °F | 93.6 °F | 2.56 in. |
| August | 62.9 °F | 91.4 °F | 2.72 in. |
| September | 54.9 °F | 84.6 °F | 1.27 in. |
| October | 41.8 °F | 71.9 °F | 1.7 in. |
| November | 30.0 °F | 59.7 °F | 0.42 in. |
| December | 21.7 °F | 48.9 °F | 0.62 in. |
| Annual | 41.4 °F | 70.9 °F | 16.96 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 6b : -5°F to 0°F |
| Plant Hardiness Zone - 2012 | Zone 6b : -5°F to 0°F |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |