Broken Bow, Oklahoma has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 50.4 °F (low) to 74.4 °F (high). Annual precipitation averages 53.4 Inches. Broken Bow 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. 1 - Nov. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 30.4 °F | 53.9 °F | 3.71 in. |
| February | 33.9 °F | 58.1 °F | 3.96 in. |
| March | 41.0 °F | 66.0 °F | 4.57 in. |
| April | 48.6 °F | 74.1 °F | 5.45 in. |
| May | 58.3 °F | 81.1 °F | 6.33 in. |
| June | 66.9 °F | 88.7 °F | 4.23 in. |
| July | 70.1 °F | 93.1 °F | 3.41 in. |
| August | 69.0 °F | 93.5 °F | 3.46 in. |
| September | 62.4 °F | 87.3 °F | 4.19 in. |
| October | 50.3 °F | 76.6 °F | 4.89 in. |
| November | 40.4 °F | 64.9 °F | 4.5 in. |
| December | 32.9 °F | 55.8 °F | 4.68 in. |
| Annual | 50.4 °F | 74.4 °F | 53.38 in. |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| Average Last Frost Date | Mar. 21 - Mar. 31 |
| Average Days With Frost | 75-100 Days |
| Plant Hardiness Zone | Zone 8a : 10°F to 15°F |
| Plant Hardiness Zone - 2012 | Zone 8a : 10°F to 15°F |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |