| 2023 Hardiness Zone: | Zone 8a: 10°F to 15°F Zone 7b: 5°F to 10°F |
| 2012 Hardiness Zone: | Zone 8a: 10°F to 15°F Zone 7b: 5°F to 10°F |
| 1990 Hardiness Zone: | Zone 7b: 5F to 10F |
| Average First Frost Date: | Oct. 21 - Oct. 31 |
| Average Last Frost Date: | Apr. 11 - Apr. 20 |
| Koppen-Geiger Climate Zone: | Cfa - Humid Subtropical Climate |
| Ecoregion: | 35d - Cretaceous Dissected Uplands |
| Heat Zone Days: | 91 - 120 days Over 86°F |
Annual Climate Data for ZIP Code 74728 - Broken Bow, OK | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 29 | 33 | 41 | 48 | 58 | 66 | 70 | 69 | 62 | 50 | 40 | 32 | 50 |
| Avg Max Temp (°F) | 52 | 58 | 66 | 74 | 81 | 89 | 93 | 94 | 87 | 77 | 64 | 55 | 74 |
| Avg Precip (In.) | 3.01 | 3.46 | 4.67 | 4.36 | 6.25 | 4.54 | 3.75 | 2.57 | 4.43 | 5.06 | 5.25 | 4.76 | 52.12 |