| 2023 Hardiness Zone: | Zone 7b: 5°F to 10°F Zone 7a: 0°F to 5°F |
| 2012 Hardiness Zone: | Zone 6b: -5°F to 0°F Zone 7a: 0°F to 5°F |
| 1990 Hardiness Zone: | Zone 6b: -5F to 0F |
| 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: | 39a - Springfield Plateau |
| Heat Zone Days: | 61 - 90 days Over 86°F |
Annual Climate Data for ZIP Code 74960 - Stilwell, OK | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 26 | 31 | 39 | 47 | 56 | 64 | 68 | 66 | 60 | 49 | 39 | 29 | 48 |
| Avg Max Temp (°F) | 47 | 53 | 62 | 71 | 77 | 84 | 90 | 90 | 82 | 72 | 59 | 50 | 70 |
| Avg Precip (In.) | 2.41 | 2.71 | 4.5 | 4.69 | 5.85 | 5.01 | 3.19 | 3.41 | 4.88 | 4.16 | 4.77 | 3.45 | 49.04 |