| 2023 Hardiness Zone: | Zone 7b: 5°F to 10°F |
| 2012 Hardiness Zone: | Zone 7a: 0°F to 5°F |
| 1990 Hardiness Zone: | Zone 7a: 0F to 5F |
| Average First Frost Date: | Nov. 11 - Nov. 20 |
| Average Last Frost Date: | Apr. 1 - Apr. 10 |
| Koppen-Geiger Climate Zone: | Cfa - Humid Subtropical Climate |
| Ecoregion: | 29a - Cross Timbers |
| Heat Zone Days: | 91 - 120 days Over 86°F |
Annual Climate Data for ZIP Code 74857 - Newalla, OK | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 25 | 30 | 38 | 48 | 58 | 66 | 70 | 69 | 61 | 50 | 38 | 28 | 48 |
| Avg Max Temp (°F) | 48 | 55 | 63 | 72 | 80 | 87 | 93 | 93 | 85 | 75 | 61 | 51 | 72 |
| Avg Precip (In.) | 1.38 | 2 | 3.27 | 3.53 | 5.67 | 4.6 | 2.56 | 2.42 | 4.13 | 3.95 | 2.91 | 2.07 | 38.49 |