| 2023 Hardiness Zone: | Zone 8a: 10°F to 15°F |
| 2012 Hardiness Zone: | Zone 7b: 5°F to 10°F |
| 1990 Hardiness Zone: | Zone 7a: 0F to 5F |
| Average First Frost Date: | Nov. 11 - Nov. 20 |
| Average Last Frost Date: | Mar. 21 - Mar. 31 |
| Koppen-Geiger Climate Zone: | Cfa - Humid Subtropical Climate |
| Ecoregion: | 33a - Northern Post Oak Savanna |
| Heat Zone Days: | 91 - 120 days Over 86°F |
Annual Climate Data for ZIP Code 74730 - Calera, OK | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 28 | 33 | 41 | 49 | 59 | 67 | 71 | 70 | 62 | 51 | 40 | 31 | 50 |
| Avg Max Temp (°F) | 51 | 57 | 65 | 73 | 80 | 88 | 94 | 94 | 86 | 76 | 63 | 54 | 73 |
| Avg Precip (In.) | 2.18 | 2.63 | 3.68 | 3.87 | 5.67 | 5.07 | 2.65 | 2.57 | 4.47 | 4.71 | 3.62 | 2.94 | 44.07 |