| 2023 Hardiness Zone: | Zone 7b: 5°F to 10°F Zone 7a: 0°F to 5°F |
| 2012 Hardiness Zone: | 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: | 29a - Cross Timbers |
| Heat Zone Days: | 91 - 120 days Over 86°F |
Annual Climate Data for ZIP Code 74020 - Cleveland, OK | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 24 | 29 | 38 | 48 | 57 | 66 | 70 | 69 | 61 | 50 | 38 | 29 | 48 |
| Avg Max Temp (°F) | 46 | 53 | 63 | 73 | 79 | 87 | 93 | 93 | 85 | 75 | 60 | 50 | 72 |
| Avg Precip (In.) | 1.41 | 1.96 | 3.49 | 3.69 | 5.45 | 4.35 | 2.96 | 3.2 | 4.61 | 3.41 | 3.21 | 2.02 | 39.76 |