| 2023 Hardiness Zone: | Zone 8a: 10°F to 15°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: | Nov. 1 - Nov. 10 |
| Average Last Frost Date: | Apr. 1 - Apr. 10 |
| Koppen-Geiger Climate Zone: | Cfa - Humid Subtropical Climate |
| Ecoregion: | 29c - Western Cross Timbers |
| Heat Zone Days: | 121 - 150 days Over 86°F |
Annual Climate Data for ZIP Code 76450 - Graham, TX | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 27 | 33 | 41 | 49 | 59 | 68 | 71 | 70 | 62 | 50 | 39 | 29 | 50 |
| Avg Max Temp (°F) | 55 | 60 | 69 | 77 | 84 | 91 | 97 | 96 | 89 | 79 | 66 | 57 | 77 |
| Avg Precip (In.) | 1.2 | 1.77 | 2.18 | 2.48 | 4.54 | 3.59 | 2.12 | 2.32 | 3.56 | 3.68 | 1.92 | 1.81 | 31.18 |