| 2023 Hardiness Zone: | Zone 8b: 15°F to 20°F |
| 2012 Hardiness Zone: | Zone 8b: 15°F to 20°F Zone 8a: 10°F to 15°F |
| 1990 Hardiness Zone: | Zone 7b: 5F to 10F |
| Average First Frost Date: | Nov. 11 - Nov. 20 |
| Average Last Frost Date: | Mar. 11 - Mar. 20 |
| Koppen-Geiger Climate Zone: | Cfa - Humid Subtropical Climate |
| Ecoregion: | 35a - Tertiary Uplands |
| Heat Zone Days: | 91 - 120 days Over 86°F |
Annual Climate Data for ZIP Code 75644 - Gilmer, TX | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 32 | 36 | 43 | 50 | 60 | 67 | 71 | 69 | 63 | 51 | 42 | 34 | 51 |
| Avg Max Temp (°F) | 55 | 60 | 68 | 75 | 82 | 89 | 93 | 94 | 87 | 78 | 66 | 58 | 75 |
| Avg Precip (In.) | 3.47 | 3.6 | 4.31 | 4.07 | 4.46 | 4.14 | 2.95 | 2.42 | 3.69 | 4.45 | 4.76 | 4.33 | 46.64 |