| 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. 11 - Nov. 20 |
| Average Last Frost Date: | Apr. 1 - Apr. 10 |
| Koppen-Geiger Climate Zone: | Cfa - Humid Subtropical Climate |
| Ecoregion: | 27h - Red Prairie |
| Heat Zone Days: | 121 - 150 days Over 86°F |
Annual Climate Data for ZIP Code 79520 - Hamlin, TX | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 29 | 33 | 40 | 49 | 59 | 67 | 71 | 70 | 63 | 52 | 39 | 31 | 50 |
| Avg Max Temp (°F) | 55 | 61 | 69 | 78 | 86 | 92 | 96 | 95 | 87 | 78 | 65 | 57 | 77 |
| Avg Precip (In.) | .87 | 1.33 | 1.2 | 1.73 | 3.38 | 2.75 | 1.94 | 2.51 | 3.37 | 2.6 | 1.16 | 1.09 | 23.93 |