| 2023 Hardiness Zone: | Zone 8b: 15°F to 20°F Zone 9a: 20°F to 25°F | |
| 2012 Hardiness Zone: | Zone 8b: 15°F to 20°F | |
| 1990 Hardiness Zone: | Zone 8a: 10F to 15F | |
| 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: | 32a - Northern Blackland Prairie | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | 121 - 150 days Over 86°F |
Annual Climate Data for ZIP Code 76687 - Thornton, TX | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 35 | 39 | 47 | 54 | 62 | 69 | 72 | 71 | 66 | 55 | 45 | 37 | 55 |
| Avg Max Temp (°F) | 58 | 63 | 71 | 78 | 84 | 91 | 95 | 96 | 90 | 81 | 69 | 61 | 78 |
| Avg Precip (In.) | 2.5 | 2.65 | 3.24 | 3.39 | 5.1 | 3.24 | 2.02 | 2.01 | 2.88 | 4.39 | 3.55 | 3.44 | 38.4 |