| 2023 Hardiness Zone: | Zone 8b: 15°F to 20°F 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: | Mar. 21 - Mar. 31 |
| Koppen-Geiger Climate Zone: | Cfa - Humid Subtropical Climate |
| Ecoregion: | 29d - Grand Prairie |
| Heat Zone Days: | 91 - 120 days Over 86°F |
Annual Climate Data for ZIP Code 76234 - Decatur, TX | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 29 | 34 | 42 | 50 | 60 | 67 | 71 | 70 | 63 | 52 | 41 | 32 | 51 |
| Avg Max Temp (°F) | 54 | 60 | 68 | 76 | 83 | 91 | 96 | 96 | 88 | 78 | 65 | 57 | 76 |
| Avg Precip (In.) | 1.64 | 2.16 | 2.84 | 3.04 | 5.19 | 3.7 | 2.29 | 2.2 | 3.3 | 4.45 | 2.56 | 2.27 | 35.65 |