| 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 |
| 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: | 35a - Tertiary Uplands |
| Heat Zone Days: | 91 - 120 days Over 86°F |
Annual Climate Data for ZIP Code 75559 - De Kalb, TX | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 30 | 35 | 42 | 50 | 60 | 67 | 71 | 70 | 63 | 51 | 41 | 33 | 51 |
| Avg Max Temp (°F) | 53 | 59 | 67 | 75 | 82 | 89 | 93 | 94 | 87 | 77 | 65 | 56 | 75 |
| Avg Precip (In.) | 3.34 | 3.78 | 4.62 | 3.98 | 5.01 | 4.57 | 4.28 | 2.56 | 3.7 | 4.83 | 5.69 | 4.95 | 51.31 |