| 2023 Hardiness Zone: | Zone 9a: 20°F to 25°F |
| 2012 Hardiness Zone: | Zone 9a: 20°F to 25°F |
| 1990 Hardiness Zone: | Zone 8b: 15F to 20F |
| Average First Frost Date: | Dec. 1 - Dec. 10 |
| Average Last Frost Date: | Feb. 21 - Feb. 29 |
| Koppen-Geiger Climate Zone: | Cfa - Humid Subtropical Climate |
| Ecoregion: | 35f - Flatwoods |
| Heat Zone Days: | 121 - 150 days Over 86°F |
Annual Climate Data for ZIP Code 77659 - Sour Lake, TX | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 41 | 43 | 50 | 57 | 65 | 71 | 73 | 72 | 67 | 57 | 49 | 42 | 57 |
| Avg Max Temp (°F) | 61 | 65 | 72 | 78 | 85 | 90 | 93 | 93 | 89 | 81 | 71 | 64 | 78 |
| Avg Precip (In.) | 5.15 | 3.54 | 3.97 | 3.56 | 5.56 | 6.61 | 4.57 | 4.3 | 5.72 | 4.91 | 4.76 | 4.98 | 57.62 |