| 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 8b: 15F to 20F | |
| Average First Frost Date: | Nov. 11 - Nov. 20 | |
| Average Last Frost Date: | Mar. 11 - Mar. 20 | |
| Koppen-Geiger Climate Zone: | Cfa - Humid Subtropical Climate | |
| Ecoregion: | 33b - Southern Post Oak Savanna | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | 121 - 150 days Over 86°F |
Annual Climate Data for ZIP Code 77879 - Somerville, TX | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 37 | 41 | 49 | 56 | 64 | 71 | 73 | 72 | 67 | 57 | 48 | 39 | 56 |
| Avg Max Temp (°F) | 61 | 65 | 73 | 80 | 86 | 92 | 96 | 97 | 91 | 82 | 71 | 63 | 80 |
| Avg Precip (In.) | 3.12 | 2.69 | 2.85 | 3.16 | 5.01 | 4.19 | 1.84 | 2.53 | 4.08 | 4.29 | 3.56 | 3.18 | 40.51 |