| 2023 Hardiness Zone: | Zone 9a: 20°F to 25°F Zone 9b: 25°F to 30°F | |
| 2012 Hardiness Zone: | Zone 9a: 20°F to 25°F | |
| 1990 Hardiness Zone: | Zone 8b: 15F to 20F | |
| Average First Frost Date: | Frost Rare | |
| Average Last Frost Date: | Frost Rare | |
| Koppen-Geiger Climate Zone: | Cfa - Humid Subtropical Climate | |
| Ecoregion: | 31c - Texas-Tamaulipan Thornscrub | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | 151 - 180 days Over 86°F |
Annual Climate Data for ZIP Code 78071 - Three Rivers, TX | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 42 | 46 | 53 | 59 | 67 | 72 | 73 | 73 | 69 | 60 | 51 | 44 | 59 |
| Avg Max Temp (°F) | 66 | 70 | 77 | 83 | 88 | 93 | 96 | 96 | 92 | 85 | 75 | 68 | 82 |
| Avg Precip (In.) | 1.68 | 1.52 | 1.55 | 2.23 | 3.52 | 3.44 | 1.67 | 2.77 | 3.44 | 3.11 | 1.81 | 1.43 | 28.16 |