| 2023 Hardiness Zone: | Zone 9b: 25°F to 30°F Zone 10a: 30°F to 35°F |
| 2012 Hardiness Zone: | Zone 9b: 25°F to 30°F |
| 1990 Hardiness Zone: | Zone 9a: 20F to 25F |
| Average First Frost Date: | Frost Rare |
| Average Last Frost Date: | Frost Rare |
| Koppen-Geiger Climate Zone: | Cfa - Humid Subtropical Climate |
| Ecoregion: | 34h - Mid-Coast Barrier Islands and Coastal Marshes |
| Heat Zone Days: | 61 - 90 days Over 86°F |
Annual Climate Data for ZIP Code 77650 - Port Bolivar, TX | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 49 | 51 | 58 | 64 | 72 | 77 | 79 | 79 | 75 | 68 | 59 | 51 | 65 |
| Avg Max Temp (°F) | 62 | 64 | 70 | 75 | 81 | 87 | 89 | 89 | 86 | 80 | 71 | 64 | 76 |
| Avg Precip (In.) | 4.12 | 2.63 | 2.8 | 2.63 | 3.78 | 4.09 | 3.49 | 4.27 | 5.81 | 3.5 | 3.71 | 3.57 | 44.4 |