Bolivar Peninsula, Texas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 18.6 °C (low) to 24.3 °C (high). Annual precipitation averages 1417.6 Millimeters. Bolivar Peninsula is located in USDA Plant Hardiness Zone 10a.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 9.1 °C | 15.8 °C | 122.68 mm |
| February | 10.9 °C | 17.3 °C | 83.31 mm |
| March | 14.3 °C | 20.2 °C | 89.41 mm |
| April | 18.1 °C | 23.3 °C | 102.62 mm |
| May | 22.3 °C | 26.8 °C | 108.46 mm |
| June | 25.4 °C | 29.8 °C | 131.06 mm |
| July | 26.8 °C | 31.7 °C | 115.57 mm |
| August | 26.3 °C | 31.3 °C | 149.1 mm |
| September | 24.6 °C | 29.9 °C | 163.07 mm |
| October | 20.3 °C | 26.4 °C | 127 mm |
| November | 14.6 °C | 21.2 °C | 113.03 mm |
| December | 10.4 °C | 17.3 °C | 112.27 mm |
| Annual | 18.6 °C | 24.3 °C | 1417.58 mm |
| Average First Frost Date | Frost Rare |
| Average Last Frost Date | |
| Average Days With Frost | Frost Rare |
| Plant Hardiness Zone | Zone 10a : -1.1°C to 1.7°C |
| Plant Hardiness Zone - 2012 | Zone 9b : -3.9°C to -1.1°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |