Jamaica Beach, Texas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 18.7 °C (low) to 24.5 °C (high). Annual precipitation averages 1328.4 Millimeters. Jamaica Beach is located in USDA Plant Hardiness Zone 10a.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 9.3 °C | 16.2 °C | 109.98 mm |
| February | 11.1 °C | 17.7 °C | 75.18 mm |
| March | 14.6 °C | 20.6 °C | 81.53 mm |
| April | 18.3 °C | 23.9 °C | 93.47 mm |
| May | 22.5 °C | 27.4 °C | 97.03 mm |
| June | 25.4 °C | 30.4 °C | 124.21 mm |
| July | 26.3 °C | 31.4 °C | 104.9 mm |
| August | 26.3 °C | 31.7 °C | 146.56 mm |
| September | 24.4 °C | 29.9 °C | 166.37 mm |
| October | 20.3 °C | 26.4 °C | 117.35 mm |
| November | 15.1 °C | 21.5 °C | 109.47 mm |
| December | 10.4 °C | 17.4 °C | 102.36 mm |
| Annual | 18.7 °C | 24.5 °C | 1328.41 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 |