South Padre Island, Texas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 20.6 °C (low) to 26.3 °C (high). Annual precipitation averages 646.7 Millimeters. South Padre Island is located in USDA Plant Hardiness Zone 10b.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 12.7 °C | 19.6 °C | 40.39 mm |
| February | 14.3 °C | 20.8 °C | 31.5 mm |
| March | 17.2 °C | 22.9 °C | 37.59 mm |
| April | 20.4 °C | 25.5 °C | 33.27 mm |
| May | 23.6 °C | 28.6 °C | 46.48 mm |
| June | 25.7 °C | 30.7 °C | 51.82 mm |
| July | 26.2 °C | 31.4 °C | 35.05 mm |
| August | 26.6 °C | 31.8 °C | 45.72 mm |
| September | 25.4 °C | 30.8 °C | 148.84 mm |
| October | 22.9 °C | 28.1 °C | 77.72 mm |
| November | 18 °C | 24.3 °C | 50.8 mm |
| December | 13.7 °C | 20.7 °C | 47.5 mm |
| Annual | 20.6 °C | 26.3 °C | 646.68 mm |
| Average First Frost Date | Frost Rare |
| Average Last Frost Date | |
| Average Days With Frost | Frost Free |
| Plant Hardiness Zone | Zone 10b : 1.7°C to 4.4°C |
| Plant Hardiness Zone - 2012 | Zone 10a : -1.1°C to 1.7°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |