Ingleside, Texas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 18.8 °C (low) to 26.1 °C (high). Annual precipitation averages 897.9 Millimeters. Ingleside is located in USDA Plant Hardiness Zone 10a.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 9.5 °C | 18 °C | 50.29 mm |
| February | 11.7 °C | 19.7 °C | 44.7 mm |
| March | 15.1 °C | 22.4 °C | 61.21 mm |
| April | 18.8 °C | 25.8 °C | 47.24 mm |
| May | 22.7 °C | 28.7 °C | 87.12 mm |
| June | 25.6 °C | 31.3 °C | 89.92 mm |
| July | 26.3 °C | 32 °C | 69.85 mm |
| August | 26.2 °C | 32.6 °C | 71.37 mm |
| September | 24.2 °C | 31.4 °C | 146.56 mm |
| October | 20.4 °C | 28.2 °C | 107.19 mm |
| November | 14.8 °C | 23.2 °C | 66.55 mm |
| December | 10.7 °C | 19.3 °C | 55.88 mm |
| Annual | 18.8 °C | 26.1 °C | 897.88 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 |