Tiki Island, Texas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 18.3 °C (low) to 24.4 °C (high). Annual precipitation averages 1370.8 Millimeters. Tiki Island is located in USDA Plant Hardiness Zone 10a.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 8.9 °C | 16.1 °C | 114.55 mm |
| February | 10.8 °C | 17.5 °C | 78.23 mm |
| March | 14.3 °C | 20.4 °C | 84.07 mm |
| April | 17.9 °C | 23.8 °C | 100.08 mm |
| May | 22.2 °C | 27.2 °C | 97.54 mm |
| June | 25.2 °C | 30.2 °C | 126.75 mm |
| July | 26.2 °C | 31.1 °C | 106.17 mm |
| August | 26 °C | 31.5 °C | 150.37 mm |
| September | 24.2 °C | 29.7 °C | 168.4 mm |
| October | 19.9 °C | 26 °C | 123.95 mm |
| November | 14.4 °C | 21.3 °C | 113.28 mm |
| December | 10 °C | 17.4 °C | 107.44 mm |
| Annual | 18.3 °C | 24.4 °C | 1370.83 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 |