Runaway Bay, Texas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 11.3 °C (low) to 24.5 °C (high). Annual precipitation averages 868.7 Millimeters. Runaway Bay is located in USDA Plant Hardiness Zone 8a. The growing season typically runs from the last frost around Mar. 11 - Mar. 20 through the first frost around Nov. 11 - Nov. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -0.1 °C | 13.3 °C | 44.96 mm |
| February | 2.1 °C | 15.3 °C | 58.17 mm |
| March | 6.3 °C | 19.9 °C | 73.66 mm |
| April | 10.4 °C | 24.2 °C | 78.99 mm |
| May | 16 °C | 28 °C | 105.66 mm |
| June | 20.5 °C | 32.6 °C | 97.54 mm |
| July | 22.3 °C | 35.2 °C | 58.93 mm |
| August | 21.9 °C | 35.3 °C | 60.45 mm |
| September | 17.8 °C | 31.2 °C | 82.55 mm |
| October | 11.3 °C | 25.6 °C | 96.52 mm |
| November | 5.7 °C | 19 °C | 55.88 mm |
| December | 0.9 °C | 14.1 °C | 55.37 mm |
| Annual | 11.3 °C | 24.5 °C | 868.68 mm |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Mar. 11 - Mar. 20 |
| Average Days With Frost | 50-75 Days |
| Plant Hardiness Zone | Zone 8a : -12.2°C to -9.4°C |
| Plant Hardiness Zone - 2012 | Zone 8a : -12.2°C to -9.4°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |