River Oaks, Texas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 13.4 °C (low) to 25.1 °C (high). Annual precipitation averages 929.9 Millimeters. River Oaks is located in USDA Plant Hardiness Zone 8b. The growing season typically runs from the last frost around Feb. 21 - Feb. 29 through the first frost around Nov. 21 - Nov. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 2.2 °C | 13.9 °C | 59.69 mm |
| February | 4.2 °C | 16.1 °C | 64.26 mm |
| March | 8.4 °C | 20.3 °C | 86.36 mm |
| April | 12.6 °C | 24.7 °C | 78.49 mm |
| May | 17.9 °C | 28.9 °C | 104.9 mm |
| June | 22.3 °C | 33.3 °C | 98.55 mm |
| July | 24.2 °C | 35.8 °C | 52.83 mm |
| August | 24.1 °C | 35.9 °C | 61.21 mm |
| September | 20 °C | 31.9 °C | 79.5 mm |
| October | 13.9 °C | 26.3 °C | 105.41 mm |
| November | 8.1 °C | 19.6 °C | 70.61 mm |
| December | 3.3 °C | 14.8 °C | 68.07 mm |
| Annual | 13.4 °C | 25.1 °C | 929.88 mm |
| Average First Frost Date | Nov. 21 - Nov. 30 |
| Average Last Frost Date | Feb. 21 - Feb. 29 |
| Average Days With Frost | 20-30 Days |
| Plant Hardiness Zone | Zone 8b : -9.4°C to -6.7°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 |