River Oaks, Texas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 56.2 °F (low) to 77.2 °F (high). Annual precipitation averages 36.6 Inches. 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 | 35.9 °F | 57.0 °F | 2.35 in. |
| February | 39.5 °F | 60.9 °F | 2.53 in. |
| March | 47.2 °F | 68.5 °F | 3.4 in. |
| April | 54.7 °F | 76.5 °F | 3.09 in. |
| May | 64.3 °F | 84.0 °F | 4.13 in. |
| June | 72.2 °F | 92.0 °F | 3.88 in. |
| July | 75.6 °F | 96.5 °F | 2.08 in. |
| August | 75.4 °F | 96.6 °F | 2.41 in. |
| September | 68.0 °F | 89.4 °F | 3.13 in. |
| October | 57.0 °F | 79.3 °F | 4.15 in. |
| November | 46.6 °F | 67.2 °F | 2.78 in. |
| December | 38.0 °F | 58.6 °F | 2.68 in. |
| Annual | 56.2 °F | 77.2 °F | 36.61 in. |
| 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 : 15°F to 20°F |
| Plant Hardiness Zone - 2012 | Zone 8a : 10°F to 15°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |