Riviera, Texas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 61.9 °F (low) to 83.8 °F (high). Annual precipitation averages 27.6 Inches. Riviera is located in USDA Plant Hardiness Zone 9b.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 46.0 °F | 68.9 °F | 1.24 in. |
| February | 50.0 °F | 73.2 °F | 1.41 in. |
| March | 56.3 °F | 78.2 °F | 1.74 in. |
| April | 62.3 °F | 84.5 °F | 1.51 in. |
| May | 69.6 °F | 89.3 °F | 2.69 in. |
| June | 73.7 °F | 93.8 °F | 3.25 in. |
| July | 74.4 °F | 95.4 °F | 2.59 in. |
| August | 74.5 °F | 96.6 °F | 2.4 in. |
| September | 71.2 °F | 91.7 °F | 5.08 in. |
| October | 63.0 °F | 86.1 °F | 2.72 in. |
| November | 54.4 °F | 77.3 °F | 1.38 in. |
| December | 47.8 °F | 70.5 °F | 1.56 in. |
| Annual | 61.9 °F | 83.8 °F | 27.57 in. |
| Average First Frost Date | Frost Rare |
| Average Last Frost Date | |
| Average Days With Frost | Frost Rare |
| Plant Hardiness Zone | Zone 9b : 25°F to 20°F |
| Plant Hardiness Zone - 2012 | Zone 9b : 25°F to 20°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |