| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 47°F | 71°F | 57°F | 1.8" |
| February | 51°F | 75°F | 62°F | 0.9" |
| March | 57°F | 80°F | 68°F | 2.1" |
| April | 64°F | 86°F | 74°F | 1.5" |
| May | 70°F | 90°F | 79°F | 3.3" |
| June | 74°F | 95°F | 84°F | 2.0" |
| July | 75°F | 96°F | 85°F | 3.8" |
| August | 75°F | 98°F | 85°F | 1.8" |
| September | 72°F | 93°F | 81°F | 5.3" |
| October | 64°F | 88°F | 75°F | 1.8" |
| November | 55°F | 79°F | 66°F | 1.1" |
| December | 50°F | 72°F | 59°F | 1.3" |
| Index | Riviera | Texas | National |
| Air quality index | 30 | 52 | 42 |
| Pollution index | 1,808,440 | 2,009,300 | 2,726,193 |
| Measurement | Total |
| Days measured | 284 |
| Days with good air quality | 234 |
| Days with moderate air quality | 50 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.001% |
| Benzene | 0.030% |
| Carbon Tetrachloride | 0.000% |
| Lead | 0.003% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Sarita, TX | 386 | 30 | 40.0% |
| Kingsville, TX | 25,367 | 30 | 40.0% |
| Ricardo, TX | 886 | 30 | 40.0% |
| Riviera, TX | 473 | 30 | 40.0% |
| City | Population | Air Quality Index | National Avg. |
| Fort Yukon, AK | 473 | 38 | 24.0% |
| Courtland, CA | 473 | 52 | 4.0% |
| Canal Point, FL | 473 | 36 | 28.0% |
| Thornton, IA | 473 | 15 | 70.0% |
| Creal Springs, IL | 473 | 44 | 12.0% |
| Riviera, TX | 473 | 30 | 40.0% |
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