| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 42°F | 63°F | 51°F | 3.6" |
| February | 45°F | 67°F | 55°F | 2.5" |
| March | 52°F | 74°F | 62°F | 3.4" |
| April | 59°F | 80°F | 69°F | 3.3" |
| May | 66°F | 86°F | 75°F | 5.7" |
| June | 73°F | 93°F | 82°F | 3.6" |
| July | 75°F | 94°F | 84°F | 2.9" |
| August | 75°F | 96°F | 84°F | 4.0" |
| September | 69°F | 90°F | 79°F | 2.9" |
| October | 59°F | 83°F | 70°F | 3.7" |
| November | 51°F | 72°F | 60°F | 3.6" |
| December | 44°F | 64°F | 53°F | 3.5" |
| Index | Riverside | Texas | National |
| Air quality index | 52 | 52 | 42 |
| Pollution index | 1,202,460 | 2,009,300 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 171 |
| Days with moderate air quality | 163 |
| Days w/ poor A.Q. for sensitive groups | 26 |
| Days with unhealthy air quality | 4 |
| Pollutant | Total |
| Arsenic | 0.001% |
| Benzene | 0.010% |
| Carbon Tetrachloride | 0.001% |
| Lead | 0.004% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Oakhurst, TX | 175 | 52 | 4.0% |
| Trinity, TX | 2,764 | 52 | 4.0% |
| Westwood Shores, TX | 1,821 | 52 | 4.0% |
| Huntsville, TX | 41,664 | 52 | 4.0% |
| Point Blank, TX | 875 | 52 | 4.0% |
| Riverside, TX | 458 | 52 | 4.0% |
| City | Population | Air Quality Index | National Avg. |
| Crawford, CO | 458 | 44 | 12.0% |
| Delhi, IA | 458 | 39 | 22.0% |
| Little Rock, IA | 458 | 36 | 28.0% |
| New Richmond, IN | 458 | 42 | 16.0% |
| Clayton, LA | 458 | 30 | 40.0% |
| Riverside, TX | 458 | 52 | 4.0% |
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