| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 49°F | 65°F | 56°F | 5.1" |
| February | 53°F | 68°F | 59°F | 2.1" |
| March | 60°F | 75°F | 67°F | 11.8" |
| April | 64°F | 78°F | 70°F | 5.1" |
| May | 71°F | 84°F | 77°F | 4.6" |
| June | 78°F | 90°F | 83°F | 4.8" |
| July | 78°F | 90°F | 84°F | 16.3" |
| August | 79°F | 93°F | 86°F | 2.9" |
| September | 77°F | 91°F | 83°F | 14.2" |
| October | 67°F | 85°F | 75°F | 4.6" |
| November | 59°F | 76°F | 67°F | 7.2" |
| December | 50°F | 70°F | 60°F | 2.0" |
| Index | Bayside | Texas | National |
| Air quality index | 42 | 52 | 42 |
| Pollution index | 1,901,300 | 2,009,300 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 262 |
| Days with moderate air quality | 102 |
| Days w/ poor A.Q. for sensitive groups | 1 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.001% |
| Benzene | 0.020% |
| Carbon Tetrachloride | 0.001% |
| Lead | 0.020% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Gregory, TX | 2,302 | 42 | 16.0% |
| Rockport, TX | 11,194 | 42 | 16.0% |
| Holiday Beach, TX | 386 | 42 | 16.0% |
| Aransas Pass, TX | 9,480 | 42 | 16.0% |
| Portland, TX | 18,353 | 42 | 16.0% |
| Bayside, TX | 444 | 42 | 16.0% |
| City | Population | Air Quality Index | National Avg. |
| Cushman, AR | 444 | 36 | 28.0% |
| Cutler, IL | 444 | 43 | 14.0% |
| Pioneer, LA | 444 | 34 | 32.0% |
| Lennon, MI | 444 | 38 | 24.0% |
| Chamois, MO | 444 | 39 | 22.0% |
| Bayside, TX | 444 | 42 | 16.0% |
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