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| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 51°F | 64°F | 57°F | 1.9" |
| February | 54°F | 67°F | 60°F | 2.3" |
| March | 61°F | 72°F | 66°F | 6.0" |
| April | 68°F | 78°F | 73°F | 4.2" |
| May | 74°F | 83°F | 78°F | 14.1" |
| June | 79°F | 88°F | 83°F | 10.7" |
| July | 80°F | 89°F | 84°F | 7.7" |
| August | 81°F | 90°F | 85°F | 9.1" |
| September | 78°F | 88°F | 82°F | 6.0" |
| October | 72°F | 83°F | 77°F | 6.0" |
| November | 62°F | 74°F | 68°F | 4.5" |
| December | 54°F | 67°F | 60°F | 1.7" |
| Index | Port Aransas | Texas | National |
| Air quality index | 42 | 52 | 42 |
| Pollution index | 11,617,000 | 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 | 0.010% |
| Benzene | 0.140% |
| Carbon Tetrachloride | 0.230% |
| Lead | 0.020% |
| Mercury | 0.020% |
| City | Population | Air Quality Index | National Avg. |
| Falman, TX | 8 | 42 | 16.0% |
| Portland, TX | 17,807 | 42 | 16.0% |
| Gregory, TX | 2,218 | 42 | 16.0% |
| Rockport, TX | 10,815 | 42 | 16.0% |
| Aransas Pass, TX | 9,269 | 42 | 16.0% |
| Port Aransas, TX | 4,203 | 42 | 16.0% |
| City | Population | Air Quality Index | National Avg. |
| Caseyville, IL | 4,203 | 54 | 8.0% |
| Tazewell, VA | 4,203 | 295 | 490.0% |
| Saint-Antonin, QC | 4,204 | n/a | |
| Shallotte, NC | 4,205 | 34 | 32.0% |
| Perth South, ON | 4,205 | n/a | |
| Port Aransas, TX | 4,203 | 42 | 16.0% |
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