| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 47°F | 65°F | 55°F | 3.7" |
| February | 49°F | 68°F | 57°F | 2.9" |
| March | 56°F | 74°F | 64°F | 3.6" |
| April | 62°F | 79°F | 70°F | 5.6" |
| May | 70°F | 87°F | 77°F | 4.0" |
| June | 75°F | 92°F | 83°F | 6.0" |
| July | 76°F | 92°F | 83°F | 9.1" |
| August | 77°F | 93°F | 84°F | 5.1" |
| September | 73°F | 89°F | 80°F | 6.1" |
| October | 64°F | 83°F | 72°F | 10.0" |
| November | 55°F | 75°F | 64°F | 3.7" |
| December | 47°F | 66°F | 56°F | 4.0" |
| Index | Baytown | Texas | National |
| Air quality index | 52 | 52 | 42 |
| Pollution index | 701,652 | 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 | 0.000% |
| Benzene | 0.010% |
| Carbon Tetrachloride | 0.001% |
| Lead | 0.003% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Cove, TX | 465 | 52 | 4.0% |
| Crosby, TX | 2,276 | 52 | 4.0% |
| Clear Lake Shores, TX | 1,371 | 52 | 4.0% |
| Highlands, TX | 7,345 | 52 | 4.0% |
| Pasadena, TX | 152,537 | 52 | 4.0% |
| Baytown, TX | 76,089 | 52 | 4.0% |
| City | Population | Air Quality Index | National Avg. |
| Kalamazoo, MI | 76,106 | 38 | 24.0% |
| Hammond, IN | 76,141 | 55 | 10.0% |
| Wyoming, MI | 75,999 | 38 | 24.0% |
| Iowa City, IA | 75,849 | 35 | 30.0% |
| Bellflower, CA | 76,339 | 72 | 44.0% |
| Baytown, TX | 76,089 | 52 | 4.0% |
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