| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 41°F | 64°F | 51°F | 4.4" |
| February | 43°F | 66°F | 54°F | 4.5" |
| March | 50°F | 73°F | 61°F | 4.1" |
| April | 56°F | 78°F | 67°F | 5.7" |
| May | 62°F | 84°F | 73°F | 5.4" |
| June | 70°F | 90°F | 79°F | 6.2" |
| July | 72°F | 91°F | 80°F | 6.6" |
| August | 73°F | 91°F | 80°F | 8.9" |
| September | 68°F | 88°F | 77°F | 5.8" |
| October | 56°F | 81°F | 67°F | 3.7" |
| November | 46°F | 72°F | 58°F | 2.7" |
| December | 44°F | 66°F | 54°F | 5.9" |
| Index | Grand Bay | Alabama | National |
| Air quality index | 32 | 37 | 50 |
| Pollution index | 630,582 | 4,051,223 | 5,066,862 |
| Measurement | Total |
| Days measured | 363 |
| Days with good air quality | 330 |
| Days with moderate air quality | 33 |
| Days w/ poor A.Q. for sensitive groups | |
| Days with unhealthy air quality |
| Pollutant | Total |
| Arsenic | 0.001% |
| Benzene | 0.010% |
| Carbon Tetrachloride | 0.001% |
| Lead | 0.002% |
| Mercury | 0.000% |
| City, State | Population | Air Quality Index | National Avg. |
| Hurley, MS | 1,020 | 32 | 36% |
| Bayou La Batre, AL | 2,532 | 32 | 36% |
| Big Point, MS | 690 | 32 | 36% |
| Wade, MS | 1,063 | 32 | 36% |
| Escatawpa, MS | 3,582 | 32 | 36% |
| Grand Bay, AL | 3,841 | 32 | 36% |
| City, State | Population | Air Quality Index | National Avg. |
| Lambertville, NJ | 3,841 | 41 | 18% |
| Pixley, CA | 3,840 | 66 | 32% |
| Marianna, AR | 3,840 | 45 | 10% |
| Fairview CDP, NJ | 3,842 | 51 | 2% |
| Bagdad, FL | 3,843 | 41 | 18% |
| Grand Bay, AL | 3,841 | 32 | 36% |
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