| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 45°F | 65°F | 55°F | 4.1" |
| February | 46°F | 67°F | 56°F | 5.5" |
| March | 52°F | 72°F | 62°F | 4.3" |
| April | 59°F | 78°F | 69°F | 3.9" |
| May | 65°F | 84°F | 75°F | 2.1" |
| June | 73°F | 89°F | 81°F | 6.3" |
| July | 75°F | 90°F | 82°F | 6.4" |
| August | 75°F | 90°F | 82°F | 7.2" |
| September | 71°F | 88°F | 79°F | 6.1" |
| October | 61°F | 82°F | 71°F | 2.9" |
| November | 51°F | 73°F | 61°F | 4.5" |
| December | 48°F | 68°F | 58°F | 4.2" |
| Index | Port St. Joe | Florida | National |
| Air quality index | 38 | 35 | 42 |
| Pollution index | 1,006,860 | 7,570,785 | 2,726,193 |
| Measurement | Total |
| Days measured | 357 |
| Days with good air quality | 308 |
| Days with moderate air quality | 49 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.002% |
| Benzene | 0.010% |
| Carbon Tetrachloride | 0.001% |
| Lead | 0.000% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Mexico Beach, FL | 1,370 | 38 | 24.0% |
| Port St. Joe, FL | 3,502 | 38 | 24.0% |
| City | Population | Air Quality Index | National Avg. |
| Pelham, GA | 3,502 | 40 | 20.0% |
| Broken Bow, NE | 3,503 | 19 | 62.0% |
| Yuma, CO | 3,500 | 45 | 10.0% |
| Park City, TN | 3,500 | 44 | 12.0% |
| Red Bud, IL | 3,504 | 54 | 8.0% |
| Port St. Joe, FL | 3,502 | 38 | 24.0% |
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