| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 46°F | 65°F | 54°F | 11.3" |
| February | 48°F | 67°F | 57°F | 5.8" |
| March | 54°F | 74°F | 64°F | 7.3" |
| April | 60°F | 79°F | 70°F | 11.7" |
| May | 66°F | 85°F | 75°F | 17.5" |
| June | 72°F | 90°F | 81°F | 8.4" |
| July | 74°F | 91°F | 81°F | 8.4" |
| August | 74°F | 90°F | 81°F | 12.8" |
| September | 71°F | 88°F | 79°F | 10.6" |
| October | 61°F | 81°F | 71°F | 10.7" |
| November | 52°F | 73°F | 61°F | 11.5" |
| December | 49°F | 67°F | 57°F | 9.8" |
| Index | Galliano | Louisiana | National |
| Air quality index | 41 | 106 | 42 |
| Pollution index | 3,618,980 | 2,526,475 | 2,726,193 |
| Measurement | Total |
| Days measured | 361 |
| Days with good air quality | 272 |
| Days with moderate air quality | 87 |
| Days w/ poor A.Q. for sensitive groups | 2 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.020% |
| Benzene | 0.040% |
| Carbon Tetrachloride | 0.010% |
| Lead | 0.020% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Lockport Heights, LA | 1,706 | 41 | 18.0% |
| Cut Off, LA | 5,362 | 41 | 18.0% |
| Montegut, LA | 1,809 | 41 | 18.0% |
| Larose, LA | 6,463 | 41 | 18.0% |
| Golden Meadow, LA | 1,918 | 41 | 18.0% |
| Galliano, LA | 7,514 | 41 | 18.0% |
| City | Population | Air Quality Index | National Avg. |
| Strathmore, NJ | 7,514 | 51 | 2.0% |
| Port Jefferson Station, NY | 7,516 | 43 | 14.0% |
| Central Huron, ON | 7,511 | n/a | |
| Auburn, GA | 7,519 | 37 | 26.0% |
| Meridianville, AL | 7,520 | 44 | 12.0% |
| Galliano, LA | 7,514 | 41 | 18.0% |
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