| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 47°F | 63°F | 54°F | 5.2" |
| February | 50°F | 66°F | 57°F | 5.6" |
| March | 57°F | 73°F | 64°F | 5.4" |
| April | 64°F | 79°F | 71°F | 7.6" |
| May | 71°F | 85°F | 77°F | 5.1" |
| June | 77°F | 90°F | 83°F | 6.2" |
| July | 79°F | 91°F | 84°F | 6.7" |
| August | 79°F | 91°F | 85°F | 8.7" |
| September | 76°F | 88°F | 82°F | 5.8" |
| October | 67°F | 80°F | 73°F | 3.6" |
| November | 57°F | 71°F | 63°F | 2.1" |
| December | 51°F | 65°F | 57°F | 6.2" |
| Index | Arabi | Louisiana | National |
| Air quality index | 45 | 106 | 50 |
| Pollution index | 2,751,420 | 2,540,283 | 5,066,862 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 224 |
| Days with moderate air quality | 116 |
| Days w/ poor A.Q. for sensitive groups | 22 |
| Days with unhealthy air quality | 3 |
| Pollutant | Total |
| Arsenic | 0.002% |
| Benzene | 0.030% |
| Carbon Tetrachloride | 0.002% |
| Lead | 0.001% |
| Mercury | 0.000% |
| City, State | Population | Air Quality Index | National Avg. |
| Belle Chasse, LA | 13,709 | 45 | 10% |
| Estelle, LA | 15,856 | 45 | 10% |
| Jean Lafitte, LA | 1,888 | 45 | 10% |
| Meraux, LA | 6,787 | 45 | 10% |
| Poydras, LA | 2,394 | 45 | 10% |
| Arabi, LA | 4,542 | 45 | 10% |
| City, State | Population | Air Quality Index | National Avg. |
| Windom, MN | 4,545 | 35 | 30% |
| Cherry Grove, OH | 4,539 | 54 | 8% |
| Hamilton, MT | 4,539 | 55 | 10% |
| Madisonville, TX | 4,546 | 40 | 20% |
| Berlin, MD | 4,538 | 36 | 28% |
| Arabi, LA | 4,542 | 45 | 10% |