| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 37°F | 64°F | 49°F | 9.9" |
| February | 41°F | 67°F | 52°F | 9.4" |
| March | 46°F | 73°F | 58°F | 7.9" |
| April | 57°F | 81°F | 68°F | 10.9" |
| May | 61°F | 86°F | 73°F | 17.6" |
| June | 72°F | 91°F | 80°F | 13.7" |
| July | 72°F | 91°F | 80°F | 9.7" |
| August | 73°F | 92°F | 81°F | 10.1" |
| September | 68°F | 90°F | 77°F | 6.6" |
| October | 56°F | 83°F | 68°F | 5.3" |
| November | 42°F | 70°F | 54°F | 9.7" |
| December | 44°F | 68°F | 54°F | 12.0" |
| Index | Folsom | Louisiana | National |
| Air quality index | 30 | 106 | 42 |
| Pollution index | 4,700,710 | 2,526,475 | 2,726,193 |
| Measurement | Total |
| Days measured | 117 |
| Days with good air quality | 104 |
| Days with moderate air quality | 13 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.003% |
| Benzene | 0.060% |
| Carbon Tetrachloride | 0.010% |
| Lead | 0.030% |
| Mercury | 0.001% |
| City | Population | Air Quality Index | National Avg. |
| Franklinton, LA | 3,709 | 30 | 40.0% |
| Abita Springs, LA | 2,571 | 30 | 40.0% |
| Ponchatoula, LA | 7,311 | 30 | 40.0% |
| Covington, LA | 10,471 | 30 | 40.0% |
| Folsom, LA | 841 | 30 | 40.0% |
| City | Population | Air Quality Index | National Avg. |
| Pine Hill, AL | 841 | 36 | 28.0% |
| Cleone, CA | 841 | 33 | 34.0% |
| Morehouse, MO | 841 | 26 | 48.0% |
| High Shoals, NC | 841 | 36 | 28.0% |
| Winton, NC | 841 | 36 | 28.0% |
| Folsom, LA | 841 | 30 | 40.0% |
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