| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 39°F | 61°F | 48°F | 9.4" |
| February | 41°F | 64°F | 51°F | 7.9" |
| March | 49°F | 73°F | 60°F | 13.5" |
| April | 56°F | 80°F | 67°F | 7.9" |
| May | 63°F | 86°F | 73°F | 10.8" |
| June | 71°F | 93°F | 81°F | 7.9" |
| July | 72°F | 94°F | 82°F | 3.8" |
| August | 73°F | 96°F | 82°F | 6.9" |
| September | 67°F | 91°F | 77°F | 6.3" |
| October | 55°F | 82°F | 66°F | 8.0" |
| November | 46°F | 71°F | 57°F | 6.3" |
| December | 41°F | 62°F | 50°F | 7.5" |
| Index | Campti | Louisiana | National |
| Air quality index | 39 | 106 | 42 |
| Pollution index | 2,517,590 | 2,526,475 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 291 |
| Days with moderate air quality | 74 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.002% |
| Benzene | 0.030% |
| Carbon Tetrachloride | 0.070% |
| Lead | 0.010% |
| Mercury | 0.001% |
| City | Population | Air Quality Index | National Avg. |
| Clarence, LA | 329 | 30 | 40.0% |
| St. Maurice, LA | 368 | 30 | 40.0% |
| Robeline, LA | 126 | 30 | 40.0% |
| Natchitoches, LA | 17,711 | 30 | 40.0% |
| Vienna Bend, LA | 1,285 | 30 | 40.0% |
| Campti, LA | 1,217 | 39 | 22.0% |
| City | Population | Air Quality Index | National Avg. |
| Bryn Athyn, PA | 1,217 | 51 | 2.0% |
| Leupp, AZ | 1,216 | 45 | 10.0% |
| Blue Hill, ME | 1,216 | 31 | 38.0% |
| Pender, NE | 1,216 | 35 | 30.0% |
| White Hall, WV | 1,216 | 31 | 38.0% |
| Campti, LA | 1,217 | 39 | 22.0% |
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