| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 44°F | 64°F | 53°F | 5.6" |
| February | 47°F | 67°F | 56°F | 4.5" |
| March | 54°F | 74°F | 63°F | 3.3" |
| April | 60°F | 81°F | 70°F | 4.9" |
| May | 67°F | 86°F | 76°F | 5.8" |
| June | 73°F | 91°F | 81°F | 5.8" |
| July | 75°F | 92°F | 82°F | 5.9" |
| August | 75°F | 93°F | 82°F | 7.6" |
| September | 71°F | 89°F | 79°F | 5.5" |
| October | 60°F | 82°F | 70°F | 3.6" |
| November | 51°F | 73°F | 61°F | 4.1" |
| December | 46°F | 66°F | 55°F | 5.9" |
| Index | Egan | Louisiana | National |
| Air quality index | 41 | 106 | 42 |
| Pollution index | 1,171,580 | 2,526,475 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 280 |
| Days with moderate air quality | 85 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.000% |
| Benzene | 0.020% |
| Carbon Tetrachloride | 0.002% |
| Lead | 0.004% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Rayne, LA | 8,062 | 41 | 18.0% |
| Crowley, LA | 12,689 | 41 | 18.0% |
| Estherwood, LA | 676 | 41 | 18.0% |
| Mermentau, LA | 616 | 41 | 18.0% |
| Branch, LA | 355 | 41 | 18.0% |
| Egan, LA | 1,002 | 41 | 18.0% |
| City | Population | Air Quality Index | National Avg. |
| Greenville, GA | 1,002 | 42 | 16.0% |
| Seaman, OH | 1,002 | 14 | 72.0% |
| Kaslo, BC | 1,002 | n/a | |
| Geraldine, AL | 1,003 | 39 | 22.0% |
| Palo, IA | 1,003 | 39 | 22.0% |
| Egan, LA | 1,002 | 41 | 18.0% |
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