| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 48°F | 62°F | 54°F | 4.0" |
| February | 49°F | 65°F | 56°F | 7.4" |
| March | 54°F | 70°F | 61°F | 5.9" |
| April | 62°F | 76°F | 69°F | 1.9" |
| May | 70°F | 83°F | 76°F | 4.6" |
| June | 76°F | 88°F | 82°F | 3.1" |
| July | 78°F | 89°F | 83°F | 7.7" |
| August | 78°F | 89°F | 83°F | 8.5" |
| September | 76°F | 86°F | 81°F | 3.5" |
| October | 67°F | 80°F | 73°F | 6.6" |
| November | 56°F | 70°F | 63°F | 3.0" |
| December | 52°F | 67°F | 59°F | 5.6" |
| Index | Triumph | Louisiana | National |
| Air quality index | 45 | 106 | 42 |
| Pollution index | 3,881,730 | 2,526,475 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 229 |
| Days with moderate air quality | 134 |
| Days w/ poor A.Q. for sensitive groups | 2 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.000% |
| Benzene | 0.040% |
| Carbon Tetrachloride | 0.002% |
| Lead | 0.010% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Port Sulphur, LA | 2,174 | 45 | 10.0% |
| Boothville, LA | 605 | 45 | 10.0% |
| Venice, LA | 280 | 45 | 10.0% |
| Buras, LA | 896 | 45 | 10.0% |
| Empire, LA | 1,124 | 45 | 10.0% |
| Triumph, LA | 320 | 45 | 10.0% |
| City | Population | Air Quality Index | National Avg. |
| Sand City, CA | 320 | 37 | 26.0% |
| Limestone, FL | 320 | 36 | 28.0% |
| Epworth, GA | 320 | 1 | 98.0% |
| Silver City, IA | 320 | 40 | 20.0% |
| Ewing, IL | 320 | 43 | 14.0% |
| Triumph, LA | 320 | 45 | 10.0% |
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