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| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 46°F | 64°F | 54°F | 4.5" |
| February | 48°F | 67°F | 56°F | 3.0" |
| March | 55°F | 73°F | 63°F | 12.7" |
| April | 61°F | 79°F | 69°F | 7.3" |
| May | 67°F | 84°F | 75°F | 4.3" |
| June | 73°F | 89°F | 80°F | 5.2" |
| July | 75°F | 90°F | 81°F | 4.4" |
| August | 75°F | 90°F | 81°F | 4.9" |
| September | 71°F | 87°F | 78°F | 6.4" |
| October | 60°F | 80°F | 69°F | 3.9" |
| November | 51°F | 72°F | 60°F | 3.1" |
| December | 49°F | 67°F | 56°F | 3.7" |
| Index | Pierre Part | Louisiana | National |
| Air quality index | 45 | 106 | 42 |
| Pollution index | 1,868,490 | 2,526,475 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 224 |
| Days with moderate air quality | 132 |
| Days w/ poor A.Q. for sensitive groups | 9 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.002% |
| Benzene | 0.020% |
| Carbon Tetrachloride | 0.002% |
| Lead | 0.020% |
| Mercury | 0.002% |
| City | Population | Air Quality Index | National Avg. |
| Supreme, LA | 494 | 41 | 18.0% |
| Labadieville, LA | 1,302 | 41 | 18.0% |
| Napoleonville, LA | 620 | 41 | 18.0% |
| Donaldsonville, LA | 8,424 | 45 | 10.0% |
| White Castle, LA | 2,260 | 45 | 10.0% |
| Pierre Part, LA | 1,815 | 45 | 10.0% |
| City | Population | Air Quality Index | National Avg. |
| Jenkins, KY | 1,815 | 45 | 10.0% |
| Garrett, WA | 1,815 | 23 | 54.0% |
| Valleyview, AB | 1,815 | n/a | |
| Mount Cobb, PA | 1,816 | 38 | 24.0% |
| Calhoun Falls, SC | 1,814 | 31 | 38.0% |
| Pierre Part, LA | 1,815 | 45 | 10.0% |
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