| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 42°F | 64°F | 52°F | 10.7" |
| February | 46°F | 69°F | 56°F | 9.6" |
| March | 52°F | 74°F | 62°F | 9.5" |
| April | 59°F | 80°F | 69°F | 12.2" |
| May | 63°F | 84°F | 73°F | 18.2" |
| June | 72°F | 89°F | 80°F | 8.0" |
| July | 73°F | 91°F | 81°F | 7.0" |
| August | 73°F | 91°F | 80°F | 13.6" |
| September | 70°F | 89°F | 78°F | 8.0" |
| October | 59°F | 82°F | 69°F | 9.8" |
| November | 49°F | 73°F | 60°F | 6.0" |
| December | 47°F | 68°F | 56°F | 6.6" |
| Index | Gonzales | Louisiana | National |
| Air quality index | 45 | 106 | 42 |
| Pollution index | 1,932,420 | 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 | 0.000% |
| Benzene | 0.030% |
| Carbon Tetrachloride | 0.060% |
| Lead | 0.000% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Convent, LA | 415 | 41 | 18.0% |
| Hester, LA | 598 | 41 | 18.0% |
| Lutcher, LA | 3,229 | 41 | 18.0% |
| Gramercy, LA | 3,249 | 41 | 18.0% |
| North Vacherie, LA | 1,641 | 41 | 18.0% |
| Gonzales, LA | 10,932 | 45 | 10.0% |
| City | Population | Air Quality Index | National Avg. |
| Brock Hall, MD | 10,926 | 47 | 6.0% |
| Lawrenceburg, TN | 10,925 | 27 | 46.0% |
| Hawaiian Paradise Park, HI | 10,921 | 16 | 68.0% |
| Suffern, NY | 10,945 | 51 | 2.0% |
| Oneida, NY | 10,918 | 27 | 46.0% |
| Gonzales, LA | 10,932 | 45 | 10.0% |
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