| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 44°F | 65°F | 53°F | 5.2" |
| February | 45°F | 66°F | 54°F | 5.0" |
| March | 51°F | 74°F | 62°F | 3.1" |
| April | 58°F | 80°F | 68°F | 3.2" |
| May | 66°F | 86°F | 75°F | 5.7" |
| June | 72°F | 92°F | 81°F | 3.0" |
| July | 74°F | 92°F | 82°F | 5.2" |
| August | 74°F | 93°F | 82°F | 7.9" |
| September | 70°F | 89°F | 78°F | 6.9" |
| October | 58°F | 81°F | 69°F | 5.6" |
| November | 49°F | 73°F | 59°F | 2.7" |
| December | 45°F | 66°F | 54°F | 9.3" |
| Index | Montpelier | Louisiana | National |
| Air quality index | 30 | 106 | 42 |
| Pollution index | 498,493 | 2,526,475 | 2,726,193 |
| Measurement | Total |
| Days measured | 117 |
| Days with good air quality | 104 |
| Days with moderate air quality | 13 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.004% |
| Benzene | 0.010% |
| Carbon Tetrachloride | 0.010% |
| Lead | 0.004% |
| Mercury | 0.002% |
| City | Population | Air Quality Index | National Avg. |
| Hammond, LA | 20,557 | 30 | 40.0% |
| Roseland, LA | 1,186 | 30 | 40.0% |
| Albany, LA | 1,300 | 30 | 40.0% |
| Independence, LA | 2,578 | 30 | 40.0% |
| Tangipahoa, LA | 641 | 30 | 40.0% |
| Montpelier, LA | 323 | 30 | 40.0% |
| City | Population | Air Quality Index | National Avg. |
| Manalapan, FL | 323 | 36 | 28.0% |
| Barnum, IA | 323 | 37 | 26.0% |
| Medora, IL | 323 | 54 | 8.0% |
| Stinesville, IN | 323 | 42 | 16.0% |
| East New Market, MD | 323 | 41 | 18.0% |
| Montpelier, LA | 323 | 30 | 40.0% |
Here are the best places to live in Louisiana
Safest States In The US
See the best places to live in Montpelier
Check out the 10 most dangerous cities in Louisiana