Weather history and climate summary information is available for the following locations:
- Alexandria
- Lafayette
- Lake Charles
- Monroe
- New Orleans
- Shreveport
Warmest December Days
The warmest December days in Louisiana are:
| Shreveport, Louisiana | 1955 | 85.3°F |
| New Orleans, Louisiana | 1984 | 84.7°F |
| New Orleans, Louisiana | 1981 | 84°F |
| New Orleans, Louisiana | 1978 | 84°F |
| Shreveport, Louisiana | 2005 | 84°F |
Coldest December Days
The coldest December days in Louisiana were:
| Shreveport, Louisiana | 1989 | 5°F |
| Monroe, Louisiana | 1983 | 5.2°F |
| Shreveport, Louisiana | 1983 | 5.2°F |
| Shreveport, Louisiana | 1983 | 6.1°F |
| Shreveport, Louisiana | 1989 | 6.3°F |
Wettest December Days
The wettest single days in December occurred:
| Lafayette, Louisiana | 1995 | 8.2 inches |
| New Orleans, Louisiana | 2009 | 7.2 inches |
| New Orleans, Louisiana | 1990 | 6.8 inches |
| Lake Charles, Louisiana | 2002 | 6.2 inches |
| New Orleans, Louisiana | 1982 | 5.7 inches |