Weather history and climate summary information is available for the following locations:
- Atlantic City
- Newark
- Wrightstown
Warmest January Days
The warmest January days in New Jersey are:
| Wrightstown, New Jersey | 1950 | 73.9°F |
| Atlantic City, New Jersey | 1950 | 73.4°F |
| Newark, New Jersey | 2007 | 72.3°F |
| Wrightstown, New Jersey | 2007 | 72.1°F |
| Atlantic City, New Jersey | 2007 | 72°F |
Coldest January Days
The coldest January days in New Jersey were:
| Atlantic City, New Jersey | 1977 | -10.1°F |
| Atlantic City, New Jersey | 1985 | -9.2°F |
| Newark, New Jersey | 1985 | -8.1°F |
| Atlantic City, New Jersey | 1987 | -8.1°F |
| Wrightstown, New Jersey | 1984 | -7.8°F |
Wettest January Days
The wettest single days in January occurred:
| Newark, New Jersey | 1976 | 4 inches |
| Atlantic City, New Jersey | 1973 | 3.5 inches |
| Wrightstown, New Jersey | 1979 | 3 inches |
| Atlantic City, New Jersey | 1994 | 3 inches |
| Wrightstown, New Jersey | 1999 | 2.7 inches |