Average Temperatures for New Jersey in January
Average temperatures for January at cities, communities and other locations in New Jersey are listed below in degrees Fahrenheit and Celsius.
You can jump to a separate table for: North Jersey and South Jersey.
The tables give the normals for maximum and minimum temperatures based on weather data collected from 1991 to 2020 by the US National Centers for Environmental Information.
North Jersey
| High °F | Low °F | Place | High °C | Low °C |
|---|---|---|---|---|
| 38 | 22 | Easton | 3 | -6 |
| 41 | 21 | Hightstown | 5 | -6 |
| 42 | 19 | Lambertville | 5 | -7 |
| 42 | 25 | Long Branch | 5 | -4 |
| 40 | 23 | New Brunswick | 5 | -5 |
| 40 | 26 | Newark | 4 | -4 |
| 41 | 24 | Plainfield | 5 | -5 |
| 39 | 19 | Somerville | 4 | -7 |
| 40 | 24 | Trenton | 4 | -4 |
| 38 | 20 | Wanaque Reservoir Dam | 3 | -7 |
South Jersey
| High °F | Low °F | Place | High °C | Low °C |
|---|---|---|---|---|
| 42 | 30 | Atlantic City Marina | 5 | -1 |
| 41 | 27 | Beach Haven, Brant Beach | 5 | -3 |
| 46 | 25 | Belleplain State Forest | 8 | -4 |
| 41 | 25 | Bridgeton | 5 | -4 |
| 43 | 29 | Cape May | 6 | -2 |
| 41 | 25 | Glassboro | 5 | -4 |
| 42 | 24 | Hammonton | 5 | -5 |
| 42 | 24 | Millville | 6 | -5 |
| 43 | 26 | Moorestown | 6 | -3 |
| 42 | 22 | Toms River | 5 | -6 |
Reference
NOAA National Centers for Environmental Information (NCEI). Climate Normals.