December weather in Trenton, NJ
The average temperature in Trenton in December is 36.8°F (29.3°F–44.4°F). Average precipitation: 4.04 inches. Average snowfall is 4.6 inches.
December is a winter month in Trenton, and is cooler than the annual average of 54.1°F. Daily temperatures swing about 15.1°F between overnight low and afternoon high. Expect about 11 days with precipitation. Daylight averages about 9h 9m. For travel, December is cold.
Avg High
44.4°F
Avg Low
29.3°F
Precipitation
4.04 in
Snow
4.6 in
December records in Trenton
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| December 1 | 71.1°F (2006) | 19.9°F (1999) | 1.56 in (2010) |
| December 2 | 63.0°F (1998) | 19.2°F (2024) | 0.79 in (2025) |
| December 3 | 69.1°F (1998) | 12.9°F (2000) | 0.81 in (2023) |
| December 4 | 73.0°F (1998) | 12.0°F (2002) | 0.39 in (2005) |
| December 5 | 73.9°F (2001) | 19.9°F (2025) | 0.67 in (2020) |
| December 6 | 72.0°F (2001) | 15.1°F (2002) | 0.92 in (2014) |
| December 7 | 75.9°F (1998) | 9.0°F (2002) | 2.06 in (2011) |
| December 8 | 57.9°F (2004) | 16.0°F (2005) | 0.67 in (2001) |
| December 9 | 57.9°F (2008) | 10.9°F (2025) | 1.98 in (2009) |
| December 10 | 64.0°F (2008) | 10.9°F (2002) | 1.34 in (2023) |
| December 11 | 66.0°F (2021) | 16.0°F (2005) | 2.05 in (2008) |
| December 12 | 68.0°F (2015) | 17.2°F (2013) | 1.06 in (2010) |
| December 13 | 70.0°F (2015) | 12.0°F (2005) | 0.86 in (2009) |
| December 14 | 68.0°F (2015) | 8.1°F (2005) | 1.15 in (2003) |
| December 15 | 66.9°F (2015) | 10.9°F (2005) | 1.19 in (2022) |
| December 16 | 61.0°F (2021) | 14.0°F (2025) | 1.04 in (2007) |
| December 17 | 66.0°F (2000) | 16.0°F (2025) | 1.05 in (2015) |
| December 18 | 66.0°F (2006) | 14.0°F (2002) | 2.17 in (2023) |
| December 19 | 57.9°F (2017) | 13.1°F (2020) | 1.26 in (2025) |
| December 20 | 61.0°F (2002) | 8.1°F (2004) | 0.58 in (1999) |
| December 21 | 64.0°F (2013) | 10.9°F (2004) | 1.10 in (2012) |
| December 22 | 68.0°F (2013) | 9.1°F (2024) | 0.75 in (2006) |
| December 23 | 69.1°F (2015) | 5.2°F (2024) | 1.20 in (2015) |
| December 24 | 72.0°F (2015) | 5.2°F (2022) | 1.95 in (2003) |
| December 25 | 66.0°F (2015) | 12.2°F (2022) | 1.05 in (2002) |
| December 26 | 60.1°F (2015) | 9.0°F (1998) | 1.40 in (2009) |
| December 27 | 63.0°F (2015) | 12.0°F (1998) | 0.78 in (2023) |
| December 28 | 66.0°F (2008) | 9.0°F (2004) | 1.23 in (2018) |
| December 29 | 64.9°F (2024) | 10.0°F (2000) | 1.16 in (2013) |
| December 30 | 57.9°F (2022) | 14.2°F (2017) | 0.60 in (2000) |
| December 31 | 57.9°F (2011) | 8.2°F (2017) | 0.85 in (2018) |