December weather in Harrison, NJ
The average temperature in Harrison in December is 37.3°F (30.5°F–44.0°F). Average precipitation: 4.58 inches. Average snowfall is 5.9 inches.
December is a winter month in Harrison, and is cooler than the annual average of 54.8°F. Daily temperatures swing about 13.5°F between overnight low and afternoon high. Expect about 11 days with precipitation. Daylight averages about 9h 5m. For travel, December is cold.
Avg High
44.0°F
Avg Low
30.5°F
Precipitation
4.58 in
Snow
5.9 in
December records in Harrison
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| December 1 | 72.0°F (2001) | 24.1°F (1999) | 1.54 in (2010) |
| December 2 | 66.0°F (2014) | 19.0°F (2007) | 2.20 in (1996) |
| December 3 | 69.1°F (1998) | 19.0°F (2002) | 0.91 in (2025) |
| December 4 | 73.9°F (1998) | 19.9°F (2002) | 0.67 in (2022) |
| December 5 | 71.1°F (2001) | 18.0°F (2025) | 0.89 in (2020) |
| December 6 | 73.9°F (2001) | 19.0°F (2025) | 0.92 in (1999) |
| December 7 | 77.0°F (1998) | 21.0°F (2003) | 1.74 in (2011) |
| December 8 | 59.0°F (2004) | 18.0°F (2006) | 0.60 in (2001) |
| December 9 | 57.9°F (2008) | 16.0°F (2025) | 1.91 in (2009) |
| December 10 | 64.9°F (2008) | 16.0°F (2025) | 1.28 in (2019) |
| December 11 | 61.0°F (2023) | 21.0°F (2009) | 1.82 in (2008) |
| December 12 | 66.9°F (2021) | 21.9°F (2013) | 1.39 in (2010) |
| December 13 | 64.9°F (2015) | 16.0°F (2005) | 1.02 in (2007) |
| December 14 | 66.9°F (2015) | 12.0°F (2005) | 1.59 in (2003) |
| December 15 | 66.0°F (2008) | 15.1°F (2005) | 0.85 in (2013) |
| December 16 | 60.1°F (2015) | 15.1°F (2016) | 1.02 in (2005) |
| December 17 | 64.0°F (2000) | 15.1°F (2016) | 1.28 in (2018) |
| December 18 | 61.0°F (2023) | 16.0°F (2009) | 3.20 in (2023) |
| December 19 | 61.0°F (2023) | 14.0°F (2019) | 0.88 in (2008) |
| December 20 | 61.0°F (2002) | 8.1°F (2004) | 0.86 in (1999) |
| December 21 | 62.1°F (2011) | 9.0°F (2004) | 1.68 in (2018) |
| December 22 | 68.0°F (2013) | 10.9°F (2008) | 0.48 in (2006) |
| December 23 | 71.1°F (2013) | 9.0°F (2024) | 1.86 in (2022) |
| December 24 | 66.0°F (2015) | 5.0°F (2022) | 1.89 in (2015) |
| December 25 | 71.1°F (2015) | 5.0°F (2022) | 1.21 in (2020) |
| December 26 | 64.0°F (2015) | 14.0°F (2000) | 1.40 in (2009) |
| December 27 | 57.0°F (2011) | 17.1°F (2022) | 1.70 in (2012) |
| December 28 | 64.9°F (2008) | 10.9°F (2017) | 1.97 in (2023) |
| December 29 | 60.1°F (2018) | 10.9°F (2017) | 1.40 in (1997) |
| December 30 | 63.0°F (2024) | 12.0°F (2017) | 1.41 in (2013) |
| December 31 | 61.0°F (2022) | 14.0°F (2017) | 0.33 in (2019) |