December weather in Danbury, CT
The average temperature in Danbury in December is 32.4°F (23.9°F–40.8°F). Average precipitation: 4.24 inches.
December is a winter month in Danbury, and is cooler than the annual average of 49.6°F. Daily temperatures swing about 16.9°F between overnight low and afternoon high. Expect about 12 days with precipitation. Daylight averages about 9h 1m. For travel, December is cold.
Avg High
40.8°F
Avg Low
23.9°F
Precipitation
4.24 in
Daylight
9h 1m
December records in Danbury
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| December 1 | 66.9°F (2001) | 18.0°F (2002) | 2.81 in (2010) |
| December 2 | 64.0°F (1998) | 17.2°F (2007) | 0.67 in (2025) |
| December 3 | 64.0°F (2009) | 12.0°F (2002) | 1.02 in (2009) |
| December 4 | 70.0°F (1998) | 10.0°F (2002) | 0.21 in (2020) |
| December 5 | 64.0°F (2001) | 10.0°F (2025) | 0.92 in (2020) |
| December 6 | 68.0°F (2001) | 7.0°F (2002) | 0.88 in (2014) |
| December 7 | 73.9°F (1998) | 1.9°F (2002) | 2.08 in (2011) |
| December 8 | 57.0°F (2004) | 12.2°F (2019) | 0.34 in (2011) |
| December 9 | 55.0°F (2008) | 5.0°F (2002) | 2.33 in (2014) |
| December 10 | 62.1°F (2023) | 5.0°F (2002) | 1.04 in (2023) |
| December 11 | 66.0°F (2020) | 0.0°F (2025) | 1.82 in (2003) |
| December 12 | 63.0°F (2015) | 11.1°F (2013) | 2.06 in (2010) |
| December 13 | 63.0°F (2015) | 10.0°F (2005) | 0.84 in (2007) |
| December 14 | 63.0°F (2015) | -4.0°F (2005) | 1.10 in (2019) |
| December 15 | 64.9°F (2015) | -4.0°F (2005) | 0.29 in (2022) |
| December 16 | 64.0°F (2021) | 7.2°F (2013) | 1.26 in (2005) |
| December 17 | 64.0°F (2000) | 3.2°F (2013) | 2.05 in (2000) |
| December 18 | 63.0°F (2023) | 7.2°F (2007) | 3.56 in (2023) |
| December 19 | 60.1°F (2025) | 1.2°F (2020) | 1.59 in (2025) |
| December 20 | 57.9°F (1999) | 5.0°F (2004) | 1.11 in (1999) |
| December 21 | 62.1°F (2018) | 3.0°F (2004) | 3.10 in (2018) |
| December 22 | 68.0°F (2013) | 5.2°F (2024) | 0.28 in (2006) |
| December 23 | 61.0°F (2013) | -2.7°F (2008) | 1.63 in (2004) |
| December 24 | 69.1°F (2015) | 6.3°F (2022) | 1.64 in (2003) |
| December 25 | 64.0°F (2015) | 7.0°F (1998) | 1.68 in (2020) |
| December 26 | 54.0°F (2015) | 8.2°F (2017) | 0.99 in (2009) |
| December 27 | 57.9°F (2011) | 6.1°F (2004) | 1.45 in (2011) |
| December 28 | 62.1°F (2008) | 1.0°F (2004) | 1.59 in (2023) |
| December 29 | 57.9°F (2024) | 3.2°F (2017) | 1.03 in (2013) |
| December 30 | 64.0°F (2022) | 3.2°F (2017) | 0.58 in (2019) |
| December 31 | 55.0°F (2022) | 2.1°F (2017) | 0.81 in (2018) |