December weather in Middletown, CT
The average temperature in Middletown in December is 33.1°F (24.5°F–41.7°F). Average precipitation: 4.12 inches.
December is a winter month in Middletown, and is cooler than the annual average of 50.7°F. Daily temperatures swing about 17.2°F between overnight low and afternoon high. Expect about 11 days with precipitation. Daylight averages about 9h 0m. For travel, December is cold.
Avg High
41.7°F
Avg Low
24.5°F
Precipitation
4.12 in
Daylight
9h 0m
December records in Middletown
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| December 1 | 71.1°F (2001) | 20.1°F (2019) | 1.54 in (2010) |
| December 2 | 57.9°F (2023) | 16.2°F (2024) | 1.14 in (2025) |
| December 3 | 66.0°F (2009) | 12.0°F (2003) | 1.39 in (2009) |
| December 4 | 62.1°F (2001) | 7.0°F (2002) | 0.18 in (2024) |
| December 5 | 66.9°F (2001) | 10.0°F (2025) | 1.96 in (2020) |
| December 6 | 72.0°F (2001) | 7.0°F (2002) | 0.86 in (2014) |
| December 7 | 60.1°F (2001) | 1.0°F (2002) | 1.68 in (2011) |
| December 8 | 59.0°F (2004) | 12.0°F (2002) | 0.46 in (2011) |
| December 9 | 55.9°F (2008) | 7.0°F (2025) | 1.81 in (2014) |
| December 10 | 61.0°F (2015) | 7.0°F (2000) | 2.53 in (2023) |
| December 11 | 64.0°F (2024) | 12.9°F (2005) | 1.70 in (2024) |
| December 12 | 66.0°F (2015) | 10.2°F (2013) | 2.88 in (2010) |
| December 13 | 61.0°F (2020) | 11.1°F (2013) | 0.89 in (2009) |
| December 14 | 62.1°F (2015) | 0.0°F (2005) | 2.05 in (2019) |
| December 15 | 64.0°F (2015) | 1.9°F (2005) | 0.61 in (2003) |
| December 16 | 61.0°F (2021) | 6.3°F (2013) | 1.48 in (2005) |
| December 17 | 61.0°F (2000) | 2.1°F (2013) | 2.01 in (2000) |
| December 18 | 63.0°F (2023) | 5.2°F (2007) | 1.47 in (2023) |
| December 19 | 57.9°F (2025) | 3.2°F (2020) | 1.31 in (2025) |
| December 20 | 59.0°F (2002) | 3.0°F (2004) | 2.24 in (2002) |
| December 21 | 62.1°F (2018) | -2.0°F (2004) | 2.83 in (2018) |
| December 22 | 61.0°F (2013) | 4.1°F (2008) | 0.56 in (2022) |
| December 23 | 57.9°F (2004) | -2.7°F (2008) | 1.33 in (2004) |
| December 24 | 66.0°F (2015) | 7.2°F (2022) | 1.01 in (2003) |
| December 25 | 64.9°F (2015) | 8.1°F (1999) | 2.16 in (2020) |
| December 26 | 57.9°F (2015) | 10.0°F (2000) | 0.66 in (2009) |
| December 27 | 61.0°F (2015) | 7.0°F (2025) | 0.89 in (2011) |
| December 28 | 57.9°F (2008) | 3.0°F (2004) | 2.03 in (2023) |
| December 29 | 55.9°F (2003) | 3.2°F (2017) | 1.13 in (2013) |
| December 30 | 61.0°F (2024) | -0.8°F (2017) | 1.06 in (2019) |
| December 31 | 53.1°F (2024) | -2.7°F (2017) | 0.77 in (2018) |