December weather in Hartford, CT
The average temperature in Hartford in December is 33.8°F (25.9°F–41.7°F). Average precipitation: 3.75 inches.
December is a winter month in Hartford, and is cooler than the annual average of 52°F. Daily temperatures swing about 15.8°F between overnight low and afternoon high. Expect about 11 days with precipitation. Daylight averages about 8h 59m. For travel, December is cold.
Avg High
41.7°F
Avg Low
25.9°F
Precipitation
3.75 in
Daylight
8h 59m
December records in Hartford
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| December 1 | 70.0°F (2001) | 8.1°F (1996) | 1.37 in (1977) |
| December 2 | 62.1°F (1970) | 3.9°F (1987) | 1.90 in (1996) |
| December 3 | 68.0°F (2009) | 5.0°F (1940) | 1.70 in (1986) |
| December 4 | 64.0°F (1950) | 3.0°F (1940) | 2.39 in (1968) |
| December 5 | 71.1°F (1982) | 3.0°F (1976) | 2.24 in (1920) |
| December 6 | 73.0°F (2001) | 10.0°F (1949) | 1.37 in (1945) |
| December 7 | 64.9°F (1982) | 3.0°F (1964) | 2.01 in (2011) |
| December 8 | 75.0°F (1998) | 5.0°F (1964) | 1.52 in (1976) |
| December 9 | 62.1°F (1966) | 5.0°F (1968) | 1.91 in (2014) |
| December 10 | 66.9°F (1946) | 1.9°F (1949) | 1.70 in (2023) |
| December 11 | 64.0°F (1971) | -2.0°F (1958) | 2.08 in (1952) |
| December 12 | 64.0°F (1931) | 1.9°F (1988) | 2.05 in (2008) |
| December 13 | 64.0°F (1979) | 1.9°F (1988) | 1.57 in (1983) |
| December 14 | 62.1°F (1984) | 1.9°F (1958) | 2.00 in (1920) |
| December 15 | 64.9°F (2015) | 1.0°F (1960) | 1.09 in (1981) |
| December 16 | 61.0°F (2021) | 1.9°F (1930) | 1.24 in (1972) |
| December 17 | 64.0°F (2000) | -6.0°F (1942) | 2.09 in (2000) |
| December 18 | 64.9°F (2023) | 3.0°F (1980) | 2.12 in (2023) |
| December 19 | 59.0°F (1986) | -2.9°F (1942) | 1.70 in (1986) |
| December 20 | 60.1°F (1923) | -9.9°F (1942) | 1.70 in (2002) |
| December 21 | 64.0°F (2018) | -6.0°F (1942) | 2.32 in (2018) |
| December 22 | 64.9°F (2013) | -6.0°F (1996) | 1.60 in (1973) |
| December 23 | 61.0°F (2013) | -5.1°F (1945) | 1.23 in (2004) |
| December 24 | 66.9°F (2015) | -4.0°F (1989) | 1.30 in (1994) |
| December 25 | 64.0°F (1964) | -9.9°F (1980) | 2.50 in (2020) |
| December 26 | 60.1°F (1982) | -8.0°F (1980) | 1.66 in (1957) |
| December 27 | 62.1°F (1982) | -2.0°F (1948) | 1.25 in (1975) |
| December 28 | 60.1°F (1949) | -5.1°F (1963) | 1.77 in (2023) |
| December 29 | 60.1°F (1982) | -11.0°F (1933) | 2.11 in (1966) |
| December 30 | 63.0°F (1984) | -11.9°F (1933) | 1.96 in (1942) |
| December 31 | 66.0°F (1965) | -8.0°F (1962) | 2.09 in (1948) |