Weather on December 21
Hartford, CT
55 Years of Data
Avg High
39°F
Avg Low
24°F
Warmest
2018
52°F avg
Coldest
1983
10°F avg
About This Date
December 21st in Hartford, CT typically brings cold winter weather, with average highs around 39°F and lows near 24°F. Over 55 years of records, the warmest December 21st was in 2018 (52°F average), while the coldest was 1983 (10°F) — a 42°F range across recorded history. Precipitation has occurred on 31% of recorded December 21st dates, with snow falling 7% of the time (heaviest snowfall: 4"). The last decade has been 3.4°F warmer on this date compared to 20-30 years ago.
The last decade has been 3.4°F warmer on this date compared to 20-30 years ago.
Planning for December 21st in Hartford, CT? Bundle up with warm layers and protect extremities from the cold. Consider bringing rain gear or an umbrella.
Warming Trend
1.5°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 46° | 31° | 38° | — | — |
| 2024 | 30° | 17° | 24° | 0.03" | — |
| 2023 | 39° | 25° | 32° | — | — |
| 2022 | 39° | 20° | 30° | — | — |
| 2021 | 44° | 27° | 36° | — | — |
| 2020 | 38° | 27° | 33° | — | — |
| 2019 | 30° | 16° | 23° | — | — |
| 2018warmest | 64° | 39° | 52° | 5.89" | — |
| 2017 | 37° | 27° | 32° | — | — |
| 2016 | 40° | 19° | 30° | — | — |
| 2015 | 53° | 33° | 43° | — | — |
| 2014 | 34° | 31° | 33° | 0.05" | — |
| 2013 | 56° | 40° | 48° | — | — |
| 2012 | 57° | 38° | 47° | 1.96" | — |
| 2011 | 57° | 35° | 46° | 0.38" | — |
| 2010 | 38° | 29° | 34° | — | — |
| 2009 | 34° | 23° | 29° | — | — |
| 2008 | 29° | 18° | 24° | 0.61" | — |
| 2007 | 34° | 30° | 32° | — | — |
| 2006 | 52° | 30° | 41° | — | — |
| 2005 | 31° | 13° | 22° | — | — |
| 2004 | 31° | 4° | 17° | — | — |
| 2003 | 36° | 19° | 27° | — | — |
| 2002 | 45° | 33° | 39° | — | — |
| 2001 | 39° | 30° | 35° | — | — |
| 2000 | 33° | 18° | 25° | — | — |
| 1999 | 46° | 34° | 40° | 0.08" | — |
| 1998 | 47° | 37° | 42° | — | — |
| 1997 | 44° | 25° | 34° | — | — |
| 1996 | 29° | 2° | 15° | — | — |
| 1995 | 29° | 15° | 22° | 0.25" | — |
| 1994 | 42° | 22° | 32° | — | — |
| 1993 | 45° | 29° | 37° | 0.97" | — |
| 1992 | 34° | 23° | 28° | — | — |
| 1991 | 43° | 20° | 31° | 0.13" | — |
| 1990 | 51° | 32° | 42° | — | — |
| 1989 | 28° | 5° | 17° | — | — |
| 1988 | 47° | 38° | 42° | — | — |
| 1987 | 42° | 31° | 36° | — | — |
| 1986 | 42° | 28° | 35° | — | — |
| 1985 | 29° | 14° | 21° | — | 0.2" |
| 1984 | 47° | 22° | 34° | — | — |
| 1983coldest | 20° | 1° | 10° | 0.36" | 2" |
| 1982 | 35° | 27° | 31° | — | 0.3" |
| 1981 | 28° | 7° | 17° | — | — |
| 1980 | 21° | 10° | 16° | — | — |
| 1979 | 30° | 15° | 23° | — | — |
| 1978 | 34° | 25° | 29° | 1.57" | — |
| 1977 | 37° | 29° | 33° | 0.38" | — |
| 1976 | 48° | 25° | 36° | 1.4" | — |
| 1975 | 17° | 9° | 13° | 0.08" | 4" |
| 1974 | 43° | 30° | 36° | — | — |
| 1973 | 58° | 21° | 39° | 3.35" | — |
| 1972 | 34° | 18° | 26° | 0.64" | — |
| 1971 | 45° | 27° | 36° | — | — |
55 years of data from HARTFORD BRAINARD FLD