Weather on December 31
New Haven, CT
55 Years of Data
Avg High
40°F
Avg Low
26°F
Warmest
2021
49°F avg
Coldest
2017
14°F avg
About This Date
December 31st in New Haven, CT typically brings chilly winter weather, with average highs around 40°F and lows near 26°F. Over 54 years of records, the warmest December 31st was in 2021 (49°F average), while the coldest was 2017 (14°F) — a 35°F range across recorded history. Precipitation has occurred on 37% of recorded December 31st dates, with snow falling 2% of the time. The last decade has been 6.2°F warmer on this date compared to 20-30 years ago.
The last decade has been 6.2°F warmer on this date compared to 20-30 years ago.
Planning for December 31st in New Haven, CT? Bring layers as temperatures can vary throughout the day. Consider bringing rain gear or an umbrella.
Warming Trend
0.6°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 34° | 29° | 31° | — | — |
| 2024 | 53° | 35° | 44° | 0.71" | — |
| 2023 | 43° | 29° | 36° | — | — |
| 2022 | 53° | 34° | 43° | 0.97" | — |
| 2021warmest | 51° | 46° | 49° | 0.03" | — |
| 2020 | 47° | 35° | 41° | 0.84" | — |
| 2019 | 44° | 36° | 40° | 0.03" | — |
| 2018 | 45° | 29° | 37° | 2.49" | — |
| 2017coldest | 19° | 8° | 14° | — | — |
| 2016 | 44° | 31° | 38° | — | — |
| 2015 | 48° | 34° | 41° | 0.23" | — |
| 2014 | 34° | 18° | 26° | — | — |
| 2013 | 31° | 16° | 24° | — | — |
| 2012 | 39° | 28° | 34° | — | — |
| 2011 | 47° | 32° | 39° | 0.05" | — |
| 2010 | 45° | 23° | 34° | — | — |
| 2009 | 35° | 31° | 33° | 0.43" | — |
| 2008 | 32° | 12° | 22° | — | — |
| 2007 | 45° | 25° | 35° | 0.48" | — |
| 2006 | 42° | 29° | 36° | — | — |
| 2005 | 31° | 25° | 28° | 0.36" | — |
| 2004 | 47° | 23° | 35° | — | — |
| 2003 | 43° | 34° | 38° | — | — |
| 2002 | 44° | 34° | 39° | 0.13" | — |
| 2001 | 32° | 21° | 27° | — | — |
| 2000 | 30° | 17° | 24° | — | — |
| 1999 | 38° | 21° | 29° | — | — |
| 1997 | 37° | 27° | 32° | 0.15" | — |
| 1996 | 38° | 18° | 28° | 0.1" | 1" |
| 1995 | 39° | 18° | 28° | — | — |
| 1994 | 35° | 17° | 26° | 0.05" | — |
| 1993 | 29° | 5° | 17° | — | — |
| 1992 | 44° | 37° | 41° | 1.42" | — |
| 1991 | 38° | 20° | 29° | — | — |
| 1990 | 56° | 31° | 43° | — | — |
| 1989 | 37° | 14° | 26° | 0.38" | — |
| 1988 | 47° | 35° | 41° | — | — |
| 1987 | 33° | 11° | 22° | — | — |
| 1986 | 41° | 30° | 36° | — | — |
| 1985 | 46° | 25° | 35° | — | — |
| 1984 | 47° | 31° | 39° | — | — |
| 1983 | 32° | 14° | 23° | — | — |
| 1982 | 35° | 27° | 31° | — | — |
| 1981 | 33° | 19° | 26° | — | — |
| 1980 | 31° | 12° | 21° | — | — |
| 1979 | 47° | 34° | 40° | — | — |
| 1978 | 50° | 40° | 45° | — | — |
| 1977 | 44° | 30° | 37° | — | — |
| 1976 | 24° | 18° | 21° | — | — |
| 1975 | 45° | 35° | 40° | 0.08" | — |
| 1974 | 45° | 32° | 38° | — | — |
| 1973 | 40° | 33° | 36° | — | — |
| 1972 | 50° | 32° | 41° | 2.29" | — |
| 1971 | 41° | 22° | 31° | 1.52" | — |
54 years of data from NEW HAVEN