Weather on December 18
New Haven, CT
55 Years of Data
Avg High
41°F
Avg Low
26°F
Warmest
2023
54°F avg
Coldest
1988
15°F avg
About This Date
December 18th in New Haven, CT typically brings chilly winter weather, with average highs around 41°F and lows near 26°F. Over 54 years of records, the warmest December 18th was in 2023 (54°F average), while the coldest was 1988 (15°F) — a 39°F range across recorded history. Precipitation has occurred on 28% of recorded December 18th dates, with snow falling 4% of the time. The last decade has been 2.9°F warmer on this date compared to 20-30 years ago.
The last decade has been 2.9°F warmer on this date compared to 20-30 years ago.
Planning for December 18th in New Haven, CT? Bring layers as temperatures can vary throughout the day.
Warming Trend
1.6°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 50° | 22° | 36° | — | — |
| 2024 | 53° | 30° | 42° | 1.27" | — |
| 2023warmest | 62° | 46° | 54° | 4.5" | — |
| 2022 | 43° | 34° | 38° | — | — |
| 2021 | 44° | 40° | 42° | 0.05" | — |
| 2020 | 33° | 21° | 27° | — | — |
| 2019 | 37° | 23° | 30° | — | — |
| 2018 | 41° | 26° | 34° | — | — |
| 2017 | 42° | 30° | 36° | — | — |
| 2016 | 53° | 30° | 42° | 0.03" | — |
| 2015 | 53° | 38° | 45° | 0.03" | — |
| 2014 | 47° | 38° | 42° | — | — |
| 2013 | 36° | 16° | 26° | — | — |
| 2012 | 51° | 40° | 45° | 1.52" | — |
| 2011 | 32° | 18° | 25° | — | — |
| 2010 | 37° | 18° | 28° | — | — |
| 2009 | 33° | 14° | 24° | — | — |
| 2008 | 42° | 26° | 34° | 0.03" | — |
| 2007 | 36° | 12° | 24° | — | — |
| 2006 | 54° | 42° | 48° | — | — |
| 2005 | 36° | 24° | 30° | — | — |
| 2004 | 41° | 15° | 28° | — | — |
| 2003 | 39° | 32° | 36° | — | — |
| 2002 | 40° | 16° | 28° | — | — |
| 2001 | 46° | 36° | 41° | 1.12" | — |
| 2000 | 38° | 22° | 30° | — | — |
| 1999 | 40° | 26° | 33° | — | — |
| 1997 | 53° | 26° | 40° | — | — |
| 1996 | 55° | 47° | 51° | 0.2" | — |
| 1995 | 36° | 19° | 27° | — | — |
| 1994 | 45° | 33° | 39° | 0.74" | — |
| 1993 | 39° | 20° | 29° | — | — |
| 1992 | 53° | 39° | 46° | 0.13" | — |
| 1991 | 37° | 19° | 28° | 0.13" | 0.5" |
| 1990 | 51° | 37° | 44° | 1.02" | — |
| 1989 | 31° | 17° | 24° | — | — |
| 1988coldest | 26° | 4° | 15° | — | — |
| 1987 | 36° | 22° | 29° | — | — |
| 1986 | 42° | 33° | 38° | 3.76" | — |
| 1985 | 30° | 20° | 25° | — | 0.3" |
| 1984 | 59° | 39° | 49° | — | — |
| 1983 | 37° | 25° | 31° | — | — |
| 1982 | 33° | 19° | 26° | — | — |
| 1981 | 31° | 29° | 30° | — | — |
| 1980 | 39° | 13° | 26° | — | — |
| 1979 | 33° | 18° | 25° | — | — |
| 1978 | 39° | 19° | 29° | — | — |
| 1977 | 41° | 27° | 34° | — | — |
| 1976 | 38° | 33° | 35° | — | — |
| 1975 | 38° | 19° | 28° | — | — |
| 1974 | 42° | 30° | 36° | — | — |
| 1973 | 31° | 19° | 25° | 0.84" | — |
| 1972 | 32° | 18° | 25° | — | — |
| 1971 | 43° | 29° | 36° | — | — |
54 years of data from NEW HAVEN