Weather on December 18
New Haven, CT
55 Years of Data
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.
| 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° | — | — |
New Haven, CT Temperature Range by Month
Average monthly highs and lows. The shaded band shows the typical daily temperature range.
New Haven, CT Monthly Precipitation
Average rainfall and snowfall per month, in inches.
New Haven, CT Daily Temperature Calendar
Average daily high temperature for every day of the year. Each cell is the climatological mean for that calendar day across 55 years of NOAA data.
Best Time to Visit New Haven, CT
New Haven, CT has no months that meet our "pleasant" threshold — every season has tradeoffs.