Weather on March 18
New Haven, CT
55 Years of Data
Avg High
49°F
Avg Low
31°F
Warmest
1990
61°F avg
Coldest
1993
24°F avg
About This Date
March 18th in New Haven, CT typically brings chilly spring weather, with average highs around 49°F and lows near 31°F. Over 55 years of records, the warmest March 18th was in 1990 (61°F average), while the coldest was 1993 (24°F) — a 37°F range across recorded history. Precipitation has occurred on 24% of recorded March 18th dates, with snow falling 2% of the time. The last decade has been 4.0°F warmer on this date compared to 20-30 years ago.
The last decade has been 4.0°F warmer on this date compared to 20-30 years ago.
Planning for March 18th in New Haven, CT? Bring layers as temperatures can vary throughout the day.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2026 | 35° | 26° | 31° | — | — |
| 2025 | 62° | 36° | 49° | — | — |
| 2024 | 53° | 40° | 46° | — | — |
| 2023 | 52° | 44° | 48° | 0.08" | — |
| 2022 | 66° | 45° | 55° | — | — |
| 2021 | 46° | 41° | 44° | 1.93" | — |
| 2020 | 51° | 28° | 40° | — | — |
| 2019 | 46° | 22° | 34° | — | — |
| 2018 | 39° | 24° | 32° | — | — |
| 2017 | 40° | 20° | 30° | — | — |
| 2016 | 53° | 39° | 46° | — | — |
| 2015 | 35° | 26° | 31° | — | — |
| 2014 | 39° | 19° | 29° | — | — |
| 2013 | 36° | 22° | 29° | 0.41" | — |
| 2012 | 61° | 35° | 48° | — | — |
| 2011 | 75° | 42° | 59° | — | — |
| 2010 | 63° | 33° | 48° | — | — |
| 2009 | 53° | 28° | 41° | — | — |
| 2008 | 41° | 27° | 34° | — | — |
| 2007 | 39° | 26° | 33° | — | — |
| 2006 | 42° | 27° | 35° | — | — |
| 2005 | 46° | 21° | 34° | — | — |
| 2004 | 34° | 24° | 29° | 0.03" | — |
| 2003 | 61° | 36° | 48° | — | — |
| 2002 | 39° | 32° | 36° | 0.84" | — |
| 2001 | 45° | 33° | 39° | 0.08" | — |
| 2000 | 38° | 20° | 29° | — | — |
| 1998 | 44° | 29° | 36° | 0.61" | — |
| 1997 | 46° | 34° | 40° | — | — |
| 1996 | 58° | 32° | 45° | — | — |
| 1995 | 54° | 36° | 45° | — | — |
| 1994 | 34° | 18° | 26° | — | 0.5" |
| 1993coldest | 37° | 10° | 24° | 0.36" | — |
| 1992 | 45° | 26° | 35° | — | — |
| 1991 | 58° | 32° | 45° | — | — |
| 1990warmest | 68° | 53° | 61° | 1.09" | — |
| 1989 | 68° | 52° | 60° | 0.64" | — |
| 1988 | 49° | 30° | 39° | — | — |
| 1987 | 50° | 33° | 42° | — | — |
| 1986 | 55° | 39° | 47° | — | — |
| 1985 | 52° | 27° | 39° | — | — |
| 1984 | 39° | 33° | 36° | — | — |
| 1983 | 51° | 40° | 45° | — | — |
| 1982 | 52° | 29° | 40° | — | — |
| 1981 | 38° | 15° | 26° | — | — |
| 1980 | 53° | 44° | 49° | 4.32" | — |
| 1979 | 45° | 29° | 37° | — | — |
| 1978 | 50° | 23° | 37° | — | — |
| 1977 | 50° | 29° | 39° | 0.25" | — |
| 1976 | 37° | 18° | 27° | — | — |
| 1975 | 52° | 33° | 42° | — | — |
| 1974 | 50° | 31° | 40° | — | — |
| 1973 | 51° | 31° | 41° | — | — |
| 1972 | 51° | 37° | 44° | 0.36" | — |
| 1971 | 45° | 29° | 37° | — | — |
55 years of data from NEW HAVEN