New Haven averages 7 days a year above 90°F, with April the wettest month at 4.19 in of normal rain. The hottest day on record was 101°F on Jul 22, 2011; the coldest, −6°F on Feb 14, 2016. The single biggest 24-hour rain event recorded was 5.24 in on Jun 19, 1972.
Climate and Average Weather Year Round in New Haven
Year-round temperature
In New Haven, the warmest months are June through September, with average daily highs between 75°F and 82°F. The coldest stretch runs December through February, with highs between 38°F and 44°F and overnight lows reaching 23°F.
Rainfall through the year
Rainfall in New Haven averages 3.5 in per month over the long run. April is the wettest at 4.2 in, while January is the driest at 2.7 in.
Days at 90 °F or hotter
New Haven averages 7.0 days per year at 90 °F or hotter. The hottest year on record saw 17 such days (2022); the coolest just 1 (1971).
Precipitation this year
As of May 28, New Haven has received 12.4 in of precipitation this year — 25% below the long-term normal for this point in the year (16.6 in).