Current Weather and Forecast in New Haven, CT
Connecticut, United States 🇺🇸
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About the weather in New Haven
New Haven has a humid subtropical climate. July is the warmest month, with average highs of 82°, and January the coldest, when nights fall to around 26°. December brings the most rain, on about 11 days, while July is the sunniest, with 11.5 hours of sunshine a day. Over a whole year it rains on roughly 126 days.
New Haven climate guide: monthly averages, seasons and the best time to visit
Common questions
When does New Haven drop below freezing?
Average overnight lows sit at or below 0°C in 4 months of the year, December through March.
What is the rainiest month in New Haven?
December, at 5.1 inches (130 mm) over about 11 days. November is the driest month, at 3.4 inches (87 mm).
What should I wear in New Haven?
It depends on the month: July runs to 82°F (28°C) while January holds at 39°F (4°C). The full month-by-month breakdown is in the packing notes above.
How humid does New Haven get?
Relative humidity averages 71% across the year, which reads as fairly humid. The most comfortable stretch falls in the drier half of the year.
What is the coldest month in New Haven?
January, with highs of 39°F (4°C) and lows near 26°F (-4°C). The coldest day in the 2015-2024 record fell to -8°F (-22°C).
Is there snow in New Haven?
Yes - about 12 days a year carry measurable snowfall, concentrated December through March.
What is the hottest month in New Haven?
July, averaging 82°F (28°C) by day and 68°F (20°C) overnight. The hottest single day in our 2015-2024 record for this location reached 95°F (35°C).
What is the best time to visit New Haven?
The best time to visit New Haven is generally May to October, when these are the warmest and brightest weeks of the year. Daytime temperatures in that window sit near 74°F (23°C), with rain on about 11 days a month. For the same question asked the other way round, see where else is warm in May.