Heat Advisory
* WHAT...Heat index values up to 99 expected.
* WHERE...Portions of northern Connecticut, central, eastern,
northeastern, southeastern and western Massachusetts and
northern and southern Rhode Island.
* WHEN...From 11 AM this morning to 8 PM EDT Friday.
* IMPACTS...Hot tempera…
Heat Advisory
* WHAT...Heat index values up to 98 expected.
* WHERE...In Connecticut, Southern Litchfield County. In New York,
Eastern Ulster and Western Dutchess Counties.
* WHEN...From 11 AM this morning to 8 PM EDT Friday.
* IMPACTS...Hot temperatures and high humidity may cause heat
ill…
Tomorrow in New Haven looks
sunny, with a high of 87°
and an overnight low of 72°.
There is a 76% chance of rain - plan accordingly.
Winds top out near 20 mph,
and the UV index reaches 8 (very high).
Located in Connecticut, United States, New Haven experiences a humid subtropical climate with hot, humid summers and generally mild winters. Afternoon temperatures peak near 82°F (28°C) in July and dip to about 39°F (4°C) in January, with around 51.6 inches (1310 mm) of precipitation falling across the year.
New Haven weather: quick facts
Hottest month: July - highs near 82°F (28°C)
Coldest month: January - highs near 39°F (4°C)
Record high: 95°F (35°C) · Record low: -8°F (-22°C) (2015–2024)
Wettest month: December (11 rainy days) · Sunniest: July (11.5 h sun/day)
Climate type:humid subtropical - hot, humid summers and generally mild winters
Snow: about 12 days a year
Temperatures through the year
The warmest stretch of the year centers on July. Highs average 82°F (28°C) and overnight lows stay near 68°F (20°C). The coolest month is January, with typical highs of 39°F (4°C) and lows around 26°F (-4°C). Based on 2015–2024 weather data, temperatures have reached as high as 95°F (35°C) and dropped as low as -8°F (-22°C).
Rain, sun and snow
December is usually the wettest month. It brings about 5.1 inches (130 mm) of rain over 11 days, while November is the driest. July brings the most sunshine, averaging 11.5 hours of sun a day. Snow falls on about 12 days in a typical year, mostly from December through March.
Season by season
Spring (March through May)
Spring in New Haven is crisp but comfortable, with daytime highs averaging 57°F (14°C) and nights around 41°F (5°C); expect showers on roughly 34 days across the season, plus around 3 snowy days.
Summer (June through August)
Summer in New Haven is pleasantly warm, with daytime highs averaging 80°F (26°C) and nights around 65°F (18°C); expect showers on roughly 34 days across the season.
Fall (September through November)
Fall in New Haven is mild, with daytime highs averaging 64°F (18°C) and nights around 50°F (10°C); expect showers on roughly 27 days across the season.
Winter (December through February)
Winter in New Haven is brisk and cold, with daytime highs averaging 41°F (5°C) and nights around 28°F (-2°C); expect showers on roughly 31 days across the season, plus around 9 snowy days.
Average temperatures in New Haven by month
Monthly averages for New Haven based on 2015–2024 weather data.
July is the hottest month in New Haven, with average highs of 82°F (28°C) and overnight lows near 68°F (20°C). In the past decade the temperature has peaked at 95°F (35°C).
What is the coldest month in New Haven?
January is the coldest month, with highs averaging 39°F (4°C) and lows around 26°F (-4°C). The lowest reading in recent years was -8°F (-22°C).
What is the rainiest month in New Haven?
December is typically the wettest month, averaging 5.1 inches (130 mm) of precipitation across about 11 days. November is usually the driest.
Does it snow in New Haven?
Yes. New Haven averages about 12 days of snowfall a year, concentrated December through March.
What is the best time to visit New Haven?
The best time to visit New Haven is generally May to October, when warm days, manageable rainfall and plenty of daylight line up. Daytime temperatures in that window typically sit near 74°F (23°C).
How sunny is New Haven?
New Haven averages 8.6 hours of sunshine per day across the year. July is the sunniest month at about 11.5 hours of sun a day.
Is New Haven humid?
Relative humidity in New Haven averages about 71% over the year, which feels fairly humid. The most comfortable months tend to fall in the drier part of the year.