New Haven (CT) Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit New Haven.
Climate overview of New Haven
New Haven, Connecticut, United States of America, experiences significant temperature variation throughout the year. Summers bring daytime highs of 29°C (84°F) in July, while winters cool to 4°C (39°F) in January.
With around 1289 mm (51 in) of annual rain/snowfall, New Haven has a notably wet climate. The wettest month is June. The sunniest month is July, with 9.8 hours of sunshine per day on average.
New Haven Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in New Haven — and find the best time to visit.
Monthly Temperature in New Haven
Depending on the time of the year, temperatures range from comfortable to chilly in New Haven. Average daytime temperatures reach a comfortable 29°C (84°F) in July. In January, the coolest month of the year, temperatures drop to a chilly 4°C (39°F).
At night, temperatures range from around 19°C (66°F) in July to -6°C (21°F) in January.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in New Haven
New Haven has a relatively rain/snowy climate with high precipitation levels, averaging 1289 mm (51 in) of rain/snowfall annually. Despite minor fluctuations, New Haven enjoys fairly consistent precipitation throughout the year. In June, you can expect around 131 mm (5.2 in) of precipitation, while in January, New Haven receives about 87 mm (3.4 in). For more details, please visit our New Haven Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Sunshine Hours in New Haven
New Haven can be enjoyed more throughout the sunniest month of July under a blue sky, with approximately 9.8 hours of sunshine daily. In contrast, the city experiences much darker days in November, with only 4.6 hours of sunlight per day.
Visit our detailed sunshine hours page for more information.
Monthly hours of sunshine
Daily hours of sunshine
Daily percentage of sunshine
Humidity in New Haven by Month
The relative humidity is high throughout the year in New Haven.
The city experiences its highest humidity in September, reaching 72%. In April, the humidity drops to its lowest level at 58%. What does this mean? Read our detailed page on humidity levels for further details.
Relative humidity over the year
Best Time to Visit New Haven
Rainfall during this time ranges from 96 mm (3.8 in) in September to 131 mm (5.2 in) in June. This means you can expect a mix of sunny days and occasional showers. Planning your next adventure but unsure where to go? Our climate tool suggests perfect locations tailored to your preferred weather conditions. Discover your ideal travel destination with our weather planner.
Frequently asked questions about the climate in New Haven
What is the best time to visit New Haven?
July and September typically offer the most optimal weather in New Haven. In contrast, January, February, March and December tend to have less optimal conditions.
What temperatures can I expect in New Haven?
Daytime highs range from 4°C (39°F) in January to 29°C (84°F) in July. Nighttime lows range from -6°C (21°F) to 19°C (66°F). Temperatures vary considerably through the year.
How much rain does New Haven get?
Annual rainfall is around 1289 mm (51 in). June is the wettest month with 131 mm (5.2 in), while January is the driest with 87 mm (3.4 in).
How sunny is New Haven?
New Haven receives around 2,579 hours of sunshine per year. July is the sunniest month with 293 hours, while November is the cloudiest with just 139 hours. Overall, New Haven enjoys abundant sunshine.
New Haven 3-Day Forecast
New Haven (CT) 3-Day Forecast
New Haven on the map
New Haven is highlighted — select any city to see its climate.
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Where to go in July — average daytime high across popular destinations.
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