New Haven Weather in May

What's the weather like in New Haven (Connecticut) in May 2025?

The climate in New Haven during May can be summarized as mild and a little damp.

May is in the spring in New Haven and is typically the 5th warmest month of the year. Daytime maximum temperatures average around 20°C (67°F), whilst at night 9°C (48°F) is normal.

New Haven weather averages (imperial / metric)
Daytime temperature 19.5°C 67°F
Nightly temperature 8.8°C 47.8°F
Average temperature 14.1°C 57.4°F
Daily sunshine 9.1 hrs
Avg rainfall 89 mm 3.5 ins
Rainy days 11 days
Sea temperature 10.3°C 50.6°F
Humidity 69%
Windspeed 17.3kph 11 mph

On average May is the 6th wettest month of the year in New Haven with around 89mm 3.5 inches of rain making it a a little damp time to visit. This rainfall is typically spread over 11 days, although this may vary considerably.

On the flip side this corresponds to an average of 9.1 hours of sunshine per day.

May temperatures in New Haven

New Haven average temperature in May

May rainfall

New Haven average rain in May

May hourly sunshine

New Haven average rain in May

The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in New Haven in May 2025.

Other monthly averages

Best places to visit in May

UV index Best time to go?

Beta

Current (hourly) weather 15 day forecast

New Haven weather stats

New Haven weather statistics
Hottest month: July 27.2°C 81°F
Driest month: June 76mm 3ins
Sunniest month: August 9.1hrs
Coldest month: January 1.8°C 35.2°F
Wettest month: November 103mm 4.1ins
Map showing location of New Haven (41.30815, -72.92816) New Haven map pin © Google

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