New Haven Weather in October

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

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

October is in the fall / autumn in New Haven and is typically the 6th warmest month of the year. Daytime maximum temperatures average around a cool 18°C (64°F), whilst at night 7°C (45°F) is normal.

New Haven weather averages (imperial / metric)
Daytime temperature 17.8°C 64°F
Nightly temperature 7.2°C 45°F
Average temperature 12.5°C 54.5°F
Daily sunshine 7.3 hrs
Avg rainfall 87 mm 3.4 ins
Rainy days 7 days
Sea temperature 15.8°C 60.5°F
Humidity 70%
Windspeed 16.6kph 10 mph

On average October is the 6th driest month of the year in New Haven with around 87mm 3.4 inches of rain making it a a little damp time to visit. This rainfall is typically spread over 7 days, although this may vary considerably.

On the flip side this corresponds to an average of 7.3 hours of sunshine per day.

October temperatures in New Haven

New Haven average temperature in October

October rainfall

New Haven average rain in October

October hourly sunshine

New Haven average rain in October

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 October 2025.

Other monthly averages

Best places to visit in October

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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