New Haven weather in October 2025

Expect 18°C daytime maximum temperatures in the shade with on average 7 hours of sunshine per day in New Haven in October. Check more long-term weather averages for New Haven in October before you book your next holiday to Connecticut in 2025/2026.

  • 18°C maximum daytime temperature in October in New Haven18
    18°C max day temperature
  • 7 hours of sunshine per day
  • 7 days with some rainfall in October in New Haven7
    7 days with some rainfall
  • 7°C minimum night-time temperature in October in New Haven7
    7°C min night temperature
  • 11 hours of daylight per day in October in New Haven11
    11 hours of daylight per day
  • No heat & humidity in October in New Haven0
    No heat & humidity
  • 87 mm monthly rainfall in October in New Haven87
    87 mm of monthly rainfall
  • UV (maximum) index 4 (Moderate) in October in New Haven4
    4 (Moderate) UV index
  • 17°C sea temperature in October in New Haven17
    17°C sea temperature

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The October weather guide for Connecticut (New Haven) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

Metric (°C / mm)  |  Imperial (°F / inches)

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More about the USA

How hot is it in New Haven in October?

Daytime temperatures usually reach 18°C in New Haven in October, falling to 7°C at night.

How sunny is it in New Haven in October?

There are normally 7 hours of bright sunshine each day in New Haven in October - that's 61% of daylight hours.

How warm is the sea around New Haven in October?

The average sea temperature around New Haven in October is 17°C.

Does it rain in New Haven in October?

There are usually 7 days with some rain in New Haven in October and the average monthly rainfall is 87mm.

New Haven October sunrise & sunset times

Browse the sunrise and sunset times for New Haven in October 2025. Select a month to view New Haven sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Wednesday, 1st October 2025 05:49 17:33
Thursday, 16th October 2025 06:05 17:09
Friday, 31st October 2025 06:22 16:48

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