New Haven weather in May 2025

Expect 19°C daytime maximum temperatures in the shade with on average 9 hours of sunshine per day in New Haven in May. Check more long-term weather averages for New Haven in May before you book your next holiday to Connecticut in 2025/2026.

  • 19°C maximum daytime temperature in May in New Haven19
    19°C max day temperature
  • 9 hours of sunshine per day
  • 11 days with some rainfall in May in New Haven11
    11 days with some rainfall
  • 9°C minimum night-time temperature in May in New Haven9
    9°C min night temperature
  • 15 hours of daylight per day in May in New Haven15
    15 hours of daylight per day
  • No heat & humidity in May in New Haven0
    No heat & humidity
  • 89 mm monthly rainfall in May in New Haven89
    89 mm of monthly rainfall
  • UV (maximum) index 7 (High) in May in New Haven7
    7 (High) UV index
  • 11°C sea temperature in May in New Haven11
    11°C sea temperature

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The May 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 May?

Daytime temperatures usually reach 19°C in New Haven in May, falling to 9°C at night.

How sunny is it in New Haven in May?

There are normally 9 hours of bright sunshine each day in New Haven in May - that's 59% of daylight hours.

Is the sea cold around New Haven in May?

The average sea temperature around New Haven in May is 11°C.

Does it rain in New Haven in May?

There are usually 11 days with some rain in New Haven in May and the average monthly rainfall is 89mm.

New Haven May sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Thursday, 1st May 2025 04:49 18:50
Friday, 16th May 2025 04:32 19:05
Saturday, 31st May 2025 04:21 19:18

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