Connecticut weather in May 2025

Expect 21°C daytime maximum temperatures in the shade with on average 8 hours of sunshine per day in Connecticut in May. Check more long-term weather averages for Connecticut in May before you book your next holiday to Connecticut in 2025/2026.

  • 21°C maximum daytime temperature in May in Connecticut (Hartford)21
    21°C max day temperature
  • 8 hours of sunshine per day
  • 12 days with some rainfall in May in Connecticut (Hartford)12
    12 days with some rainfall
  • 8°C minimum night-time temperature in May in Connecticut (Hartford)8
    8°C min night temperature
  • 15 hours of daylight per day in May in Connecticut (Hartford)15
    15 hours of daylight per day
  • No heat & humidity in May in Connecticut (Hartford)0
    No heat & humidity
  • 101 mm monthly rainfall in May in Connecticut (Hartford)101
    101 mm of monthly rainfall
  • UV (maximum) index 7 (High) in May in Connecticut (Hartford)7
    7 (High) UV index

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The May weather guide for Connecticut (Hartford) 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.

Top Connecticut destinations

Below are average maximum temperatures at popular destinations in Connecticut in May. Select a destination to see more weather parameters.

All Connecticut destinations

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

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How hot is it in Connecticut in May?

Daytime temperatures usually reach 21°C in Hartford, Connecticut in May, falling to 8°C at night.

How sunny is it in Connecticut in May?

There are normally 8 hours of bright sunshine each day in Hartford, Connecticut in May - that's 58% of daylight hours.

Does it rain in Connecticut in May?

There are usually 12 days with some rain in Hartford, Connecticut in May and the average monthly rainfall is 101mm.

Connecticut May sunrise & sunset times

Browse the sunrise and sunset times for Connecticut in May 2025. Select a month to view Connecticut sunrise and sunset times for the next 12 months. The Connecticut sunrise and sunset times shown below are for Hartford.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Thursday, 1st May 2025 04:47 18:50
Friday, 16th May 2025 04:30 19:05
Saturday, 31st May 2025 04:19 19:19

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