Mystic weather in May 2026

Expect daytime maximum temperatures of 66°F in Mystic, Connecticut in May based on long-term weather averages. There are 9 hours of sunshine per day on average with 11 days with some rainfall and typically 3.9 inches of rainfall in the month.

  • 66°F maximum daytime temperature in May in Mystic66
    66°F max day temperature
  • 9 hours of sunshine per day
  • 11 days with some rainfall in May in Mystic11
    11 days with some rainfall
  • 46°F minimum night-time temperature in May in Mystic46
    46°F min night temperature
  • 15 hours of daylight per day in May in Mystic15
    15 hours of daylight per day
  • No heat & humidity in May in Mystic0
    No heat & humidity
  • 3.9 inches monthly rainfall in May in Mystic3.9
    3.9 inches of monthly rainfall
  • UV (maximum) index 7 (High) in May in Mystic7
    7 (High) UV index
  • 50°F sea temperature in May in Mystic50
    50°F sea temperature

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The May weather guide for Connecticut (Mystic) 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)  |  Imperial (°F)

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More about the USA

How hot is it in Mystic in May?

Daytime temperatures usually reach 66°F in Mystic in May, falling to 46°F at night.

How sunny is it in Mystic in May?

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

How warm is the sea around Mystic in May?

The average sea temperature around Mystic in May is 50°F.

Does it rain in Mystic in May?

There are usually 11 days with some rain in Mystic in May and the average monthly rainfall is 3.9 inches.

Mystic May sunrise & sunset times

Browse the sunrise and sunset times for Mystic in May 2026. Select a month to view Mystic sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Friday, 1st May 2026 04:45 18:46
Saturday, 16th May 2026 04:28 19:01
Sunday, 31st May 2026 04:17 19:14

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