Mystic weather in October 2025

Expect 63°F daytime maximum temperatures in the shade with on average 7 hours of sunshine per day in Mystic in October. Check more long-term weather averages for Mystic in October before you book your next holiday to Connecticut in 2025/2026.

  • 63°F maximum daytime temperature in October in Mystic63
    63°F max day temperature
  • 7 hours of sunshine per day
  • 8 days with some rainfall in October in Mystic8
    8 days with some rainfall
  • 45°F minimum night-time temperature in October in Mystic45
    45°F min night temperature
  • 11 hours of daylight per day in October in Mystic11
    11 hours of daylight per day
  • No heat & humidity in October in Mystic0
    No heat & humidity
  • 3.9 inches monthly rainfall in October in Mystic3.9
    3.9 inches of monthly rainfall
  • UV (maximum) index 4 (Moderate) in October in Mystic4
    4 (Moderate) UV index
  • 61°F sea temperature in October in Mystic61
    61°F sea temperature

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The October 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 warm is it in Mystic in October?

Daytime temperatures usually reach 63°F in Mystic in October, falling to 45°F at night.

How sunny is it in Mystic in October?

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

How warm is the sea around Mystic in October?

The average sea temperature around Mystic in October is 61°F.

Does it rain in Mystic in October?

There are usually 8 days with some rain in Mystic in October and the average monthly rainfall is 3.9 inches.

Mystic October sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Wednesday, 1st October 2025 05:45 17:29
Thursday, 16th October 2025 06:01 17:05
Friday, 31st October 2025 06:18 16:44

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