Mystic weather in August 2025

Expect 79°F daytime maximum temperatures in the shade with on average 8 hours of sunshine per day in Mystic in August. Check more long-term weather averages for Mystic in August before you book your next holiday to Connecticut in 2025/2026.

  • 79°F maximum daytime temperature in August in Mystic79
    79°F max day temperature
  • 8 hours of sunshine per day
  • 9 days with some rainfall in August in Mystic9
    9 days with some rainfall
  • 61°F minimum night-time temperature in August in Mystic61
    61°F min night temperature
  • 14 hours of daylight per day in August in Mystic14
    14 hours of daylight per day
  • Low heat & humidity in August in MysticL
    Low heat & humidity
  • 4.0 inches monthly rainfall in August in Mystic4.0
    4.0 inches of monthly rainfall
  • UV (maximum) index 8 (Very High) in August in Mystic8
    8 (Very High) UV index
  • 68°F sea temperature in August in Mystic68
    68°F sea temperature

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The August 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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How hot is it in Mystic in August?

Daytime temperatures usually reach 79°F in Mystic in August with low heat and humidity, falling to 61°F at night.

How sunny is it in Mystic in August?

There are normally 8 hours of bright sunshine each day in Mystic in August - that's 59% of daylight hours.

How warm is the sea around Mystic in August?

The average sea temperature around Mystic in August is 68°F.

Does it rain in Mystic in August?

There are usually 9 days with some rain in Mystic in August and the average monthly rainfall is 4.0 inches.

What is the chance of a hurricane in Mystic in August?

On average less than 1 day in August in Mystic is likely to be affected by the passage of one or more tropical storms.

Mystic August sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Friday, 1st August 2025 04:43 19:04
Saturday, 16th August 2025 04:58 18:45
Sunday, 31st August 2025 05:13 18:22

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