Mystic (CT) Weather & Climate: Best Time to Visit

In Mystic, temperatures differ significantly between summer and winter months. Average daytime temperatures reach a comfortable 27°C (81°F) in July. In February, the coolest month of the year, temperatures drop to a chilly 4°C (39°F).

At night, temperatures range from around 19°C (66°F) in July to -5°C (23°F) in February.

Check out our detailed temperature page for more information.

Temperature ranges by month

Mystic experiences significant rain/snowfall throughout the year, averaging 1228 mm (48 in) of precipitation annually. Despite minor fluctuations, Mystic enjoys fairly consistent precipitation throughout the year. In December, you can expect around 127 mm (5 in) of precipitation, while in August, Mystic receives about 89 mm (3.5 in). For more details, please visit our Mystic Precipitation page.

The mean monthly precipitation over the year, including rain, hail, and snow

The average number of days each month with precipitation

Mystic can be enjoyed more throughout the sunniest month of July under a blue sky, with approximately 9.7 hours of sunshine daily. In contrast, the city experiences much darker days in November, with only 4.9 hours of sunlight per day.

Visit our detailed sunshine hours page for more information.

Monthly hours of sunshine

Daily hours of sunshine

Daily percentage of sunshine

The relative humidity is high throughout the year in Mystic.

The city experiences its highest humidity in August, reaching 73%. In April, the humidity drops to its lowest level at 61%. What does this mean? Read our detailed page on humidity levels for further details.

Relative humidity over the year