Mystic (CT) Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Mystic.
Climate overview of Mystic
The climate in Mystic, Connecticut, United States of America, is marked by large temperature swings across the seasons, ranging from 27°C (81°F) in July to 4°C (39°F) in February.
With around 1228 mm (48 in) of annual rain/snowfall, Mystic has a notably wet climate. However, this rain/snowfall is not evenly distributed — the city has warm summers and cold winters. The wettest month is December. July is the sunniest month, averaging 9.7 hours of sunshine per day.
Mystic Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Mystic - and find the best time to visit.
Monthly Temperature in Mystic
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
Rainfall in Mystic
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
Sunshine Hours in Mystic
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
Humidity in Mystic by Month
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
Best Time to Visit Mystic
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
- Best overall: August and September
- Warmest weather: July and August
- Most sunshine: June and July
- Seasonal pattern: Warm summers and cold winters
- Coldest conditions: February, with freezing nights around -5°C (23°F).
Frequently asked questions about the climate in Mystic
What is the best time to visit Mystic?
August and September typically offer the most optimal weather in Mystic. In contrast, January, February, March and December tend to have less optimal conditions. Mystic has warm summers and cold winters.
What temperatures can I expect in Mystic?
Daytime highs range from 4°C (39°F) in February to 27°C (81°F) in July. Nighttime lows range from -5°C (23°F) to 19°C (66°F). Temperatures vary considerably through the year.
How much rain does Mystic get?
Annual rainfall is around 1228 mm (48 in). December is the wettest month with 127 mm (5 in), while August is the driest with 89 mm (3.5 in).
How sunny is Mystic?
Mystic receives around 2,598 hours of sunshine per year. July is the sunniest month with 290 hours, while November is the cloudiest with just 147 hours. Overall, Mystic enjoys abundant sunshine.
Mystic 3-Day Forecast
Mystic (CT) 3-Day Forecast
Mystic on the map
Mystic is highlighted - select any city to see its climate.
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