Mystic
Connecticut, USA
Long-term weather forecast
Long-term weather forecast

Monthly weather forecast and climate
Mystic, CT

January, like December, in Mystic, Connecticut, is a wintry winter month, with average temperature varying between 26.6°F (-3°C) and 36.5°F (2.5°C). With an average high-temperature of 36.5°F (2.5°C) and an average low-temperature of 26.6°F (-3°C), January is the coldest month. Weather in January »

February, the last month of the winter, in Mystic, is also a wintry month, with temperature in the range of an average high of 38.1°F (3.4°C) and an average low of 27.3°F (-2.6°C). In February, the average high-temperature is practically the same as in January - a still cold 38.1°F (3.4°C). Weather in February »

The first month of the spring, March, is a frosty month in Mystic, Connecticut, with temperature in the range of an average high of 43.3°F (6.3°C) and an average low of 33.4°F (0.8°C). In Mystic, the average high-temperature is almost the same as in February - a frosty 43.3°F (6.3°C). Weather in March »

April is a cool spring month in Mystic, Connecticut, with average temperature fluctuating between 52.5°F (11.4°C) and 42.4°F (5.8°C). In Mystic, the average high-temperature rises, from a chilly 43.3°F (6.3°C) in March, to a fresh 52.5°F (11.4°C). Weather in April »

May, the last month of the spring, in Mystic, is an enjoyable month, with average temperature varying between 62.6°F (17°C) and 50.7°F (10.4°C). In May, the average high-temperature rises, from a fresh 52.5°F (11.4°C) in April, to an enjoyable 62.6°F (17°C). Weather in May »

June, the first month of the summer, in Mystic, is a pleasant month, with average temperature varying between 70.9°F (21.6°C) and 59.4°F (15.2°C). In Mystic, the average high-temperature slightly increases, from a comfortable 62.6°F (17°C) in May, to an agreeable 70.9°F (21.6°C). Weather in June »

July is a moderately hot summer month in Mystic, Connecticut, with average temperature fluctuating between 66.9°F (19.4°C) and 77.9°F (25.5°C). With an average high-temperature of 77.9°F (25.5°C) and an average low-temperature of 66.9°F (19.4°C), July is the warmest month. Weather in July »

The last month of the summer, August, is also a moderately hot month in Mystic, Connecticut, with average temperature fluctuating between 66.4°F (19.1°C) and 77.7°F (25.4°C). In August, the average high-temperature is essentially the same as in July - a still moderately hot 77.7°F (25.4°C). Weather in August »

The first month of the autumn, September, is also an agreeable month in Mystic, Connecticut, with average temperature ranging between min 59.9°F (15.5°C) and max 71.4°F (21.9°C). In September, the average high-temperature marginally drops, from a moderately hot 77.7°F (25.4°C) in August, to a pleasant 71.4°F (21.9°C). Weather in September »

October, like September, in Mystic, Connecticut, is another comfortable autumn month, with average temperature varying between 61.7°F (16.5°C) and 51.6°F (10.9°C). In Mystic, Connecticut, the average high-temperature drops, from a pleasant 71.4°F (21.9°C) in September, to a comfortable 61.7°F (16.5°C). Weather in October »

The last month of the autumn, November, is also a fresh month in Mystic, Connecticut, with average temperature fluctuating between 41.2°F (5.1°C) and 51.3°F (10.7°C). In November, the average high-temperature drops, from an enjoyable 61.7°F (16.5°C) in October, to a fresh 51.3°F (10.7°C). Weather in November »

The first month of the winter, December, is also a wintry month in Mystic, Connecticut, with average temperature varying between 33.4°F (0.8°C) and 42.3°F (5.7°C). In Mystic, the average high-temperature in December marginally drops, from a fresh 51.3°F (10.7°C) in November, to a cold 42.3°F (5.7°C). Weather in December »

What is the coldest month in Mystic?

The coldest month in Mystic, Connecticut, is January, with an average high-temperature of 36.5°F (2.5°C) and an average low-temperature of 26.6°F (-3°C).

What is the least humid month in Mystic?

January, March, April and November, with an average relative humidity of 74%, are the least humid months in Mystic.

How many days does it rain in Mystic?

In Mystic, during the entire year, the rain falls for 166.1 days and collects up to 34.09" (866mm) of precipitation.

When does it snow in Mystic?

Months with snowfall are January through April, October through December.

How many days does it snow in Mystic?

In Mystic, Connecticut, during the entire year, snow falls for 24.7 days, and aggregates up to 7.87" (200mm) of snow.

What are the months with the lowest UV index in Mystic?

Months with the lowest UV index in Mystic, Connecticut, are January through March and December, with an average maximum UV index of 2.

What is the month with the coldest ocean in Mystic?

With an average ocean temperature of 37.9°F (3.3°C), February is the month with the coldest seawater.

What is the month with the least sunshine in Mystic?

Months with the least sunshine are February and December, with an average of 4.9h of sunshine.

When does it snow the most in Mystic?

The month with the most snowfall in Mystic, Connecticut, is March when snow falls for 5.3 days and typically aggregates up to 2.44" (62mm) of snow.

When it does not snow in Mystic?

In Mystic, Connecticut, snow does not fall in May through September.

What is the most humid month in Mystic?

June is the most humid month, with an average relative humidity of 81%.

When are the longest days in Mystic?

With an average of 15.1h of daylight, June has the longest days of the year.

What is the month with the highest UV index in Mystic?

Months with the highest UV index are June through August, with an average maximum UV index of 6.

What is the warmest month in Mystic?

The warmest month in Mystic, Connecticut, is July, with an average high-temperature of 77.9°F (25.5°C) and an average low-temperature of 66.9°F (19.4°C).

When is the ocean warmest in Mystic?

With an average ocean temperature of 70.3°F (21.3°C), August is the month with the warmest seawater in Mystic, Connecticut.

What month has the most sunshine in Mystic?

The month with the most sunshine in Mystic is August, with an average of 10.6h of sunshine.

What is the driest month in Mystic?

September is the month with the least rainfall. Rain falls for 12.8 days and accumulates 1.73" (44mm) of precipitation.

What is the rainiest month in Mystic?

December is the month with the most rainfall in Mystic. Rain falls for 13.4 days and accumulates 3.86" (98mm) of precipitation.

What is the month with the shortest days in Mystic?

December has the shortest days of the year in Mystic, with an average of 9.2h of daylight.
Average temperature - Mystic, CT
Average humidity - Mystic, CT
Average rainfall - Mystic, CT

The wettest month (with the highest rainfall) is December (3.86").
The driest month (with the lowest rainfall) is September (1.73").

Average rainfall days - Mystic, CT

The month with the highest number of rainy days is July (17.1 days).
The month with the lowest number of rainy days is February (10.1 days).

Average snowfall - Mystic, CT
Average snowfall days - Mystic, CT

The month with the highest number of snowfall days is January (6.8 days).
Months with the lowest number of snowfall days are May, June, July, August and September (0 days).

Average sea temperature - Mystic, CT

The best month for swimming (with the highest average sea temperature) is August (70.3°F).
The coldest month (with the lowest average sea temperature) is February (37.9°F).

Average daylight / Average sunshine - Mystic, CT

The month with the longest days is June (Average daylight: 15.1h).
The month with shortest days is December (Average daylight: 9.2h).

The month with most sunshine is August (Average sunshine: 10.6h).
Months with least sunshine are February and December (Average sunshine: 4.9).

Average UV index - Mystic, CT