Climate and monthly weather forecast
Mystic, CT

Weather in January

January, the same as December, is a wintry winter month in Mystic, Connecticut, with temperature in the range of an average low of 26.6°F (-3°C) and an average high of 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 »

Weather in February

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

Weather in March

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

Weather in April

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

Weather in May

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

Weather in June

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

Weather in July

July is a moderately hot summer month in Mystic, Connecticut, with an average temperature varying between 77.9°F (25.5°C) and 66.9°F (19.4°C). The warmest month 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). Weather in July »

Weather in August

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

Weather in September

September, the first month of the autumn in Mystic, is also an agreeable month, with an 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 an agreeable 71.4°F (21.9°C). Weather in September »

Weather in October

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

Weather in November

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

Weather in December

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

What is the coldest month in Mystic?

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.

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.

How much does it rain in Mystic?

Throughout the year, there are 166.1 rainfall days, and 34.09" (866mm) of precipitation is accumulated.

When does it snow in Mystic?

Months with snowfall in Mystic 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.

When is the lowest UV index in Mystic?

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

What month is the ocean coldest in Mystic?

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

What are the months with the least sunshine in Mystic?

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

What is the snowiest month in Mystic?

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

When is Daylight Saving Time (DST) in Mystic?

On Sunday, March 13. 2022, at 2:00 am, Daylight Saving Time starts in Mystic, and the time zone changes from EST to EDT. Daylight Saving Time ends Sunday, November 6. 2022, at 2:00 am, and the time zone reverts from EDT to EST.

When it does not snow in Mystic?

May through September are months without snowfall in Mystic, Connecticut.

What is the most humid month in Mystic?

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

When are the longest days in Mystic?

The month with the longest days is June, with an average of 15h and 7min of daylight.

When is the highest UV index in Mystic?

The 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?

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

What month 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.

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 wettest month in Mystic?

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

What is the month with the shortest days in Mystic?

The month with the shortest days in Mystic is December, with an average of 9h and 15min of daylight.

Average temperature
Mystic, CT

Average temperature - Mystic, CT

The warmest month (with the highest average high temperature) is July (77.9°F).
The month with the lowest average high temperature is January (36.5°F).

The month with the highest average low temperature is July (66.9°F).
The coldest month (with the lowest average low temperature) is January (26.6°F).

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Average pressure
Mystic, CT

Average pressure - Mystic, CT

The month with the highest atmospheric pressure is November (30.08"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).

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Average wind speed
Mystic, CT

Average wind speed - Mystic, CT

The windiest month (with the highest average wind speed) is January (12.4mph).
The calmest month (with the lowest average wind speed) is August (8.1mph).

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Average humidity
Mystic, CT

Average humidity - Mystic, CT

The month with the highest relative humidity is June (81%).
The months with the lowest relative humidity are January, March, April and November (74%).

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Average rainfall
Mystic, CT

Average rainfall - Mystic, CT

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

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Average rainfall days
Mystic, CT

Average rainfall days - Mystic, CT

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

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Average snowfall
Mystic, CT

Average snowfall - Mystic, CT

The month with the highest snowfall is March (2.44").
The months with the least snowfall are May, June, July, August and September (0").

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Average snowfall days
Mystic, CT

Average snowfall days - Mystic, CT

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

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Average sea temperature
Mystic, CT

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).

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Average daylight / Average sunshine
Mystic, CT

Average daylight / Average sunshine - Mystic, CT

The month with the longest days is June (Average daylight: 15h and 7min).
The month with the shortest days is December (Average daylight: 9h and 15min).

The month with the most sunshine is August (Average sunshine: 10h and 36min).
The months with the least sunshine are February and December (Average sunshine: 4h and 54min).

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Average sunshine days
Mystic, CT

Average sunshine days - Mystic, CT

The month with the most sunshine days is November (16.5 days).
The months with the least sunshine days are June and July (11.7 days).

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Average UV index
Mystic, CT

Average UV index - Mystic, CT

The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, March and December (UV index 2).

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Average visibility
Mystic, CT

Average visibility - Mystic, CT

The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

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