Climate and monthly weather forecast
Old Mystic, CT

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Weather in January

January, the same as December, is an icy winter month in Old Mystic, Connecticut, with an average temperature varying between 24.8°F (-4°C) and 35.4°F (1.9°C). The coldest period tends to be January, when average temperatures fluctuate between a high of 35.4°F (1.9°C) and a low of 24.8°F (-4°C). Weather in January »

Weather in February

The last month of the winter, February, is also a wintry month in Old Mystic, Connecticut, with an average temperature fluctuating between 25.3°F (-3.7°C) and 38.1°F (3.4°C). Entering February, Old Mystic's average high-temperature reads a still wintry 38.1°F (3.4°C), indicating a close resemblance to the previous month's climate. Weather in February »

Weather in March

The first month of the spring, March, is a chilly month in Old Mystic, Connecticut, with an average temperature ranging between max 44.2°F (6.8°C) and min 32.4°F (0.2°C). The start of March brings a subtle shift in the average high-temperature, edging up from February's cold 38.1°F (3.4°C) to a chilly 44.2°F (6.8°C). Weather in March »

Weather in April

April is a cool spring month in Old Mystic, Connecticut, with an average temperature fluctuating between 41°F (5°C) and 54.5°F (12.5°C). As March transitions into April, a change in temperatures is observed, with average highs moving from a chilly 44.2°F (6.8°C) to a cool 54.5°F (12.5°C). Weather in April »

Weather in May

May, the last month of the spring in Old Mystic, is an enjoyable month, with temperature in the range of an average high of 64.9°F (18.3°C) and an average low of 50.2°F (10.1°C). Old Mystic in May shows a temperature shift, moving from an average high of a fresh 54.5°F (12.5°C) in April to a refreshing 64.9°F (18.3°C). Weather in May »

Weather in June

The first month of the summer, June, is an agreeable month in Old Mystic, Connecticut, with an average temperature varying between 72.7°F (22.6°C) and 57.9°F (14.4°C). Entering June, Old Mystic notices a subtle temperature elevation, with the average high-temperature advancing from May's comfortable 64.9°F (18.3°C) to a pleasant 72.7°F (22.6°C). Weather in June »

Weather in July

July is a warm summer month in Old Mystic, Connecticut, with an average temperature fluctuating between 65.3°F (18.5°C) and 80.2°F (26.8°C). With average high temperatures of 80.2°F (26.8°C) and lows of 65.3°F (18.5°C), July is the warmest month. Weather in July »

Weather in August

The last month of the summer, August, is also a moderately hot month in Old Mystic, Connecticut, with an average temperature ranging between max 79.2°F (26.2°C) and min 64.4°F (18°C). During August, Old Mystic records an average high-temperature of a still moderately hot 79.2°F (26.2°C), marking a slight divergence from July's 80.2°F (26.8°C). Weather in August »

Weather in September

The first month of the autumn, September, is also an agreeable month in Old Mystic, Connecticut, with an average temperature varying between 58.1°F (14.5°C) and 72.5°F (22.5°C). The onset of September entails a subtle temperature shift, as the average high-temperature eases from a warm 79.2°F (26.2°C) in August to an agreeable 72.5°F (22.5°C). Weather in September »

Weather in October

October, like September, in Old Mystic, Connecticut, is another refreshing autumn month, with an average temperature fluctuating between 49.6°F (9.8°C) and 61.7°F (16.5°C). Transition into October marks a drop in the average high-temperature, moving from an agreeable 72.5°F (22.5°C) in September to a comfortable 61.7°F (16.5°C). Weather in October »

Weather in November

The last month of the autumn, November, is also a fresh month in Old Mystic, Connecticut, with temperature in the range of an average low of 38.7°F (3.7°C) and an average high of 50.9°F (10.5°C). November brings a decrease in the average high-temperature, falling from October's enjoyable 61.7°F (16.5°C) to a fresh 50.9°F (10.5°C). Weather in November »

Weather in December

December, the first month of the winter in Old Mystic, is also an icy month, with temperature in the range of an average high of 41.7°F (5.4°C) and an average low of 31.3°F (-0.4°C). December's onset brings a slight change in high-temperatures, falling from a fresh 50.9°F (10.5°C) in November to a cold 41.7°F (5.4°C). Weather in December »
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Frequently asked questions

What is the coldest month in Old Mystic?

Old Mystic experiences its average lowest temperatures in January, reaching a peak of 35.4°F (1.9°C) and a minimum of 24.8°F (-4°C).

How many days does it rain in Old Mystic?

In Old Mystic, Connecticut, during the entire year, the rain falls for 162.1 days and collects up to 33.66" (855mm) of precipitation.

When does it snow in Old Mystic?

Months with snowfall in Old Mystic, Connecticut, are January through May, November and December.

How many days does it snow in Old Mystic?

Throughout the year, there are 26.7 snowfall days, and 9.72" (247mm) of snow is accumulated.

When is the lowest UV index in Old Mystic?

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

What is the month with the least sunshine in Old Mystic?

February and December, with an average of 4.8h of sunshine, are months with the least sunshine in Old Mystic, Connecticut.

What is the snowiest month in Old Mystic?

March is the month with the most snowfall. Snow falls for 6.3 days and accumulates 2.56" (65mm) of snow.

When is Daylight Saving Time (DST) in Old Mystic?

On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Old Mystic, Connecticut, and the time zone changes from EST to EDT. Daylight Saving Time ends Sunday, November 3. 2024, at 2:00 am, and the time zone reverts from EDT to EST.

What is the least humid month in Old Mystic?

April is the least humid month, with an average relative humidity of 73%.

What are the most humid months in Old Mystic?

The months with the highest humidity are June and July, with an average relative humidity of 79%.

When it does not snow in Old Mystic?

In Old Mystic, snow does not fall in June through October.

When are the longest days in Old Mystic?

With an average of 15h and 6min of daylight, June has the longest days of the year.

What are the months with the highest UV index in Old Mystic?

June through August, with an average maximum UV index of 6, are months with the highest UV index in Old Mystic.

What time of the year is the hottest in Old Mystic?

In Old Mystic, Connecticut, the peak average temperatures are observed in July, with a high of 80.2°F (26.8°C) and a low of 65.3°F (18.5°C).

What month has the most sunshine in Old Mystic?

August has the most sunshine of the year, with an average of 10.4h of sunshine.

What is the driest month in Old Mystic?

The month with the least rainfall in Old Mystic is September, when the rain falls for 12.1 days and typically collects 1.61" (41mm) of precipitation.

What is the wettest month in Old Mystic?

December is the month with the most rainfall in Old Mystic. Rain falls for 12.3 days and accumulates 3.78" (96mm) of precipitation.

What is the month with the shortest days in Old Mystic?

December has the shortest days of the year, with an average of 9h and 12min of daylight.

Average temperature
Old Mystic, CT

Average temperature - Old Mystic, CT

The warmest month (with the highest average high temperature) is July (80.2°F).
The month with the lowest average high temperature is January (35.4°F).

The month with the highest average low temperature is July (65.3°F).
The coldest month (with the lowest average low temperature) is January (24.8°F).

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Average pressure
Old Mystic, CT

Average pressure - Old 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
Old Mystic, CT

Average wind speed - Old Mystic, CT

The windiest month (with the highest average wind speed) is January (10.6mph).
The calmest month (with the lowest average wind speed) is August (6.8mph).

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Average humidity
Old Mystic, CT

Average humidity - Old Mystic, CT

The months with the highest relative humidity are June and July (79%).
The month with the lowest relative humidity is April (73%).

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Average rainfall
Old Mystic, CT

Average rainfall - Old Mystic, CT

The wettest month (with the highest rainfall) is December (3.78").
The driest month (with the least rainfall) is September (1.61").

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Average rainfall days
Old Mystic, CT

Average rainfall days - Old Mystic, CT

The month with the highest number of rainy days is June (16.6 days).
The month with the least rainy days is January (10 days).

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Average snowfall
Old Mystic, CT

Average snowfall - Old Mystic, CT

The month with the highest snowfall is March (2.56").
The months with the least snowfall are June, July, August, September and October (0").

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Average snowfall days
Old Mystic, CT

Average snowfall days - Old Mystic, CT

The month with the highest number of snowfall days is January (7 days).
The months with the least snowfall days are June, July, August, September and October (0 days).

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Average daylight / Average sunshine
Old Mystic, CT

Average daylight / Average sunshine - Old Mystic, CT

The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 12min).

The month with the most sunshine is August (Average sunshine: 10h and 24min).
The months with the least sunshine are February and December (Average sunshine: 4h and 48min).

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Average sunshine days
Old Mystic, CT

Average sunshine days - Old Mystic, CT

The month with the most sunshine days is November (17.7 days).
The month with the least sunshine days is July (11.5 days).

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Average UV index
Old Mystic, CT

Average UV index - Old 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, November and December (UV index 2).

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Average visibility
Old Mystic, CT

Average visibility - Old 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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Old Mystic, Connecticut, USA

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