Monthly weather forecast and climate
Darien, CT

Weather in January

January, like December, in Darien, Connecticut, is a wintry winter month, with temperature in the range of an average high of 36.1°F (2.3°C) and an average low of 26.4°F (-3.1°C). With an average high-temperature of 36.1°F (2.3°C) and an average low-temperature of 26.4°F (-3.1°C), January is the coldest month. Weather in January »

Weather in February

The last month of the winter, February, is another cold month in Darien, Connecticut, with average temperature ranging between max 38.3°F (3.5°C) and min 27.9°F (-2.3°C). In Darien, the average high-temperature is relatively the same as in January - a still cold 38.3°F (3.5°C). Weather in February »

Weather in March

The first month of the spring, March, is a chilly month in Darien, Connecticut, with temperature in the range of an average high of 44.6°F (7°C) and an average low of 34.2°F (1.2°C). In March, the average high-temperature marginally rises, from a cold 38.3°F (3.5°C) in February, to a frosty 44.6°F (7°C). Weather in March »

Weather in April

April in Darien, Connecticut, is a moderate spring month, with average temperature fluctuating between 43.3°F (6.3°C) and 55.4°F (13°C). In April, the average high-temperature rises, from a frosty 44.6°F (7°C) in March, to a moderate 55.4°F (13°C). Weather in April »

Weather in May

The last month of the spring, May, is an enjoyable month in Darien, Connecticut, with average temperature varying between 53.1°F (11.7°C) and 65.8°F (18.8°C). In Darien, the average high-temperature increases, from a mild 55.4°F (13°C) in April, to an enjoyable 65.8°F (18.8°C). Weather in May »

Weather in June

The first month of the summer, June, is a warm month in Darien, Connecticut, with average temperature ranging between max 74.1°F (23.4°C) and min 61.3°F (16.3°C). In Darien, the average high-temperature slightly increases, from a comfortable 65.8°F (18.8°C) in May, to a warm 74.1°F (23.4°C). Weather in June »

Weather in July

July, like June, in Darien, Connecticut, is another warm summer month, with temperature in the range of an average low of 68.9°F (20.5°C) and an average high of 81.3°F (27.4°C). July is the warmest month, with an average high-temperature of 81.3°F (27.4°C) and an average low-temperature of 68.9°F (20.5°C). In July, the average heat index is calculated to 86°F (30°C). Weather in July »

Weather in August

The last month of the summer, August, is also a moderately hot month in Darien, Connecticut, with average temperature ranging between max 80.4°F (26.9°C) and min 68.5°F (20.3°C). In Darien, the average high-temperature is almost the same as in July - a still moderately hot 80.4°F (26.9°C). Weather in August »

Weather in September

September, the first month of the autumn, in Darien, is still a pleasant month, with average temperature ranging between max 73.2°F (22.9°C) and min 62.1°F (16.7°C). In September, the average high-temperature slightly decreases, from a moderately hot 80.4°F (26.9°C) in August, to a pleasant 73.2°F (22.9°C). Weather in September »

Weather in October

October, like September, in Darien, Connecticut, is another enjoyable autumn month, with average temperature varying between 52.3°F (11.3°C) and 62.2°F (16.8°C). In October, the average high-temperature decreases, from a pleasant 73.2°F (22.9°C) in September, to a comfortable 62.2°F (16.8°C). Weather in October »

Weather in November

November, the last month of the autumn, in Darien, is another cool month, with average temperature ranging between max 50.9°F (10.5°C) and min 40.8°F (4.9°C). In Darien, the average high-temperature decreases, from a comfortable 62.2°F (16.8°C) in October, to a cool 50.9°F (10.5°C). Weather in November »

Weather in December

The first month of the winter, December, is still a cold month in Darien, Connecticut, with average temperature ranging between min 33.3°F (0.7°C) and max 41.9°F (5.5°C). In Darien, the average high-temperature in December drops, from a fresh 50.9°F (10.5°C) in November, to a cold 41.9°F (5.5°C). Weather in December »
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FAQ

What is the coldest month in Darien?

The coldest month in Darien is January, with an average high-temperature of 36.1°F (2.3°C) and an average low-temperature of 26.4°F (-3.1°C).

How many days does it rain in Darien?

Throughout the year, in Darien, Connecticut, there are 166.4 rainfall days, and 38.7" (983mm) of precipitation is accumulated.

What is the driest month in Darien?

January is the month with the least rainfall in Darien. Rain falls for 8.8 days and accumulates 2.48" (63mm) of precipitation.

When does it snow in Darien?

January through April, November and December are months with snowfall in Darien.

How much does it snow in Darien?

In Darien, during the entire year, snow falls for 25.7 days, and aggregates up to 9.09" (231mm) of snow.

What is the month with the lowest UV index in Darien?

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

What is the snowiest month in Darien?

The month with the most snowfall is February when snow falls for 7.8 days and typically aggregates up to 2.64" (67mm) of snow.

What is the month with the least sunshine in Darien?

The month with the least sunshine is February, with an average of 4.6h of sunshine.

What is the least humid month in Darien?

Months with the lowest humidity are April, August and November, with an average relative humidity of 72%.

What is the most humid month in Darien?

The most humid month in Darien, Connecticut, is May, with an average relative humidity of 76%.

When it does not snow in Darien?

In Darien snow does not fall in May through October.

When are the longest days in Darien?

June has the longest days of the year in Darien, Connecticut, with an average of 15.1h of daylight.

When is the highest UV index in Darien?

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

What is the warmest month in Darien?

With an average high-temperature of 81.3°F (27.4°C) and an average low-temperature of 68.9°F (20.5°C), July is the warmest month.

What is the rainiest month in Darien?

Months with the most rainfall in Darien, Connecticut, are July and December, with an average 4.17" (106mm) of precipitation.

What month has the most sunshine in Darien?

The month with the most sunshine in Darien, Connecticut, is July, with an average of 10.4h of sunshine.

What is the month with the shortest days in Darien?

December has the shortest days of the year, with an average of 9.3h of daylight.

Average temperature
Darien, CT

Average temperature - Darien, CT

The warmest month (with the highest average high temperature) is July (81.3°F).
The month with the lowest average high temperature is January (36.1°F).

The month with the highest average low temperature is July (68.9°F).
The coldest month (with the lowest average low temperature) is January (26.4°F).

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Average pressure
Darien, CT

Average pressure - Darien, CT

The month with the highest atmospheric pressure is November (30.1").
The month with the lowest atmospheric pressure is June (29.93").

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Average wind speed
Darien, CT

Average wind speed - Darien, CT

The windiest month (with the highest average wind speed) is January (10.3mph).
The calmest month (with the lowest average wind speed) is July (6.6mph).

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Average humidity
Darien, CT

Average humidity - Darien, CT

The month with the highest relative humidity is May (76%).
Months with the lowest relative humidity are April, August and November (72%).

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Average rainfall
Darien, CT

Average rainfall - Darien, CT

The wettest months (with the highest rainfall) are July and December (4.17").
The driest month (with the least rainfall) is January (2.48").

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Average rainfall days
Darien, CT

Average rainfall days - Darien, CT

The month with the highest number of rainy days is May (17.3 days).
The month with the least rainy days is January (8.8 days).

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Average snowfall
Darien, CT

Average snowfall - Darien, CT

The month with the highest snowfall is February (2.64").
Months with the least snowfall are May, June, July, August, September and October (0").

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Average snowfall days
Darien, CT

Average snowfall days - Darien, CT

The month with the highest number of snowfall days is February (7.8 days).
Months with the least snowfall days are June, July, August and September (0 days).

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Average daylight / Average sunshine
Darien, CT

Average daylight / Average sunshine - Darien, CT

The month with the longest days is June (Average daylight: 15.1h).
The month with the shortest days is December (Average daylight: 9.3h).

The month with the most sunshine is July (Average sunshine: 10.4h).
The month with the least sunshine is February (Average sunshine: 4.6h).

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Average sunshine days
Darien, CT

Average sunshine days - Darien, CT

The month with the most sunshine days is November (17.3 days).
The month with the least sunshine days is June (10.8 days).

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Average UV index
Darien, CT

Average UV index - Darien, CT

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

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Average visibility
Darien, CT

Average visibility - Darien, CT

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

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