Climate and monthly weather forecast
Deep River, CT

Weather in January

January, like December, in Deep River, Connecticut, is a wintry winter month, with an average temperature varying between 35.2°F (1.8°C) and 25.5°F (-3.6°C). The coldest month is January, with an average high-temperature of 35.2°F (1.8°C) and an average low-temperature of 25.5°F (-3.6°C). Weather in January »

Weather in February

February, the last month of the winter in Deep River, is also a wintry month, with an average temperature fluctuating between 26.2°F (-3.2°C) and 37.9°F (3.3°C). In Deep River, the average high-temperature in February is essentially the same as in January - a still cold 37.9°F (3.3°C). Weather in February »

Weather in March

The first month of the spring, March, is a chilly month in Deep River, Connecticut, with an average temperature ranging between max 43.7°F (6.5°C) and min 32.5°F (0.3°C). In March, the average high-temperature slightly increases from a cold 37.9°F (3.3°C) in February to a chilly 43.7°F (6.5°C). Weather in March »

Weather in April

April in Deep River, Connecticut, is a cool spring month, with an average temperature fluctuating between 54.3°F (12.4°C) and 41.7°F (5.4°C). In Deep River, the average high-temperature in April rises from a chilly 43.7°F (6.5°C) in March to a cool 54.3°F (12.4°C). Weather in April »

Weather in May

The last month of the spring, May, is an enjoyable month in Deep River, Connecticut, with temperature in the range of an average low of 50.7°F (10.4°C) and an average high of 64.9°F (18.3°C). In May, the average high-temperature rises from a cool 54.3°F (12.4°C) in April to an enjoyable 64.9°F (18.3°C). Weather in May »

Weather in June

June, the first month of the summer in Deep River, is an agreeable month, with temperature in the range of an average low of 58.8°F (14.9°C) and an average high of 73°F (22.8°C). In Deep River, the average high-temperature in June slightly increases from an enjoyable 64.9°F (18.3°C) in May to an agreeable 73°F (22.8°C). Weather in June »

Weather in July

July is a moderately hot summer month in Deep River, Connecticut, with an average temperature fluctuating between 79.7°F (26.5°C) and 66.6°F (19.2°C). With an average high-temperature of 79.7°F (26.5°C) and an average low-temperature of 66.6°F (19.2°C), July is the warmest month. Weather in July »

Weather in August

August, the last month of the summer in Deep River, is another warm month, with temperature in the range of an average high of 78.6°F (25.9°C) and an average low of 65.7°F (18.7°C). In August, the average high-temperature is relatively the same as in July - a still warm 78.6°F (25.9°C). Weather in August »

Weather in September

September, the first month of the autumn in Deep River, is also an agreeable month, with an average temperature fluctuating between 72.3°F (22.4°C) and 59.5°F (15.3°C). In Deep River, Connecticut, the average high-temperature in September slightly decreases from a moderately hot 78.6°F (25.9°C) in August to an agreeable 72.3°F (22.4°C). Weather in September »

Weather in October

October, the same as September, is another enjoyable autumn month in Deep River, Connecticut, with an average temperature ranging between min 50.5°F (10.3°C) and max 61.9°F (16.6°C). In October, the average high-temperature decreases from a pleasant 72.3°F (22.4°C) in September to an enjoyable 61.9°F (16.6°C). Weather in October »

Weather in November

November, the last month of the autumn in Deep River, is another cool month, with an average temperature varying between 39.9°F (4.4°C) and 50.7°F (10.4°C). In November, the average high-temperature drops from a comfortable 61.9°F (16.6°C) in October to a cool 50.7°F (10.4°C). Weather in November »

Weather in December

December, the first month of the winter in Deep River, is still a cold month, with an average temperature ranging between max 41.9°F (5.5°C) and min 32.4°F (0.2°C). In Deep River, the average high-temperature in December marginally drops from a cool 50.7°F (10.4°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 Deep River?

The coldest month in Deep River is January, with an average high-temperature of 35.2°F (1.8°C) and an average low-temperature of 25.5°F (-3.6°C).

How many days does it rain in Deep River?

In Deep River, Connecticut, during the entire year, the rain falls for 166.2 days and collects up to 34.8" (884mm) of precipitation.

When does it snow in Deep River?

Months with snowfall in Deep River, Connecticut, are January through May, November and December.

How many days does it snow in Deep River?

Throughout the year, there are 24.2 snowfall days, and 9.53" (242mm) of snow is accumulated.

What are the months with the lowest UV index in Deep River?

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 Deep River?

The months with the least sunshine are February and December, with an average of 4.8h of sunshine.

What is the snowiest month in Deep River?

The month with the most snowfall is March, when snow falls for 4.7 days and typically aggregates up to 2.76" (70mm) of snow.

When is Daylight Saving Time (DST) in Deep River?

On Sunday, March 12. 2023, at 2:00 am, Daylight Saving Time starts, and the time zone changes from EST to EDT. Daylight Saving Time ends Sunday, November 5. 2023, at 2:00 am, and the time zone reverts from EDT to EST.

What is the least humid month in Deep River?

With an average relative humidity of 73%, April is the least humid month in Deep River, Connecticut.

What are the most humid months in Deep River?

May through July, with an average relative humidity of 78%, are most humid months.

When it does not snow in Deep River?

June through October are months without snowfall.

When are the longest days in Deep River?

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

What are the months with the highest UV index in Deep River?

June through August, with an average maximum UV index of 6, are months with the highest UV index in Deep River, Connecticut.

What is the warmest month in Deep River?

July is the warmest month in Deep River, Connecticut, with an average high-temperature of 79.7°F (26.5°C) and an average low-temperature of 66.6°F (19.2°C).

What month has the most sunshine in Deep River?

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

What is the driest month in Deep River?

The month with the least rainfall in Deep River, Connecticut, is September, when the rain falls for 13 days and typically collects 1.93" (49mm) of precipitation.

What is the rainiest month in Deep River?

December is the month with the most rainfall. Rain falls for 13 days and accumulates 3.66" (93mm) of precipitation.

What is the month with the shortest days in Deep River?

December has the shortest days of the year, with an average of 9h and 15min of daylight.

Average temperature
Deep River, CT

Average temperature - Deep River, CT

The warmest month (with the highest average high temperature) is July (79.7°F).
The month with the lowest average high temperature is January (35.2°F).

The month with the highest average low temperature is July (66.6°F).
The coldest month (with the lowest average low temperature) is January (25.5°F).

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Average pressure
Deep River, CT

Average pressure - Deep River, 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
Deep River, CT

Average wind speed - Deep River, CT

The windiest month (with the highest average wind speed) is January (10.9mph).
The calmest months (with the lowest average wind speed) are July and August (7.1mph).

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Average humidity
Deep River, CT

Average humidity - Deep River, CT

The months with the highest relative humidity are May, June and July (78%).
The month with the lowest relative humidity is April (73%).

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Average rainfall
Deep River, CT

Average rainfall - Deep River, CT

The wettest month (with the highest rainfall) is December (3.66").
The driest month (with the least rainfall) is September (1.93").

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Average rainfall days
Deep River, CT

Average rainfall days - Deep River, CT

The month with the highest number of rainy days is July (17 days).
The month with the least rainy days is January (9 days).

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Average snowfall
Deep River, CT

Average snowfall - Deep River, CT

The month with the highest snowfall is March (2.76").
The months with the least snowfall are June, July, August, September and October (0").

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Average snowfall days
Deep River, CT

Average snowfall days - Deep River, CT

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

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Average daylight / Average sunshine
Deep River, CT

Average daylight / Average sunshine - Deep River, 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 36min).
The months with the least sunshine are February and December (Average sunshine: 4h and 48min).

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Average sunshine days
Deep River, CT

Average sunshine days - Deep River, CT

The month with the most sunshine days is November (17.1 days).
The month with the least sunshine days is July (11.7 days).

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Average UV index
Deep River, CT

Average UV index - Deep River, 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
Deep River, CT

Average visibility - Deep River, 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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