Climate and monthly weather forecast
New Haven, CT

The greeny New Haven Green in Connecticut, with the rest of the city and a far away dramatic landscape
The greeny New Haven Green in Connecticut, with the rest of the city and a far away dramatic landscape

Weather in January

January, like December, in New Haven, Connecticut, is a wintry winter month, with temperature in the range of an average high of 35.1°F (1.7°C) and an average low of 25.5°F (-3.6°C). January is the coldest month, with an average high-temperature of 35.1°F (1.7°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 New Haven, is another cold month, with temperature in the range of an average low of 26.6°F (-3°C) and an average high of 37.9°F (3.3°C). In February, the average high-temperature is almost 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 frosty month in New Haven, Connecticut, with temperature in the range of an average low of 33.1°F (0.6°C) and an average high of 43.9°F (6.6°C). In March, the average high-temperature slightly increases from a cold 37.9°F (3.3°C) in February to a chilly 43.9°F (6.6°C). Weather in March »

Weather in April

April is a fresh spring month in New Haven, Connecticut, with temperature in the range of an average high of 54.9°F (12.7°C) and an average low of 42.3°F (5.7°C). In April, the average high-temperature increases from a frosty 43.9°F (6.6°C) in March to a fresh 54.9°F (12.7°C). Weather in April »

Weather in May

The last month of the spring, May, is a comfortable month in New Haven, Connecticut, with an average temperature fluctuating between 65.1°F (18.4°C) and 51.4°F (10.8°C). In New Haven, the average high-temperature in May rises from a fresh 54.9°F (12.7°C) in April to an enjoyable 65.1°F (18.4°C). Weather in May »

Weather in June

The first month of the summer, June, is a warm month in New Haven, Connecticut, with an average temperature fluctuating between 60.4°F (15.8°C) and 73.9°F (23.3°C). In New Haven, the average high-temperature in June marginally rises from a comfortable 65.1°F (18.4°C) in May to a moderately hot 73.9°F (23.3°C). Weather in June »

Weather in July

July, the same as June, is another warm summer month in New Haven, Connecticut, with an average temperature varying between 80.4°F (26.9°C) and 67.6°F (19.8°C). With an average high-temperature of 80.4°F (26.9°C) and an average low-temperature of 67.6°F (19.8°C), July is the warmest month. Weather in July »

Weather in August

The last month of the summer, August, is another warm month in New Haven, Connecticut, with an average temperature fluctuating between 66.9°F (19.4°C) and 79.7°F (26.5°C). In August, the average high-temperature is almost the same as in July - a still moderately hot 79.7°F (26.5°C). Weather in August »

Weather in September

The first month of the autumn, September, is still a pleasant month in New Haven, Connecticut, with an average temperature ranging between min 60.3°F (15.7°C) and max 72.5°F (22.5°C). In September, the average high-temperature marginally drops from a warm 79.7°F (26.5°C) in August to a pleasant 72.5°F (22.5°C). Weather in September »

Weather in October

October, the same as September, is another comfortable autumn month in New Haven, Connecticut, with an average temperature fluctuating between 50.9°F (10.5°C) and 61.9°F (16.6°C). In October, the average high-temperature decreases from a pleasant 72.5°F (22.5°C) in September to a comfortable 61.9°F (16.6°C). Weather in October »

Weather in November

November, the last month of the autumn in New Haven, is another cool month, with temperature in the range of an average low of 40.1°F (4.5°C) and an average high of 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 fresh 50.7°F (10.4°C). Weather in November »

Weather in December

December, the first month of the winter in New Haven, is still a cold month, with an average temperature ranging between min 32.5°F (0.3°C) and max 41.7°F (5.4°C). In New Haven, the average high-temperature in December decreases from a cool 50.7°F (10.4°C) in November to a cold 41.7°F (5.4°C). Weather in December »
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FAQ

What is the coldest month in New Haven?

January is the coldest month, with an average high-temperature of 35.1°F (1.7°C) and an average low-temperature of 25.5°F (-3.6°C).

How many days does it rain in New Haven?

In New Haven, during the entire year, the rain falls for 167.2 days and collects up to 35.71" (907mm) of precipitation.

When does it snow in New Haven?

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

How many days does it snow in New Haven?

In New Haven, Connecticut, during the entire year, snow falls for 23.1 days and aggregates up to 9.21" (234mm) of snow.

What is the month with the lowest UV index in New Haven?

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

What is the most humid month in New Haven?

February, May and June, with an average relative humidity of 76%, are most humid months in New Haven.

When is the ocean coldest in New Haven?

The month with the coldest seawater in New Haven, Connecticut, is February, with an average ocean temperature of 38.5°F (3.6°C).

What is the month with the least sunshine in New Haven?

The month with the least sunshine in New Haven is February, with an average of 4.7h of sunshine.

What is the snowiest month in New Haven?

The month with the most snowfall in New Haven, Connecticut, is March, when snow falls for 4.8 days and typically aggregates up to 2.8" (71mm) of snow.

When is Daylight Saving Time (DST) in New Haven?

On Sunday, March 13. 2022, at 2:00 am, Daylight Saving Time starts in New Haven, Connecticut, 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.

What is the least humid month in New Haven?

April and November, with an average relative humidity of 72%, are the least humid months in New Haven, Connecticut.

When it does not snow in New Haven?

May through October are months without snowfall.

When are the longest days in New Haven?

June has the longest days of the year in New Haven, Connecticut, with an average of 15h and 7min of daylight.

What is the month with the highest UV index in New Haven?

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

What is the warmest month in New Haven?

July is the warmest month, with an average high-temperature of 80.4°F (26.9°C) and an average low-temperature of 67.6°F (19.8°C).

What month has the most sunshine in New Haven?

The month with the most sunshine in New Haven, Connecticut, is July, with an average of 10.6h of sunshine.

What is the month with the warmest ocean in New Haven?

The month with the warmest seawater is August, with an average ocean temperature of 73°F (22.8°C).

What is the driest month in New Haven?

The month with the least rainfall in New Haven is September, when the rain falls for 13.4 days and typically collects 2.24" (57mm) of precipitation.

What is the wettest month in New Haven?

December is the month with the most rainfall in New Haven. Rain falls for 12.5 days and accumulates 3.86" (98mm) of precipitation.

What is the month with the shortest days in New Haven?

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

Average temperature
New Haven, CT

Average temperature - New Haven, CT

The warmest month (with the highest average high temperature) is July (80.4°F).
The month with the lowest average high temperature is January (35.1°F).

The month with the highest average low temperature is July (67.6°F).
The coldest month (with the lowest average low temperature) is January (25.5°F).

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Average pressure
New Haven, CT

Average pressure - New Haven, CT

The month with the highest atmospheric pressure is November (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).

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Average wind speed
New Haven, CT

Average wind speed - New Haven, CT

The windiest month (with the highest average wind speed) is January (10.4mph).
The calmest months (with the lowest average wind speed) are July and August (6.8mph).

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Average humidity
New Haven, CT

Average humidity - New Haven, CT

The months with the highest relative humidity are February, May and June (76%).
The months with the lowest relative humidity are April and November (72%).

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Average rainfall
New Haven, CT

Average rainfall - New Haven, CT

The wettest month (with the highest rainfall) is December (3.86").
The driest month (with the least rainfall) is September (2.24").

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Average rainfall days
New Haven, CT

Average rainfall days - New Haven, CT

The month with the highest number of rainy days is July (18 days).
The month with the least rainy days is January (9.4 days).

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Average snowfall
New Haven, CT

Average snowfall - New Haven, CT

The month with the highest snowfall is March (2.8").
The months with the least snowfall are May, June, July, August, September and October (0").

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Average snowfall days
New Haven, CT

Average snowfall days - New Haven, CT

The month with the highest number of snowfall days is February (7.3 days).
The months with the least snowfall days are June, July, August and September (0 days).

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Average sea temperature
New Haven, CT

Average sea temperature - New Haven, CT

The best month for swimming (with the highest average sea temperature) is August (73°F).
The coldest month (with the lowest average sea temperature) is February (38.5°F).

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Average daylight / Average sunshine
New Haven, CT

Average daylight / Average sunshine - New Haven, 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 July (Average sunshine: 10h and 36min).
The month with the least sunshine is February (Average sunshine: 4h and 42min).

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Average sunshine days
New Haven, CT

Average sunshine days - New Haven, CT

The month with the most sunshine days is November (17.3 days).
The month with the least sunshine days is August (11.3 days).

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Average UV index
New Haven, CT

Average UV index - New Haven, 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
New Haven, CT

Average visibility - New Haven, 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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