New Haven
Connecticut, USA
Long-term weather forecast
Long-term weather forecast

Monthly weather forecast and climate
New Haven, CT

A scenic shot from above of the greeny New Haven Green in Connecticut, with the rest of the city and a far away dramatic landscape
A scenic shot from above of the greeny New Haven Green in Connecticut, with the rest of the city and a far away dramatic landscape
January, the same as December, is another cold winter month in New Haven, Connecticut, with average temperature ranging between min 25.5°F (-3.6°C) and max 35.1°F (1.7°C). The coldest month is January, 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 »

The last month of the winter, February, is also a wintry month in New Haven, Connecticut, with average temperature varying between 37.9°F (3.3°C) and 26.6°F (-3°C). In New Haven, the average high-temperature in February is essentially the same as in January - a still wintry 37.9°F (3.3°C). Weather in February »

March, the first month of the spring, in New Haven, is a frosty month, with temperature in the range of an average high of 43.9°F (6.6°C) and an average low of 33.1°F (0.6°C). In March, the average high-temperature slightly increases, from a cold 37.9°F (3.3°C) in February, to a frosty 43.9°F (6.6°C). Weather in March »

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

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

The first month of the summer, June, is a warm month in New Haven, Connecticut, with average temperature fluctuating between 73.9°F (23.3°C) and 60.4°F (15.8°C). In June, the average high-temperature 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 »

July, like June, in New Haven, Connecticut, is another warm summer month, with average temperature varying between 80.4°F (26.9°C) and 67.6°F (19.8°C). 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). Weather in July »

August, the last month of the summer, in New Haven, is also a moderately hot month, with temperature in the range of an average low of 66.9°F (19.4°C) and an average high of 79.7°F (26.5°C). In New Haven, the average high-temperature in August is practically the same as in July - a still moderately hot 79.7°F (26.5°C). Weather in August »

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

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

The last month of the autumn, November, is also a fresh month in New Haven, Connecticut, with average temperature ranging between max 50.7°F (10.4°C) and min 40.1°F (4.5°C). In November, the average high-temperature decreases, from a comfortable 61.9°F (16.6°C) in October, to a fresh 50.7°F (10.4°C). Weather in November »

The first month of the winter, December, is still a cold month in New Haven, Connecticut, with 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 drops, from a cool 50.7°F (10.4°C) in November, to a cold 41.7°F (5.4°C). Weather in December »

What is the coldest month in New Haven?

January is the coldest month in New Haven, Connecticut, 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?

Throughout the year, in New Haven, there are 167.2 rainfall days, and 35.71" (907mm) of precipitation is accumulated.

When does it snow in New Haven?

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

How many days does it snow in New Haven?

Throughout the year, in New Haven, there are 23.1 snowfall days, and 9.21" (234mm) of snow is accumulated.

When is 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?

Months with the highest humidity are February, May and June, with an average relative humidity of 76%.

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

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

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

With an average of 4.7h of sunshine, February has the least sunshine of the year.

When does it snow the most in New Haven?

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

What is the least humid month in New Haven?

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

When it does not snow in New Haven?

May through October are months without snowfall.

When are the longest days in New Haven?

The month with the longest days is June, with an average of 15.1h of daylight.

What are the months with the highest UV index in New Haven?

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

What is the warmest month in New Haven?

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.

What month has the most sunshine in New Haven?

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

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

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

What is the driest month in New Haven?

September is the month with the least rainfall in New Haven. Rain falls for 13.4 days and accumulates 2.24" (57mm) of precipitation.

What is the wettest month in New Haven?

The month with the most rainfall is December when the rain falls for 12.5 days and typically aggregates up to 3.86" (98mm) of precipitation.

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

With an average of 9.2h of daylight, December has the shortest days of the year in New Haven, Connecticut.
Average temperature - New Haven, CT
Average humidity - New Haven, CT
Average rainfall - New Haven, CT

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

Average rainfall days - New Haven, CT

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

Average snowfall - New Haven, CT
Average snowfall days - New Haven, CT

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

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).

Average daylight / Average sunshine - New Haven, CT
Average UV index - New Haven, CT