Monthly weather forecast and climate
Greenwich, CT

The straight road of North Street cutting through the green leafy suburbs of the scenic Greenwich City in Connecticut
The straight road of North Street cutting through the green leafy suburbs of the scenic Greenwich City in Connecticut

Weather in January

January, like December, in Greenwich, Connecticut, is a wintry winter month, with average temperature varying between 26.1°F (-3.3°C) and 35.8°F (2.1°C). January is the coldest month, with an average high-temperature of 35.8°F (2.1°C) and an average low-temperature of 26.1°F (-3.3°C). Weather in January »

Weather in February

February, the last month of the winter, in Greenwich, is also a wintry month, with average temperature varying between 27.7°F (-2.4°C) and 38.3°F (3.5°C). In Greenwich, the average high-temperature in February is almost the same as in January - a still cold 38.3°F (3.5°C). Weather in February »

Weather in March

March, the first month of the spring, in Greenwich, is a frosty month, with average temperature varying between 45°F (7.2°C) and 33.8°F (1°C). In March, the average high-temperature slightly increases, from a cold 38.3°F (3.5°C) in February, to a frosty 45°F (7.2°C). Weather in March »

Weather in April

April in Greenwich, Connecticut, is a moderate spring month, with average temperature varying between 43.5°F (6.4°C) and 55.4°F (13°C). In April, the average high-temperature increases, from a frosty 45°F (7.2°C) in March, to a moderate 55.4°F (13°C). Weather in April »

Weather in May

May, the last month of the spring, in Greenwich, is a comfortable month, with temperature in the range of an average low of 53.1°F (11.7°C) and an average high of 66.2°F (19°C). In May, the average high-temperature rises, from a moderate 55.4°F (13°C) in April, to an enjoyable 66.2°F (19°C). Weather in May »

Weather in June

The first month of the summer, June, is a warm month in Greenwich, Connecticut, with average temperature ranging between min 61.5°F (16.4°C) and max 74.7°F (23.7°C). In Greenwich, the average high-temperature slightly increases, from a comfortable 66.2°F (19°C) in May, to a warm 74.7°F (23.7°C). Weather in June »

Weather in July

July, the same as June, is a moderately hot summer month in Greenwich, Connecticut, with average temperature ranging between max 82°F (27.8°C) and min 69.1°F (20.6°C). The warmest month is July, with an average high-temperature of 82°F (27.8°C) and an average low-temperature of 69.1°F (20.6°C). In July, the average heat index is evaluated at a hot 87.3°F (30.7°C). Weather in July »

Weather in August

August, the last month of the summer, in Greenwich, is also a moderately hot month, with average temperature ranging between min 68.7°F (20.4°C) and max 80.6°F (27°C). In Greenwich, Connecticut, the average high-temperature is almost the same as in July - a still warm 80.6°F (27°C). Weather in August »

Weather in September

September, the first month of the autumn, in Greenwich, is still a warm month, with average temperature varying between 61.7°F (16.5°C) and 73.4°F (23°C). In Greenwich, the average high-temperature marginally drops, from a warm 80.6°F (27°C) in August, to a still moderately hot 73.4°F (23°C). Weather in September »

Weather in October

October, like September, in Greenwich, Connecticut, is another enjoyable autumn month, with average temperature ranging between min 51.8°F (11°C) and max 62.4°F (16.9°C). In Greenwich, the average high-temperature drops, from a warm 73.4°F (23°C) in September, to a comfortable 62.4°F (16.9°C). Weather in October »

Weather in November

November, the last month of the autumn, in Greenwich, is another cool month, with average temperature ranging between min 40.6°F (4.8°C) and max 50.9°F (10.5°C). In November, the average high-temperature decreases, from a comfortable 62.4°F (16.9°C) in October, to a cool 50.9°F (10.5°C). Weather in November »

Weather in December

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

FAQ

What is the coldest month in Greenwich?

With an average high-temperature of 35.8°F (2.1°C) and an average low-temperature of 26.1°F (-3.3°C), January is the coldest month.

How much does it rain in Greenwich?

In Greenwich, Connecticut, during the entire year, the rain falls for 165.6 days and collects up to 37.64" (956mm) of precipitation.

What is the driest month in Greenwich?

January and February are months with the least rain in Greenwich when the rain falls for 7.9 days and typically aggregates up to 2.4" (61mm) of rain.

When does it snow in Greenwich?

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

How much does it snow in Greenwich?

In Greenwich, during the entire year, snow falls for 25.5 days, and aggregates up to 8.78" (223mm) of snow.

When is the lowest UV index in Greenwich?

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

What are the most humid months in Greenwich?

Months with the highest humidity in Greenwich are February, May and December, with an average relative humidity of 75%.

When does it snow the most in Greenwich?

The month with the most snowfall is February when snow falls for 7.1 days and typically aggregates up to 2.52" (64mm) of snow.

What month is the ocean coldest in Greenwich?

With an average ocean temperature of 39.4°F (4.1°C), February is the month with the coldest seawater in Greenwich, Connecticut.

What is the month with the least sunshine in Greenwich?

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

When it does not snow in Greenwich?

May through October are months without snowfall in Greenwich.

When are the longest days in Greenwich?

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

What is the month with the highest UV index in Greenwich?

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

What is the warmest month in Greenwich?

July is the warmest month, with an average high-temperature of 82°F (27.8°C) and an average low-temperature of 69.1°F (20.6°C).

What is the wettest month in Greenwich?

July is the month with the most rainfall in Greenwich, Connecticut. Rain falls for 18.1 days and accumulates 4.13" (105mm) of precipitation.

What month has the most sunshine in Greenwich?

July has the most sunshine of the year in Greenwich, Connecticut, with an average of 10.5h of sunshine.

What is the least humid month in Greenwich?

With an average relative humidity of 71%, August is the least humid month in Greenwich.

When is the ocean warmest in Greenwich?

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

What is the month with the shortest days in Greenwich?

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

Average temperature
Greenwich, CT

Average temperature - Greenwich, CT

The warmest month (with the highest average high temperature) is July (82°F).
The month with the lowest average high temperature is January (35.8°F).

The month with the highest average low temperature is July (69.1°F).
The coldest month (with the lowest average low temperature) is January (26.1°F).

[Resources]

Average pressure
Greenwich, CT

Average pressure - Greenwich, CT

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

[Resources]

Average wind speed
Greenwich, CT

Average wind speed - Greenwich, CT

The windiest month (with the highest average wind speed) is January (9.9mph).
The calmest month (with the lowest average wind speed) is July (6.5mph).

[Resources]

Average humidity
Greenwich, CT

Average humidity - Greenwich, CT

Months with the highest relative humidity are February, May and December (75%).
The month with the lowest relative humidity is August (71%).

[Resources]

Average rainfall
Greenwich, CT

Average rainfall - Greenwich, CT

The wettest month (with the highest rainfall) is July (4.13").
The driest months (with the least rainfall) are January and February (2.4").

[Resources]

Average rainfall days
Greenwich, CT

Average rainfall days - Greenwich, CT

The month with the highest number of rainy days is July (18.1 days).
The month with the least rainy days is January (7.9 days).

[Resources]

Average snowfall
Greenwich, CT

Average snowfall - Greenwich, CT

The month with the highest snowfall is February (2.52").
Months with the least snowfall are May, June, July, August, September and October (0").

[Resources]

Average snowfall days
Greenwich, CT

Average snowfall days - Greenwich, CT

The month with the highest number of snowfall days is January (7.2 days).
Months with the least snowfall days are June, July, August, September and October (0 days).

[Resources]

Average sea temperature
Greenwich, CT

Average sea temperature - Greenwich, CT

The best month for swimming (with the highest average sea temperature) is August (73.1°F).
The coldest month (with the lowest average sea temperature) is February (39.5°F).

[Resources]

Average daylight / Average sunshine
Greenwich, CT

Average daylight / Average sunshine - Greenwich, 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: 10.5h).
The month with the least sunshine is February (Average sunshine: 4.7h).

[Resources]

Average sunshine days
Greenwich, CT

Average sunshine days - Greenwich, CT

The month with the most sunshine days is November (17.8 days).
The month with the least sunshine days is June (10.7 days).

[Resources]

Average UV index
Greenwich, CT

Average UV index - Greenwich, 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).

[Resources]

Average visibility
Greenwich, CT

Average visibility - Greenwich, 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).

[Resources]