Old Greenwich
Connecticut, USA
Long-term weather forecast
Long-term weather forecast

Monthly weather forecast and climate
Old Greenwich, CT

January, like December, in Old Greenwich, Connecticut, is another cold winter month, with temperature in the range of an average low of 26.2°F (-3.2°C) and an average high of 36°F (2.2°C). January is the coldest month, with an average high-temperature of 36°F (2.2°C) and an average low-temperature of 26.2°F (-3.2°C). Weather in January »

February, the last month of the winter, in Old Greenwich, is another cold month, with average temperature ranging between min 27.7°F (-2.4°C) and max 38.5°F (3.6°C). In Old Greenwich, Connecticut, the average high-temperature in February is relatively the same as in January - a still cold 38.5°F (3.6°C). Weather in February »

March, the first month of the spring, in Old Greenwich, is a chilly month, with temperature in the range of an average low of 34.2°F (1.2°C) and an average high of 45°F (7.2°C). In March, the average high-temperature slightly increases, from a wintry 38.5°F (3.6°C) in February, to a frosty 45°F (7.2°C). Weather in March »

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

May, the last month of the spring, in Old Greenwich, is a comfortable month, with average temperature ranging between min 53.2°F (11.8°C) and max 65.8°F (18.8°C). In May, the average high-temperature rises, from a moderate 55.4°F (13°C) in April, to a comfortable 65.8°F (18.8°C). Weather in May »

The first month of the summer, June, is a warm month in Old Greenwich, Connecticut, with average temperature varying between 61.7°F (16.5°C) and 74.7°F (23.7°C). In June, the average high-temperature marginally rises, from a comfortable 65.8°F (18.8°C) in May, to a warm 74.7°F (23.7°C). Weather in June »

July, the same as June, is a moderately hot summer month in Old Greenwich, Connecticut, with average temperature varying between 81.9°F (27.7°C) and 69.3°F (20.7°C). The warmest month is July, with an average high-temperature of 81.9°F (27.7°C) and an average low-temperature of 69.3°F (20.7°C). The average heat index in July is appraised at a tropical 86.9°F (30.5°C). Weather in July »

August, the last month of the summer, in Old Greenwich, is another warm month, with temperature in the range of an average high of 80.4°F (26.9°C) and an average low of 68.9°F (20.5°C). In August, the average high-temperature is practically the same as in July - a still moderately hot 80.4°F (26.9°C). Weather in August »

September, the first month of the autumn, in Old Greenwich, is still a pleasant month, with average temperature fluctuating between 61.7°F (16.5°C) and 73.2°F (22.9°C). In September, the average high-temperature slightly decreases, from a moderately hot 80.4°F (26.9°C) in August, to an agreeable 73.2°F (22.9°C). Weather in September »

October, like September, in Old Greenwich, Connecticut, is another comfortable autumn month, with average temperature fluctuating between 62.4°F (16.9°C) and 52°F (11.1°C). In October, the average high-temperature decreases, from an agreeable 73.2°F (22.9°C) in September, to a comfortable 62.4°F (16.9°C). Weather in October »

The last month of the autumn, November, is also a fresh month in Old Greenwich, Connecticut, with average temperature fluctuating between 50.9°F (10.5°C) and 40.8°F (4.9°C). In November, the average high-temperature drops, from a comfortable 62.4°F (16.9°C) in October, to a cool 50.9°F (10.5°C). Weather in November »

December, the first month of the winter, in Old Greenwich, is still a cold month, with temperature in the range of an average high of 41.9°F (5.5°C) and an average low of 33.4°F (0.8°C). In Old Greenwich, the average high-temperature drops, from a cool 50.9°F (10.5°C) in November, to a wintry 41.9°F (5.5°C). Weather in December »

What is the coldest month in Old Greenwich?

January is the coldest month in Old Greenwich, Connecticut, with an average high-temperature of 36°F (2.2°C) and an average low-temperature of 26.2°F (-3.2°C).

How much does it rain in Old Greenwich?

Throughout the year, in Old Greenwich, there are 166.6 rainfall days, and 38.07" (967mm) of precipitation is accumulated.

What is the driest month in Old Greenwich?

January is the month with the least rainfall in Old Greenwich, Connecticut. Rain falls for 8.6 days and accumulates 2.44" (62mm) of precipitation.

When does it snow in Old Greenwich?

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

How much does it snow in Old Greenwich?

In Old Greenwich, during the entire year, snow falls for 24.8 days, and aggregates up to 9.33" (237mm) of snow.

What is the month with the lowest UV index in Old Greenwich?

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

What are the most humid months in Old Greenwich?

February, May, June and December, with an average relative humidity of 75%, are most humid months.

What is the snowiest month in Old Greenwich?

February is the month with the most snowfall. Snow falls for 7.3 days and accumulates 2.6" (66mm) of snow.

When is the ocean coldest in Old Greenwich?

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

What is the month with the least sunshine in Old Greenwich?

February and December, with an average of 4.7h of sunshine, are months with the least sunshine in Old Greenwich.

When it does not snow in Old Greenwich?

May through October are months without snowfall.

When are the longest days in Old Greenwich?

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 Old Greenwich?

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

What is the warmest month in Old Greenwich?

July is the warmest month, with an average high-temperature of 81.9°F (27.7°C) and an average low-temperature of 69.3°F (20.7°C).

What is the wettest month in Old Greenwich?

July is the month with the most rainfall. Rain falls for 17.8 days and accumulates 4.13" (105mm) of precipitation.

What month has the most sunshine in Old Greenwich?

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

What is the least humid month in Old Greenwich?

The least humid month in Old Greenwich, Connecticut, is August, with an average relative humidity of 71%.

When is the ocean warmest in Old Greenwich?

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

What is the month with the shortest days in Old Greenwich?

With an average of 9.3h of daylight, December has the shortest days of the year.
Average temperature - Old Greenwich, CT
Average humidity - Old Greenwich, CT
Average rainfall - Old Greenwich, CT

The wettest month (with the highest rainfall) is July (4.13").
The driest month (with the lowest rainfall) is January (2.44").

Average rainfall days - Old Greenwich, CT

The month with the highest number of rainy days is July (17.8 days).
The month with the lowest number of rainy days is January (8.6 days).

Average snowfall - Old Greenwich, CT

The month with the highest snowfall is February (2.6").
Months with the lowest snowfall are May, June, July, August, September and October (0").

Average snowfall days - Old Greenwich, CT

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

Average sea temperature - Old 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).

Average daylight / Average sunshine - Old Greenwich, CT

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

The month with most sunshine is July (Average sunshine: 10.5h).
Months with least sunshine are February and December (Average sunshine: 4.7).

Average UV index - Old Greenwich, CT