Cornwall
Connecticut, USA
Long-term weather forecast
Long-term weather forecast

Monthly weather forecast and climate
Cornwall, CT

January, the same as December, in Cornwall, Connecticut, is another subzero cold winter month, with temperature in the range of an average low of 18.9°F (-7.3°C) and an average high of 30.9°F (-0.6°C). With an average high-temperature of 30.9°F (-0.6°C) and an average low-temperature of 18.9°F (-7.3°C), January is the coldest month. Weather in January »

February, the last month of the winter, in Cornwall, is a cold month, with average temperature ranging between min 19.8°F (-6.8°C) and max 34.3°F (1.3°C). In Cornwall, the average high-temperature in February is essentially the same as in January - a cold 34.3°F (1.3°C). Weather in February »

March, the first month of the spring, in Cornwall, is still a cold month, with average temperature varying between 42.3°F (5.7°C) and 27.5°F (-2.5°C). In March, the average high-temperature slightly increases, from 34.3°F (1.3°C) in February, to a still cold 42.3°F (5.7°C). Weather in March »

April in Cornwall, Connecticut, is a cool spring month, with average temperature varying between 37.6°F (3.1°C) and 55.2°F (12.9°C). In April, the average high-temperature rises, from a cold 42.3°F (5.7°C) in March, to a cool 55.2°F (12.9°C). Weather in April »

May, the last month of the spring, in Cornwall, is an enjoyable month, with temperature in the range of an average low of 47.7°F (8.7°C) and an average high of 67.5°F (19.7°C). In Cornwall, the average high-temperature in May rises, from a cool 55.2°F (12.9°C) in April, to an enjoyable 67.5°F (19.7°C). Weather in May »

The first month of the summer, June, is a moderately hot month in Cornwall, Connecticut, with average temperature varying between 54.9°F (12.7°C) and 74.8°F (23.8°C). In June, the average high-temperature marginally rises, from a comfortable 67.5°F (19.7°C) in May, to a warm 74.8°F (23.8°C). Weather in June »

July, the same as June, is a moderately hot summer month in Cornwall, Connecticut, with temperature in the range of an average low of 61.3°F (16.3°C) and an average high of 81.1°F (27.3°C). The warmest month is July, with an average high-temperature of 81.1°F (27.3°C) and an average low-temperature of 61.3°F (16.3°C). The average heat index in July is estimated at a hot 86.2°F (30.1°C). Weather in July »

August, the last month of the summer, in Cornwall, is another warm month, with temperature in the range of an average low of 59.4°F (15.2°C) and an average high of 79.2°F (26.2°C). In August, the average high-temperature is practically the same as in July - a still warm 79.2°F (26.2°C). Weather in August »

The first month of the autumn, September, is still a pleasant month in Cornwall, Connecticut, with temperature in the range of an average low of 53.4°F (11.9°C) and an average high of 72°F (22.2°C). In September, the average high-temperature slightly decreases, from a moderately hot 79.2°F (26.2°C) in August, to an agreeable 72°F (22.2°C). Weather in September »

October, the same as September, in Cornwall, Connecticut, is another mild autumn month, with average temperature fluctuating between 44.1°F (6.7°C) and 59°F (15°C). In October, the average high-temperature decreases, from a pleasant 72°F (22.2°C) in September, to a mild 59°F (15°C). Weather in October »

November, the last month of the autumn, in Cornwall, is another chilly month, with average temperature fluctuating between 33.3°F (0.7°C) and 46.6°F (8.1°C). In Cornwall, the average high-temperature drops, from a moderate 59°F (15°C) in October, to a chilly 46.6°F (8.1°C). Weather in November »

December, the first month of the winter, in Cornwall, is also a wintry month, with temperature in the range of an average low of 25.7°F (-3.5°C) and an average high of 36.7°F (2.6°C). In December, the average high-temperature decreases, from a chilly 46.6°F (8.1°C) in November, to a cold 36.7°F (2.6°C). Weather in December »

What is the coldest month in Cornwall?

January is the coldest month in Cornwall, with an average high-temperature of 30.9°F (-0.6°C) and an average low-temperature of 18.9°F (-7.3°C).

How many days does it rain in Cornwall?

Throughout the year, in Cornwall, there are 160.5 rainfall days, and 33.86" (860mm) of precipitation is accumulated.

What is the driest month in Cornwall?

January is the month with the least rainfall. Rain falls for 7.7 days and accumulates 2.17" (55mm) of precipitation.

When does it snow in Cornwall?

Months with snowfall in Cornwall are January through May, October through December.

How much does it snow in Cornwall?

In Cornwall, Connecticut, during the entire year, snow falls for 40.2 days, and aggregates up to 20.39" (518mm) of snow.

What are the months with the lowest UV index in Cornwall?

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

What is the most humid month in Cornwall?

The most humid month in Cornwall is February, with an average relative humidity of 82%.

What is the snowiest month in Cornwall?

February is the month with the most snowfall in Cornwall. Snow falls for 10.3 days and accumulates 5.16" (131mm) of snow.

What is the month with the least sunshine in Cornwall?

The month with the least sunshine in Cornwall is February, with an average of 4.2h of sunshine.

What is the least humid month in Cornwall?

The least humid month is April, with an average relative humidity of 74%.

When it does not snow in Cornwall?

June through September are months without snowfall in Cornwall.

When are the longest days in Cornwall?

With an average of 15.2h of daylight, June has the longest days of the year.

When is the highest UV index in Cornwall?

June is the month with the highest UV index, with an average maximum UV index of 6.

What is the warmest month in Cornwall?

The warmest month in Cornwall is July, with an average high-temperature of 81.1°F (27.3°C) and an average low-temperature of 61.3°F (16.3°C).

What is the wettest month in Cornwall?

The month with the most rainfall is July when the rain falls for 17.9 days and typically aggregates up to 3.54" (90mm) of precipitation.

What month has the most sunshine in Cornwall?

July has the most sunshine of the year in Cornwall, with an average of 10.1h of sunshine.

What is the month with the shortest days in Cornwall?

The month with the shortest days in Cornwall, Connecticut, is December, with an average of 9.2h of daylight.
Average temperature - Cornwall, CT
Average rainfall - Cornwall, CT
Average rainfall days - Cornwall, CT

The month with the highest number of rainy days is July (17.9 days).
The month with the least rainy days is January (7.7 days).

Average snowfall - Cornwall, CT
Average snowfall days - Cornwall, CT

The month with the highest number of snowfall days is February (10.3 days).
Months with the least snowfall days are June, July, August and September (0 days).

Average daylight / Average sunshine - Cornwall, CT

The month with the longest days is June (Average daylight: 15.2h).
The month with the shortest days is December (Average daylight: 9.2h).

The month with the most sunshine is July (Average sunshine: 10.1h).
The month with the least sunshine is February (Average sunshine: 4.2h).

Average UV index - Cornwall, CT