Monthly weather forecast and climate
Haddam, CT

Weather in January

January, like December, in Haddam, Connecticut, is a wintry winter month, with average temperature varying between 22.8°F (-5.1°C) and 34.7°F (1.5°C). The coldest month is January, with an average high-temperature of 34.7°F (1.5°C) and an average low-temperature of 22.8°F (-5.1°C). Weather in January »

Weather in February

February, the last month of the winter, in Haddam, is also a wintry month, with average temperature ranging between max 37.8°F (3.2°C) and min 23.4°F (-4.8°C). In Haddam, the average high-temperature in February is relatively the same as in January - a still cold 37.8°F (3.2°C). Weather in February »

Weather in March

The first month of the spring, March, is a chilly month in Haddam, Connecticut, with average temperature fluctuating between 30.6°F (-0.8°C) and 45°F (7.2°C). In March, the average high-temperature slightly increases, from a cold 37.8°F (3.2°C) in February, to a chilly 45°F (7.2°C). Weather in March »

Weather in April

April is a mild spring month in Haddam, Connecticut, with temperature in the range of an average high of 56.7°F (13.7°C) and an average low of 40.3°F (4.6°C). In Haddam, the average high-temperature rises, from a chilly 45°F (7.2°C) in March, to a mild 56.7°F (13.7°C). Weather in April »

Weather in May

The last month of the spring, May, is a pleasant month in Haddam, Connecticut, with average temperature fluctuating between 49.5°F (9.7°C) and 68°F (20°C). In Haddam, the average high-temperature rises, from a moderate 56.7°F (13.7°C) in April, to a pleasant 68°F (20°C). Weather in May »

Weather in June

June, the first month of the summer, in Haddam, is a warm month, with average temperature ranging between min 57.2°F (14°C) and max 75.7°F (24.3°C). In Haddam, the average high-temperature marginally rises, from an agreeable 68°F (20°C) in May, to a moderately hot 75.7°F (24.3°C). Weather in June »

Weather in July

July, the same as June, is a moderately hot summer month in Haddam, Connecticut, with average temperature ranging between max 82.6°F (28.1°C) and min 63.9°F (17.7°C). With an average high-temperature of 82.6°F (28.1°C) and an average low-temperature of 63.9°F (17.7°C), July is the warmest month. In July, the average heat index is estimated at a tropical 89.4°F (31.9°C). Weather in July »

Weather in August

The last month of the summer, August, is another warm month in Haddam, Connecticut, with average temperature varying between 80.4°F (26.9°C) and 62.8°F (17.1°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 »

Weather in September

September, the first month of the autumn, in Haddam, is still a warm month, with average temperature varying between 73.4°F (23°C) and 56.7°F (13.7°C). In Haddam, Connecticut, the average high-temperature marginally drops, from 80.4°F (26.9°C) in August, to a still warm 73.4°F (23°C). Weather in September »

Weather in October

October, the same as September, is another enjoyable autumn month in Haddam, Connecticut, with average temperature varying between 48°F (8.9°C) and 61.7°F (16.5°C). In Haddam, the average high-temperature in October drops, from a warm 73.4°F (23°C) in September, to a comfortable 61.7°F (16.5°C). Weather in October »

Weather in November

November, the last month of the autumn, in Haddam, is also a fresh month, with average temperature varying between 50°F (10°C) and 37.6°F (3.1°C). In Haddam, the average high-temperature drops, from an enjoyable 61.7°F (16.5°C) in October, to a fresh 50°F (10°C). Weather in November »

Weather in December

December, the first month of the winter, in Haddam, is also a wintry month, with average temperature ranging between max 40.6°F (4.8°C) and min 30°F (-1.1°C). In December, the average high-temperature decreases, from a fresh 50°F (10°C) in November, to a wintry 40.6°F (4.8°C). Weather in December »
[Resources]

FAQ

What is the coldest month in Haddam?

With an average high-temperature of 34.7°F (1.5°C) and an average low-temperature of 22.8°F (-5.1°C), January is the coldest month.

How much does it rain in Haddam?

In Haddam, Connecticut, during the entire year, the rain falls for 109.9 days and collects up to 11.14" (283mm) of precipitation.

When does it snow in Haddam?

January through May, November and December are months with snowfall in Haddam, Connecticut.

How many days does it snow in Haddam?

Throughout the year, in Haddam, Connecticut, there are 19.9 snowfall days, and 3.7" (94mm) of snow is accumulated.

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

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

What is the most humid month in Haddam?

The most humid month in Haddam is February, with an average relative humidity of 78%.

What is the month with the least sunshine in Haddam?

The month with the least sunshine in Haddam, Connecticut, is February, with an average of 4.5h of sunshine.

What is the snowiest month in Haddam?

March is the month with the most snowfall in Haddam, Connecticut. Snow falls for 4.9 days and accumulates 1.14" (29mm) of snow.

What is the least humid month in Haddam?

With an average relative humidity of 72%, April is the least humid month in Haddam, Connecticut.

When it does not snow in Haddam?

June through October are months without snowfall in Haddam.

When are the longest days in Haddam?

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

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

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

What is the warmest month in Haddam?

The warmest month is July, with an average high-temperature of 82.6°F (28.1°C) and an average low-temperature of 63.9°F (17.7°C).

What is the wettest month in Haddam?

The month with the most rainfall in Haddam, Connecticut, is July when the rain falls for 12.7 days and typically aggregates up to 1.18" (30mm) of precipitation.

What is the month with the most sunshine in Haddam?

Months with the most sunshine in Haddam are July and August, with an average of 10.1h of sunshine.

What is the driest month in Haddam?

The month with the least rainfall in Haddam, Connecticut, is September when the rain falls for 8.5 days and typically collects 0.39" (10mm) of precipitation.

What is the month with the shortest days in Haddam?

With an average of 9.2h of daylight, December has the shortest days of the year.

Average pressure
Haddam, CT

Average pressure - Haddam, CT

The month with the highest atmospheric pressure is November (30.08").
The month with the lowest atmospheric pressure is June (29.93").

[Resources]

Average wind speed
Haddam, CT

Average wind speed - Haddam, CT

The windiest months (with the highest average wind speed) are January and March (8.6mph).
The calmest months (with the lowest average wind speed) are July and August (5.7mph).

[Resources]

Average rainfall
Haddam, CT

Average rainfall - Haddam, CT

The wettest month (with the highest rainfall) is July (1.18").
The driest month (with the least rainfall) is September (0.39").

[Resources]

Average rainfall days
Haddam, CT

Average rainfall days - Haddam, CT

The month with the highest number of rainy days is July (12.7 days).
The month with the least rainy days is January (5.9 days).

[Resources]

Average snowfall
Haddam, CT

Average snowfall - Haddam, CT

The month with the highest snowfall is March (1.14").
Months with the least snowfall are June, July, August, September and October (0").

[Resources]

Average snowfall days
Haddam, CT

Average snowfall days - Haddam, CT

The month with the highest number of snowfall days is February (5.2 days).
Months with the least snowfall days are June, July, August, September and October (0 days).

[Resources]

Average daylight / Average sunshine
Haddam, CT

Average daylight / Average sunshine - Haddam, CT

The month with the longest days is June (Average daylight: 15.1h).
The month with the shortest days is December (Average daylight: 9.2h).

Months with the most sunshine are July and August (Average sunshine: 10.1h).
The month with the least sunshine is February (Average sunshine: 4.5h).

[Resources]

Average sunshine days
Haddam, CT

Average sunshine days - Haddam, CT

The month with the most sunshine days is November (20.9 days).
The month with the least sunshine days is July (16.3 days).

[Resources]

Average UV index
Haddam, CT

Average UV index - Haddam, 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
Haddam, CT

Average visibility - Haddam, CT

Months with the highest visibility are January, March, April, September, October, November and December (6mi).
Months with the lowest visibility are February, May, June, July and August (5mi).

[Resources]