December weather forecast and climate
Hamden, CT

Weather in December

December, the first month of the winter, in Hamden, is also a wintry month, with average temperature fluctuating between 30.4°F (-0.9°C) and 40.3°F (4.6°C).

Temperature

In Hamden, the average high-temperature decreases, from a frosty 49.5°F (9.7°C) in November, to a wintry 40.3°F (4.6°C). In December, in Hamden, the average low-temperature is 30.4°F (-0.9°C).

Humidity

In Hamden, the average relative humidity in December is 76%.

Rainfall

In Hamden, during 9.4 rainfall days, 1.46" (37mm) of precipitation is typically accumulated. In Hamden, during the entire year, the rain falls for 134.2 days and collects up to 15.12" (384mm) of precipitation.

Snowfall

Months with snowfall are January through May, November and December. In Hamden, during December, snow falls for 3.3 days and regularly aggregates up to 0.83" (21mm) of snow. In Hamden, during the entire year, snow falls for 20.5 days, and aggregates up to 4.02" (102mm) of snow.

Daylight

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

Sunshine

The average sunshine is 4.8h.

UV index

January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index estimate of 2, and below, represents a low health risk from unsafe exposure to the UV radiation for the average person.
Note: The average daily UV index of 2 transform into the following instructions:
People with sensitive skin, children, and babies should always be protected from prolonged sun exposure. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
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FAQ

What is the temperature in December in Hamden?

The average high-temperature, in December, is 40.3°F (4.6°C), while the average low-temperature is 30.4°F (-0.9°C).

What is the average humidity in December in Hamden?

In December, the average relative humidity in Hamden is 76%.

How many days does it rain in December in Hamden?

In December, in Hamden, Connecticut, the rain falls for 9.4 days. Throughout December, 1.46" (37mm) of precipitation is accumulated.

How many days does it snow in December in Hamden?

In Hamden, Connecticut, in December, during 3.3 snowfall days, 0.83" (21mm) of snow is typically accumulated.

What is the month with the shortest days in Hamden?

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

How many hours of daylight does Hamden have in December?

In December, the average length of the day in Hamden is 9.2h.

How many hours of sunshine does Hamden have in December?

In December, the average sunshine in Hamden, Connecticut, is 4.8h.

What is the month with the lowest UV index in Hamden?

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

How high is the UV index in December in Hamden?

In Hamden, Connecticut, the average daily maximum UV index in December is 2. A UV Index reading of 2, and below, represents a minimal hazard to health from unsafe exposure to the Sun's UV rays.

Average temperature in December
Hamden, CT

Average temperature in December - Hamden, CT
  • Average high temperature in December: 40.3°F

The warmest month (with the highest average high temperature) is July (81.7°F).
The month with the lowest average high temperature is January (34.5°F).

  • Average low temperature in December: 30.4°F

The month with the highest average low temperature is July (65.5°F).
The coldest month (with the lowest average low temperature) is January (23.4°F).

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Average pressure in December
Hamden, CT

Average pressure in December - Hamden, CT
  • Average pressure in December: 30.06"

The month with the highest atmospheric pressure is November (30.09").
The month with the lowest atmospheric pressure is June (29.93").

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Average wind speed in December
Hamden, CT

Average wind speed in December - Hamden, CT
  • Average wind speed in December: 8.9mph

The windiest month (with the highest average wind speed) is January (9.2mph).
The calmest months (with the lowest average wind speed) are July and August (6mph).

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Average humidity in December
Hamden, CT

Average humidity in December - Hamden, CT
  • Average humidity in December: 76%

The month with the highest relative humidity is February (78%).
The month with the lowest relative humidity is April (72%).

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Average rainfall in December
Hamden, CT

Average rainfall in December - Hamden, CT
  • Average rainfall in December: 1.46"

The wettest month (with the highest rainfall) is July (1.69").
The driest month (with the least rainfall) is February (0.79").

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Average rainfall days in December
Hamden, CT

Average rainfall days in December - Hamden, CT
  • Average rainfall days in December: 9.4 days

The month with the highest number of rainy days is July (15.3 days).
The month with the least rainy days is January (7.2 days).

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Average snowfall in December
Hamden, CT

Average snowfall in December - Hamden, CT
  • Average snowfall in December: 0.83"

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

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Average snowfall days in December
Hamden, CT

Average snowfall days in December - Hamden, CT
  • Average snowfall days in December: 3.3 days

The month with the highest number of snowfall days is February (6.7 days).
Months with the least snowfall days are June, July, August, September and October (0 days).

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Average daylight in December /
Average sunshine in December
Hamden, CT

Average daylight in December / Average sunshine in December - Hamden, CT
  • Average daylight in December: 9.2h

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

  • Average sunshine in December: 4.8h

Months with the most sunshine are July and August (Average sunshine: 10.4h).
The month with the least sunshine is February (Average sunshine: 4.7h).

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Average sunshine days in December
Hamden, CT

Average sunshine days in December - Hamden, CT
  • Average sunshine days in December: 18.4 days

The month with the most sunshine days is January (20.8 days).
The month with the least sunshine days is June (13.2 days).

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Average UV index in December
Hamden, CT

Average UV index in December - Hamden, CT
  • Average UV index in December: 2

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).

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Average cloud cover in December
Hamden, CT

Average cloud cover in December - Hamden, CT
  • Average cloud cover in December: 48

The month with the most cloud cover is February (Cloud cover 49).
The month with the least cloud cover is August (Cloud cover 31).

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Average visibility in December
Hamden, CT

Average visibility in December - Hamden, CT
  • Average visibility in December: 6mi

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

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