December weather forecast
Bolton, CT

Grass, brown sand, and trees on an empty beach in Bolton, Connecticut, overlooking the blue waters far out
Grass, brown sand, and trees on an empty beach in Bolton, Connecticut, overlooking the blue waters far out

Weather in December

The first month of the winter, December, is still a cold month in Bolton, Connecticut, with an average temperature ranging between max 38.7°F (3.7°C) and min 28°F (-2.2°C).

Temperature

In December, the average high-temperature drops from a chilly 48.9°F (9.4°C) in November to a cold 38.7°F (3.7°C). The average low-temperature, in December, is 28°F (-2.2°C).

Humidity

In Bolton, Connecticut, the average relative humidity in December is 78%.

Rainfall

The month with the most rainfall in Bolton is December, when the rain falls for 11.8 days and typically aggregates up to 3.27" (83mm) of precipitation.

Snowfall

Months with snowfall in Bolton, Connecticut, are January through May, October through December. In Bolton, during December, snow falls for 5.8 days and regularly aggregates up to 3.15" (80mm) of snow. Throughout the year, in Bolton, Connecticut, there are 31.6 snowfall days, and 17.13" (435mm) of snow is accumulated.

Daylight

The month with the shortest days is December, with an average of 9h and 12min of daylight.
On the first day of the month, sunrise is at 6:57 am and sunset at 4:20 pm. On the last day of December, sunrise is at 7:16 am and sunset at 4:28 pm EST.

Sunshine

In December, the average sunshine in Bolton 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 in Bolton. A UV Index value of 2, and less, symbolizes a minimal health vulnerability from unsafe exposure to UV radiation for the ordinary person.
Note: The daily maximum UV index of 2 in December interpret into the following advice:
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. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun. 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 average humidity in December in Bolton?

In Bolton, the average relative humidity in December is 78%.

What is the rainiest month in Bolton?

The month with the most rainfall in Bolton is December, when the rain falls for 11.8 days and typically aggregates up to 3.27" (83mm) of precipitation.

How many days does it rain in December in Bolton?

In Bolton, Connecticut, during December, the rain falls for 11.8 days and regularly aggregates up to 3.27" (83mm) of precipitation.

How much does it snow in Bolton in December?

In Bolton, in December, snow falls for 5.8 days, with typically accumulated 3.15" (80mm) of snow.

What is the month with the shortest days in Bolton?

The month with the shortest days is December, with an average of 9h and 12min of daylight.

How many hours of daylight does Bolton have in December?

In December, the average day length is 9h and 12min.

When is the sunrise / sunset in December in Bolton?

In December, on the first day of the month, sunrise is at 6:57 am and sunset at 4:20 pm. On the last day of the month, in Bolton, Connecticut, sunrise is at 7:16 am and sunset at 4:28 pm EST.

How long on average sun shines in December in Bolton?

The average sunshine duration in December in Bolton, Connecticut, is 4.8h.

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

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

What is the UV index intensity in December in Bolton?

The average daily maximum UV index in December in Bolton, Connecticut, is 2. A UV Index reading of 2, and below, represents a low health threat from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in December
Bolton, CT

Average temperature in December - Bolton, CT
  • Average high temperature in December: 38.7°F

The warmest month (with the highest average high temperature) is July (83.1°F).
The month with the lowest average high temperature is January (32.9°F).

  • Average low temperature in December: 28°F

The month with the highest average low temperature is July (63.5°F).
The coldest month (with the lowest average low temperature) is January (21.2°F).

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Average pressure in December
Bolton, CT

Average pressure in December - Bolton, CT
  • Average pressure in December: 30.05"Hg

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

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Average wind speed in December
Bolton, CT

Average wind speed in December - Bolton, CT
  • Average wind speed in December: 7.8mph

The windiest months (with the highest average wind speed) are January and March (8.1mph).
The calmest month (with the lowest average wind speed) is August (5.2mph).

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Average humidity in December
Bolton, CT

Average humidity in December - Bolton, CT
  • Average humidity in December: 78%

The month with the highest relative humidity is February (80%).
The month with the lowest relative humidity is April (71%).

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Average rainfall in December
Bolton, CT

Average rainfall in December - Bolton, CT
  • Average rainfall in December: 3.27"

The wettest month (with the highest rainfall) is December (3.27").
The driest month (with the least rainfall) is September (1.77").

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Average rainfall days in December
Bolton, CT

Average rainfall days in December - Bolton, CT
  • Average rainfall days in December: 11.8 days

The month with the highest number of rainy days is July (17.3 days).
The month with the least rainy days is January (10 days).

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Average snowfall in December
Bolton, CT

Average snowfall in December - Bolton, CT
  • Average snowfall in December: 3.15"

The month with the highest snowfall is February (4.8").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in December
Bolton, CT

Average snowfall days in December - Bolton, CT
  • Average snowfall days in December: 5.8 days

The month with the highest number of snowfall days is February (8.5 days).
The months with the least snowfall days are June, July, August and September (0 days).

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

Average daylight in December / Average sunshine in December - Bolton, CT
  • Average daylight in December: 9h and 12min

The month with the longest days is June (Average daylight: 15h and 10min).
The month with the shortest days is December (Average daylight: 9h and 12min).

  • Average sunshine in December: 4h and 48min

The months with the most sunshine are July and August (Average sunshine: 10h and 24min).
The month with the least sunshine is February (Average sunshine: 4h and 36min).

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Average sunshine days in December
Bolton, CT

Average sunshine days in December - Bolton, CT
  • Average sunshine days in December: 15.1 days

The month with the most sunshine days is November (17.2 days).
The month with the least sunshine days is June (11.2 days).

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Average UV index in December
Bolton, CT

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

The months with the highest UV index are June and July (UV index 6).
The 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
Bolton, CT

Average cloud cover in December - Bolton, 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 33).

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Average visibility in December
Bolton, CT

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

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

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