December weather - Winter 2024

Weather in December
Frequently asked questions
Average temperature in December
Average pressure in December
Average wind speed in December
Average humidity in December
Average rainfall in December
Average rainfall days in December
Average snowfall in December
Average snowfall days in December
Average daylight in December
Average sunshine in December
Average sunshine days in December
Average UV index in December
Average cloud cover in December
Average visibility in December

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

Weather in December

December sees Bolton settling into the characteristic winter routine, with signs of the season evident all around the city. As the temperatures drop drastically, the city receives an average snowfall of about 3.15" (80mm), turning the cityscape into a winter wonderland. Shorter days and longer nights underscore the presence of winter, cutting short any outdoor exploits. Despite the harsh weather, the sight of pristine snow adorning the houses and streets and the joy of upcoming holiday festivities add a certain charm to the December climate. Undoubtedly, the city in December is a spectacle to behold, despite the fierce temperatures and heavy layers of clothing.

Temperature

A decrease in the average high-temperature is observed in Bolton during December, shifting from a frosty 48.9°F (9.4°C) in November to a wintry 38.7°F (3.7°C). During the December nights, an average temperature of 28°F (-2.2°C) is observed in Bolton, Connecticut.

Humidity

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

Rainfall

December is the month with the most rainfall in Bolton. Rain falls for 11.8 days and accumulates 3.27" (83mm) of precipitation.

Snowfall

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

Daylight

With an average of 9h and 12min of daylight, December has the shortest days of the year in Bolton.
On the first day of December in Bolton, sunrise is at 6:58 am and sunset at 4:19 pm. On the last day of the month, sunrise is at 7:16 am and sunset at 4:29 pm EST.

Sunshine

The average sunshine in December in Bolton is 4.8h.

UV index

The months with the lowest UV index in Bolton are January through March, November and December, with an average maximum UV index of 2. A UV Index estimate of 2, and below, represents a low threat to health from unprotected exposure to Sun's UV rays for the average person.
Note: The maximum UV index of 2 during December leads to these instructions:
Children, infants, and individuals with sensitive skin should be constantly protected from extended sun exposure. UV radiation is strongest from the Sun during midday; protect yourself by staying in shaded areas. Experience reduced UV exposure by about half when donning a wide-brim hat. Consider this! The reflection from snow can almost double the intensity of the Sun's UV radiation.

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Frequently asked questions

How cold is it in Bolton in December?

In Bolton, 38.7°F (3.7°C) is the average high-temperature and 28°F (-2.2°C) is the average low-temperature during December. The average heat index (a.k.a. 'apparent temperature', 'real feel'), which calculates the temperature value influenced by the moisture in the air, in August is computed to be 86°F (30°C).

What is the average humidity in December in Bolton?

The average relative humidity in December in Bolton is 78%.

What is the wettest month in Bolton?

December is the month with the most rainfall in Bolton. Rain falls for 11.8 days and accumulates 3.27" (83mm) of precipitation.

How much does it rain in Bolton in December?

In Bolton, Connecticut, in December, during 11.8 rainfall days, 3.27" (83mm) of precipitation is typically accumulated.

How much does it snow in Bolton in December?

In Bolton, Connecticut, 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?

December has the shortest days of the year in Bolton, with an average of 9h and 12min of daylight.

What is the average length of the day in December in Bolton?

In December, the average day length in Bolton, Connecticut, 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 6:58 am and sunset at 4:19 pm. On the last day of the month, sunrise is at 7:16 am and sunset at 4:29 pm EST.

How many hours of sunshine does Bolton have in December?

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

When is 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 reading in December in Bolton?

In December, the average daily maximum UV index in Bolton, Connecticut, is 2. A UV Index value of 2, and less, symbolizes a minimal hazard to health from exposure to the Sun's UV radiation.

Today

Tomorrow

Long-term

Year J F M A M J J A S O N December

Nov

December

Jan

Average high temperature

48.9°F 9.4°C

38.7°F 3.7°C

32.9°F 0.5°C

Average low temperature

Average pressure

Average wind speed

Average max. wind speed

8mph 12.9km/h

8.3mph 13.4km/h

8.7mph 14km/h

Average wind speed gusts

Average humidity

Average rainfall

Average rainfall days

Average snowfall

Average snowfall days

Average daylight

Average sunshine

Average sunshine days

17.2

15.1

Average UV index

Average cloud cover

Average visibility

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: 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: 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: 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: 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: 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: 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: 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: 9h and 1min

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

Average sunshine in December: 4h and 5min

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: 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: 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: 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: 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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December weather forecast
Bolton, CT

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