December weather forecast
Bethel, CT

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Weather in December

The first month of the winter, December, is still a cold month in Bethel, Connecticut, with an average temperature fluctuating between 39.6°F (4.2°C) and 29.3°F (-1.5°C).

Temperature

In Bethel, the beginning of December is marked by a lowered average high-temperature, shifting from November's frosty 48.7°F (9.3°C) to a cold 39.6°F (4.2°C). Throughout the month of December, Bethel observes an average nighttime temperature of 29.3°F (-1.5°C).

Humidity

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

Rainfall

In December, in Bethel, the rain falls for 8.1 days. Throughout December, 1.02" (26mm) of precipitation is accumulated. In Bethel, during the entire year, the rain falls for 123.7 days and collects up to 11.65" (296mm) of precipitation.

Snowfall

January through April, October through December are months with snowfall. In December, in Bethel, Connecticut, it is snowing for 4.1 days. Throughout December, 0.55" (14mm) of snow is accumulated. In Bethel, during the entire year, snow falls for 20.5 days and aggregates up to 2.68" (68mm) of snow.

Daylight

The month with the shortest days in Bethel is December, with an average of 9h and 12min of daylight.
On the first day of the month, sunrise is at 7:00 am and sunset at 4:25 pm. On the last day of December, sunrise is at 7:19 am and sunset at 4:34 pm EST.

Sunshine

The average sunshine in December in Bethel is 4.7h.

UV index

With an average maximum UV index of 1, December is the month with the lowest UV index. A UV Index value of 2, and less, symbolizes a low health risk from exposure to the Sun's UV rays for the ordinary person.
Note: The maximum daily UV index, 1 in December, converts into the following recommendations:
Children necessitate constant protection from sunlight, unlike the majority, who can remain under the sun for about an hour without burning. The best time to avoid the Sun's harmful UV radiation is during midday when it's most potent. Wearing sunglasses with both UVA and UVB protection effectively reduces sun-induced eye damage. Forewarned is forearmed! The Sun's UV radiation can be almost doubled in intensity by snow reflection.
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Frequently asked questions

How cold is December in Bethel?

An average high-temperature, in December, in Bethel, is 39.6°F (4.2°C) and the average low-temperature is 29.3°F (-1.5°C). In July, the average heat index (a.k.a. 'apparent temperature', 'felt air temperature'), which combines relative humidity and air temperature, is appraised at 87.8°F (31°C).

What is the average humidity in December in Bethel?

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

How many days does it rain in December in Bethel?

In Bethel, in December, during 8.1 rainfall days, 1.02" (26mm) of precipitation is typically accumulated.

How much does it snow in Bethel in December?

In December, it is snowing for 4.1 days. Throughout December, 0.55" (14mm) of snow is accumulated.

What is the month with the shortest days in Bethel?

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

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

In December, the average day length in Bethel, Connecticut, is 9h and 15min.

When are sunrise and sunset in December in Bethel?

In December, on the first day of the month, sunrise is at 7:00 am and sunset at 4:25 pm. On the last day of the month, in Bethel, Connecticut, sunrise is at 7:19 am and sunset at 4:34 pm EST.

How many hours of sunshine does Bethel have in December?

The average sunshine duration in December is 4.7h.

When is the lowest UV index in Bethel?

With an average maximum UV index of 1, December is the month with the lowest UV index in Bethel, Connecticut.

What is the UV index reading in December in Bethel?

The average daily maximum UV index in December in Bethel is 1. A UV Index value of 2, and less, symbolizes a low health threat from unsafe 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
Bethel, CT

Average temperature in December - Bethel, CT
  • Average high temperature in December: 39.6°F

The warmest month (with the highest average high temperature) is July (82°F).
The month with the lowest average high temperature is January (33.4°F).

  • Average low temperature in December: 29.3°F

The month with the highest average low temperature is July (64.2°F).
The coldest month (with the lowest average low temperature) is January (22.6°F).

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Average pressure in December
Bethel, CT

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

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

The windiest months (with the highest average wind speed) are January and March (8.2mph).
The calmest month (with the lowest average wind speed) is August (5.2mph).

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Average humidity in December
Bethel, CT

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

The months with the highest relative humidity are February and October (79%).
The month with the lowest relative humidity is April (72%).

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Average rainfall in December
Bethel, CT

Average rainfall in December - Bethel, CT
  • Average rainfall in December: 1.02"

The wettest month (with the highest rainfall) is July (1.57").
The driest months (with the least rainfall) are January and February (0.55").

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Average rainfall days in December
Bethel, CT

Average rainfall days in December - Bethel, CT
  • Average rainfall days in December: 8.1 days

The month with the highest number of rainy days is July (14.4 days).
The month with the least rainy days is January (5.5 days).

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Average snowfall in December
Bethel, CT

Average snowfall in December - Bethel, CT
  • Average snowfall in December: 0.55"

The months with the highest snowfall are January and February (0.75").
The months with the least snowfall are May, June, July, August and September (0").

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Average snowfall days in December
Bethel, CT

Average snowfall days in December - Bethel, CT
  • Average snowfall days in December: 4.1 days

The month with the highest number of snowfall days is February (5.7 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
Bethel, CT

Average daylight in December / Average sunshine in December - Bethel, CT
  • Average daylight in December: 9h and 1min

The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 12min).

  • Average sunshine in December: 4h and 4min

The months with the most sunshine are July and August (Average sunshine: 10h and 12min).
The month with the least sunshine is February (Average sunshine: 4h and 30min).

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Average sunshine days in December
Bethel, CT

Average sunshine days in December - Bethel, CT
  • Average sunshine days in December: 19.3 days

The month with the most sunshine days is January (22.5 days).
The month with the least sunshine days is June (13.3 days).

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Average UV index in December
Bethel, CT

Average UV index in December - Bethel, CT
  • Average UV index in December: 1

The months with the highest UV index are June, July and August (UV index 6).
The month with the lowest UV index is December (UV index 1).

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Average cloud cover in December
Bethel, CT

Average cloud cover in December - Bethel, CT
  • Average cloud cover in December: 50

The months with the most cloud cover are February, March and December (Cloud cover 50).
The month with the least cloud cover is August (Cloud cover 33).

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Average visibility in December
Bethel, CT

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

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

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Bethel, Connecticut, USA

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