December weather forecast
Bethel, CT

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Weather in December

December, the first month of the winter in Bethel, is also a wintry month, with temperature in the range of an average low of 29.3°F (-1.5°C) and an average high of 39.6°F (4.2°C).

Temperature

December indicates a shift in the average high-temperature, from November's frosty 48.7°F (9.3°C) to a wintry 39.6°F (4.2°C). Bethel registers a consistent average low-temperature of 29.3°F (-1.5°C) during December.

Humidity

In December, the average relative humidity is 78%.

Rainfall

In Bethel, in December, it is raining for 8.1 days, with typically 1.02" (26mm) of accumulated precipitation. Throughout the year, there are 123.7 rainfall days, and 11.65" (296mm) of precipitation is accumulated.

Snowfall

Months with snowfall are January through April, October through December. In Bethel, during December, snow falls for 4.1 days and regularly aggregates up to 0.55" (14mm) of snow. 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 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

In Bethel, the average sunshine in December is 4.7h.

UV index

The month with the lowest UV index is December, with an average maximum UV index of 1. A UV Index estimate of 2, and below, represents a minimal health hazard from exposure to the Sun's UV radiation for average individuals.
Note: The maximum daily UV index, 1 in December, converts into the following recommendations:
Despite most people tolerating extended sun exposure, it is critical to always protect those with sensitive skin, infants, and children. Limiting sun exposure during midday hours helps in reducing the harmful effects of UV radiation. During bright days, sunglasses that offer UVA and UVB defense are recommended. Be mindful! The reflection from snow can increase the Sun's UV radiation nearly twice.
Updated: Jun 20, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

How cold does it get in December?

In Bethel, in December, the average high-temperature 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. 'real feel', 'apparent temperature'), which combines air temperature and relative humidity, is appraised at 87.8°F (31°C).

What is the average humidity in December?

The average relative humidity in December is 78%.

How many days does it rain in December in Bethel?

In December, the rain falls for 8.1 days. Throughout December, 1.02" (26mm) of precipitation is accumulated.

How much does it snow in December?

In Bethel, during December, snow falls for 4.1 days and regularly aggregates up to 0.55" (14mm) of snow.

What is the month with the shortest days?

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

How many hours of daylight does Bethel have in December?

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

When are sunrise and sunset in December?

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

How long on average sun shines in December?

The average sunshine duration in December is 4.7h.

What is the month with the lowest UV index?

December is the month with the lowest UV index, with an average maximum UV index of 1.

What is the UV index reading in December?

In December, the average daily maximum UV index is 1. A UV Index estimate of 2, and below, represents a minimal health vulnerability 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).

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).

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).

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%).

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").

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).

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").

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).

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).

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).

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).

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).

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).

Bethel, Connecticut, USA

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