December weather forecast
Bethany, CT

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Weather in December

The first month of the winter, December, is also an icy month in Bethany, Connecticut, with an average temperature ranging between max 40.3°F (4.6°C) and min 30.4°F (-0.9°C).

Temperature

Bethany's weather changes with the onset of December, slightly falling from a chilly 49.5°F (9.7°C) in November to a cold 40.3°F (4.6°C). During December, the average low-temperature is a freezing cold 30.4°F (-0.9°C).

Humidity

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

Rainfall

In Bethany, in December, it is raining for 9.4 days, with typically 1.46" (37mm) of accumulated precipitation. Throughout the year, in Bethany, Connecticut, there are 134.2 rainfall days, and 15.12" (384mm) of precipitation is accumulated.

Snowfall

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

Daylight

With an average of 9h and 12min of daylight, December has the shortest days of the year.
On the first day of December in Bethany, sunrise is at 6:59 am and sunset at 4:23 pm. On the last day of the month, sunrise is at 7:18 am and sunset at 4:32 pm EST.

Sunshine

The average sunshine in December 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 of 2, and less, symbolizes a low health risk from unprotected exposure to Sun's UV rays for the ordinary person.
Note: The average daily UV index of 2 in December transforms into the following instructions:
Long-term sun exposure is typically not a concern for most. However, those with sensitive skin, infants, and children must always have protection. Minimize direct exposure to the Sun during midday when its radiation is at its peak. To cut down UV radiation exposure by about half, sport a wide-brim hat. Take to heart! Snow reflection can almost magnify the Sun's UV radiation twofold.
Updated: Feb 10, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

How cold does it get in Bethany in December?

The high-temperature, in December, in Bethany, records 40.3°F (4.6°C), while the low-temperature is 30.4°F (-0.9°C). In July, the average heat index (a.k.a. 'feels like', 'felt air temperature'), which factors the actual air temperature with the relative humidity, is computed to be 87.8°F (31°C).

What is the average humidity in December in Bethany?

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

How much does it rain in Bethany in December?

In December, in Bethany, 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 Bethany?

In Bethany, Connecticut, during December, snow falls for 3.3 days and regularly aggregates up to 0.83" (21mm) of snow.

What is the month with the shortest days in Bethany?

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

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

In December, the average day length in Bethany is 9h and 14min.

What time are sunrise and sunset in December in Bethany?

On the first day of December, sunrise is at 6:59 am and sunset at 4:23 pm. On the last day of the month, sunrise is at 7:18 am and sunset at 4:32 pm EST.

How many hours of sunshine does Bethany have in December?

In December, the average sunshine duration is 4.8h.

When is the lowest UV index in Bethany?

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

How high is the UV index in December in Bethany?

In Bethany, Connecticut, the average daily maximum UV index in December is 2. A UV Index estimate of 2, and below, represents a minimal health vulnerability from exposure to the Sun's UV radiation.
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
Bethany, CT

Average temperature in December - Bethany, 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).

Average pressure in December
Bethany, CT

Average pressure in December - Bethany, 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
Bethany, CT

Average wind speed in December - Bethany, 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).

Average humidity in December
Bethany, CT

Average humidity in December - Bethany, 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%).

Average rainfall in December
Bethany, CT

Average rainfall in December - Bethany, 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").

Average rainfall days in December
Bethany, CT

Average rainfall days in December - Bethany, 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).

Average snowfall in December
Bethany, CT

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

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

Average snowfall days in December
Bethany, CT

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

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

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

Average daylight in December / Average sunshine in December - Bethany, 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 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 42min).

Average sunshine days in December
Bethany, CT

Average sunshine days in December - Bethany, 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).

Average UV index in December
Bethany, CT

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

The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 2).

Average cloud cover in December
Bethany, CT

Average cloud cover in December - Bethany, 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).

Average visibility in December
Bethany, CT

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

The 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).

Bethany, Connecticut, USA

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