December weather forecast and climate
Bethany, CT

Weather in December

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

Temperature

In Bethany, the average high-temperature decreases, from a frosty 49.5°F (9.7°C) in November, to a wintry 40.3°F (4.6°C). In December, in Bethany, Connecticut, the average low-temperature is 30.4°F (-0.9°C).

Humidity

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, there are 134.2 rainfall days, and 15.12" (384mm) of precipitation is accumulated.

Snowfall

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

Daylight

The month with the shortest days is December, with an average of 9.2h of daylight.

Sunshine

The average sunshine in Bethany 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 Bethany. A UV Index estimate of 2, and below, represents a minimal health hazard from the exposure to the Sun's UV rays for ordinary individuals.
Note: The daily maximum UV index of 2 interpret into the following advice:
For the majority, extended sun exposure is not of great concern. Infants and people with sensitive skin must always be protected. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. 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 Bethany?

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

How much does it rain in Bethany in December?

In Bethany, Connecticut, in December, it is raining for 9.4 days, with typically 1.46" (37mm) of accumulated precipitation.

How many days does it snow in December in Bethany?

In Bethany, in December, during 3.3 snowfall days, 0.83" (21mm) of snow is typically accumulated.

What is the month with the shortest days in Bethany?

December has the shortest days of the year in Bethany, with an average of 9.2h of daylight.

How many hours of daylight does Bethany have in December?

In Bethany, Connecticut, the average length of the day in December is 9.2h.

How many hours of sunshine does Bethany have in December?

In December, the average sunshine in Bethany 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, Connecticut.

What is the UV index intensity in December in Bethany?

In December, the average daily maximum UV index in Bethany, Connecticut, is 2. A UV Index reading of 2, and below, represents a low health risk from unsafe exposure to the Sun's UV rays.

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).

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Average pressure in December
Bethany, CT

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

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

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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).

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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%).

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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").

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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).

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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").
Months with the least snowfall are June, July, August, September and October (0").

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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).
Months with the least snowfall days are June, July, August, September and October (0 days).

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

Average daylight in December / Average sunshine in December - Bethany, CT
  • Average daylight in December: 9.2h

The month with the longest days is June (Average daylight: 15.1h).
The month with the shortest days is December (Average daylight: 9.2h).

  • Average sunshine in December: 4.8h

Months with the most sunshine are July and August (Average sunshine: 10.4h).
The month with the least sunshine is February (Average sunshine: 4.7h).

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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).

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Average UV index in December
Bethany, CT

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

Months with the highest UV index are June, July and August (UV index 6).
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
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).

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Average visibility in December
Bethany, CT

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

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).

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