December weather forecast
Riverton, CT

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Weather in December

The first month of the winter, December, is also an icy month in Riverton, Connecticut, with an average temperature ranging between max 36.3°F (2.4°C) and min 25.7°F (-3.5°C).

Temperature

With the onset of December, Riverton's average high-temperature adjusts, receding from November's frosty 46.6°F (8.1°C) to a cold 36.3°F (2.4°C). Throughout the month of December, Riverton sees a steady low-temperature average of 25.7°F (-3.5°C).

Humidity

In Riverton, Connecticut, the average relative humidity in December is 80%.

Rainfall

In December, the rain falls for 8.4 days. Throughout December, 1.3" (33mm) of precipitation is accumulated. In Riverton, during the entire year, the rain falls for 134.4 days and collects up to 15.67" (398mm) of precipitation.

Snowfall

Months with snowfall are January through April, October through December. In Riverton, in December, during 6 snowfall days, 1.3" (33mm) of snow is typically accumulated. In Riverton, during the entire year, snow falls for 33.4 days and aggregates up to 7.32" (186mm) 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 7:01 am and sunset at 4:21 pm. On the last day of December, sunrise is at 7:19 am and sunset at 4:30 pm EST.

Sunshine

The average sunshine in December is 4.5h.

UV index

The months with the lowest UV index are January through March, November and December, with an average maximum UV index of 2. A UV Index reading of 2, and below, represents a low threat to health from exposure to the Sun's UV rays for the average person.
Note: In December, the average maximum UV index of 2 translates into the following recommendations:
Babies, children, and individuals with sensitive skin should always have protection against extended sun exposure. During midday, the Sun's radiation is strongest, and it's advisable to reduce direct exposure. Equip yourself with UVA and UVB-filtering sunglasses on clear, sunny days. Guard yourself! Snow reflection can almost double the UV radiation from the Sun.
Updated: Aug 31, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

How cold is it in December?

The average high-temperature and low-temperature during December are 36.3°F (2.4°C) and 25.7°F (-3.5°C) respectively. In July, the average heat index (a.k.a. 'felt air temperature', 'feels like'), which combines air temperature and relative humidity, is appraised at 86°F (30°C).

What is the average humidity in December?

In December, the average relative humidity is 80%.

How many days does it rain in December?

In Riverton, in December, it is raining for 8.4 days, with typically 1.3" (33mm) of accumulated precipitation.

How much does it snow in December?

In December, it is snowing for 6 days. Throughout December, 1.3" (33mm) of snow is accumulated.

What is the month with the shortest days?

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

What is the average length of the day in December?

In December, the average day length in Riverton is 9h and 11min.

When are sunrise and sunset in December?

In December, on the first day of the month, sunrise is at 7:01 am and sunset at 4:21 pm. On the last day of the month, sunrise is at 7:19 am and sunset at 4:30 pm EST.

How many hours of sunshine does Riverton have in December?

The average sunshine duration in December is 4.5h.

What are the months with the lowest UV index?

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

How high is the UV index in December?

The average daily maximum UV index in December is 2. A UV Index reading of 2, and below, represents a low health risk 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
Riverton, CT

Average temperature in December - Riverton, CT
  • Average high temperature in December: 36.3°F

The warmest month (with the highest average high temperature) is July (81°F).
The month with the lowest average high temperature is January (30.6°F).

  • Average low temperature in December: 25.7°F

The month with the highest average low temperature is July (61.3°F).
The coldest month (with the lowest average low temperature) is January (18.7°F).

Average pressure in December
Riverton, CT

Average pressure in December - Riverton, 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
Riverton, CT

Average wind speed in December - Riverton, CT
  • Average wind speed in December: 8.3mph

The windiest month (with the highest average wind speed) is January (8.7mph).
The calmest months (with the lowest average wind speed) are July and August (5.3mph).

Average humidity in December
Riverton, CT

Average humidity in December - Riverton, CT
  • Average humidity in December: 80%

The month with the highest relative humidity is February (82%).
The month with the lowest relative humidity is April (73%).

Average rainfall in December
Riverton, CT

Average rainfall in December - Riverton, CT
  • Average rainfall in December: 1.3"

The wettest month (with the highest rainfall) is July (1.85").
The driest month (with the least rainfall) is January (0.75").

Average rainfall days in December
Riverton, CT

Average rainfall days in December - Riverton, CT
  • Average rainfall days in December: 8.4 days

The months with the highest number of rainy days are May and July (15.3 days).
The month with the least rainy days is February (5.9 days).

Average snowfall in December
Riverton, CT

Average snowfall in December - Riverton, CT
  • Average snowfall in December: 1.3"

The month with the highest snowfall is February (2.52").
The months with the least snowfall are May, June, July, August and September (0").

Average snowfall days in December
Riverton, CT

Average snowfall days in December - Riverton, CT
  • Average snowfall days in December: 6 days

The month with the highest number of snowfall days is February (9.3 days).
The months with the least snowfall days are June, July, August and September (0 days).

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

Average daylight in December / Average sunshine in December - Riverton, 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 3min

The month with the most sunshine is July (Average sunshine: 9h and 54min).
The month with the least sunshine is February (Average sunshine: 4h and 18min).

Average sunshine days in December
Riverton, CT

Average sunshine days in December - Riverton, CT
  • Average sunshine days in December: 18.1 days

The month with the most sunshine days is January (19.4 days).
The months with the least sunshine days are April and May (13.1 days).

Average UV index in December
Riverton, CT

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

The month with the highest UV index is June (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
Riverton, CT

Average cloud cover in December - Riverton, CT
  • Average cloud cover in December: 52

The month with the most cloud cover is February (Cloud cover 54).
The month with the least cloud cover is August (Cloud cover 38).

Average visibility in December
Riverton, CT

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

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

Riverton, Connecticut, USA

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