Contents
- Weather in December
- Frequently asked questions
- Average temperature in December
- Average pressure in December
- Average wind speed in December
- Average humidity in December
- Average rainfall in December
- Average rainfall days in December
- Average snowfall in December
- Average snowfall days in December
- Average daylight in December
- Average sunshine in December
- Average sunshine days in December
- Average UV index in December
- Average cloud cover in December
- Average visibility in December
Weather in December
Temperature
The shift from November to December involves a decrease in the average high-temperature, dropping from a frosty 49.1°F (9.5°C) to an icy 39.4°F (4.1°C). Columbia's average low-temperature is measured at a subzero cold 28.6°F (-1.9°C) during December.Humidity
In December, the average relative humidity is 77%.Rainfall
December is the month with the most rainfall. Rain falls for 11.5 days and accumulates 3.46" (88mm) of precipitation.Snowfall
Months with snowfall in Columbia are January through May, November and December. In December, it is snowing for 5.5 days. Throughout December, 2.72" (69mm) of snow is accumulated. In Columbia, during the entire year, snow falls for 31.6 days and aggregates up to 15.98" (406mm) 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 Columbia, sunrise is at 6:57 am and sunset at 4:19 pm. On the last day of the month, sunrise is at 7:16 am and sunset at 4:28 pm EST.
Sunshine
With an average of 4.7h of sunshine, December has the least sunshine of the year.UV index
January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Columbia. A UV Index estimate of 2, and below, represents a low health risk from unprotected exposure to Sun's UV rays for average individuals.Note: The daily high UV index of 2 during December translates into the following recommendations:
While many people can endure lengthy sun exposure, it remains imperative to safeguard babies, children, and fair-skinned individuals. The Sun's radiation is especially intense around midday; try to stay in shade during this period. During bright days, sunglasses that offer UVA and UVB defense are recommended. Be advised! The UV radiation from the Sun can be almost doubled due to the reflective properties of snow.
Frequently asked questions
Is it cold in Columbia during December?
What is the average humidity in December in Columbia?
What is the rainiest month in Columbia?
How many days does it rain in December in Columbia?
How much does it snow in Columbia in December?
What is the month with the shortest days in Columbia?
How many hours of daylight does Columbia have in December?
When are sunrise and sunset in December in Columbia?
What is the month with the least sunshine in Columbia?
How many hours of sunshine does Columbia have in December?
What are the months with the lowest UV index in Columbia?
What is the UV index intensity in December in Columbia?
Average temperature in December
Columbia, CT
- Average high temperature in December: 39.4°F
The warmest month (with the highest average high temperature) is July (81.9°F).
The month with the lowest average high temperature is January (33.4°F).
- Average low temperature in December: 28.6°F
The month with the highest average low temperature is July (63°F).
The coldest month (with the lowest average low temperature) is January (21.6°F).
Average pressure in December
Columbia, CT
- Average pressure in December: 30.05"Hg
The month with the highest atmospheric pressure is November (30.08"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in December
Columbia, CT
- Average wind speed in December: 8.4mph
The windiest months (with the highest average wind speed) are January and March (8.8mph).
The calmest month (with the lowest average wind speed) is August (5.6mph).
Average humidity in December
Columbia, CT
- Average humidity in December: 77%
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
Columbia, CT
- Average rainfall in December: 3.46"
The wettest month (with the highest rainfall) is December (3.46").
The driest month (with the least rainfall) is September (1.73").
Average rainfall days in December
Columbia, CT
- Average rainfall days in December: 11.5 days
The month with the highest number of rainy days is May (17.1 days).
The month with the least rainy days is January (9.1 days).
Average snowfall in December
Columbia, CT
- Average snowfall in December: 2.72"
The month with the highest snowfall is March (4.41").
The months with the least snowfall are June, July, August, September and October (0").
Average snowfall days in December
Columbia, CT
- Average snowfall days in December: 5.5 days
The month with the highest number of snowfall days is January (8.3 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
Columbia, 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 4min
The month with the most sunshine is August (Average sunshine: 10h and 18min).
The month with the least sunshine is December (Average sunshine: 4h and 42min).
Average sunshine days in December
Columbia, CT
- Average sunshine days in December: 15.2 days
The month with the most sunshine days is November (17.2 days).
The month with the least sunshine days is June (10.8 days).
Average UV index in December
Columbia, 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
Columbia, CT
- Average cloud cover in December: 48
The months with the most cloud cover are February, March, May and December (Cloud cover 48).
The month with the least cloud cover is August (Cloud cover 33).
Average visibility in December
Columbia, CT
- Average visibility in December: 6mi
The months with the highest visibility are January, March, April, October, November and December (6mi).
The months with the lowest visibility are February, May, June, July, August and September (5mi).
Columbia, Connecticut, USA
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