December weather forecastSterling, CT
December
Weather in December
The first month of the winter, December, is also an icy month in Sterling, Connecticut, with temperature in the range of an average low of 29.3°F (-1.5°C) and an average high of 40.1°F (4.5°C).Temperature
The arrival of December signals a shift in temperature, down from a chilly 49.1°F (9.5°C) in November to an icy 40.1°F (4.5°C). In Sterling, an average low-temperature of 29.3°F (-1.5°C) is recorded during December nights.Humidity
In Sterling, the average relative humidity in December is 77%.Rainfall
The month with the most rainfall is December, when the rain falls for 11.2 days and typically aggregates up to 3.39" (86mm) of precipitation.Snowfall
January through May, November and December are months with snowfall. In Sterling, in December, snow falls for 4.9 days, with typically accumulated 1.97" (50mm) of snow. Throughout the year, there are 29.7 snowfall days, and 12.99" (330mm) of snow is accumulated.Daylight
December has the shortest days of the year in Sterling, Connecticut, with an average of 9h and 12min of daylight.On the first day of December, sunrise is at 6:55 am and sunset at 4:17 pm. On the last day of the month, sunrise is at 7:14 am and sunset at 4:26 pm EST.
Sunshine
The average sunshine in December in Sterling is 4.9h.UV index
January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Sterling. A UV Index value of 2, and less, symbolizes a low threat to health from unsafe exposure to UV radiation for ordinary individuals.Note: The daily maximum UV index of 2 in December interprets into the following advice:
It is important to always shield children, babies, and individuals with sensitive skin from prolonged exposure to the sun. Solar radiation is at its peak intensity during midday, so it's advisable to stay indoors or in the shade. 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. Stay alert! Snow's reflective properties can almost double the UV radiation from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Sterling, CT
- Average high temperature in December: 40.1°F
The warmest month (with the highest average high temperature) is July (80.8°F).
The month with the lowest average high temperature is January (34°F).
- Average low temperature in December: 29.3°F
The month with the highest average low temperature is July (63.3°F).
The coldest month (with the lowest average low temperature) is January (22.3°F).
Average pressure in December
Sterling, CT
- Average pressure in December: 30.04"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
Sterling, CT
- Average wind speed in December: 9mph
The windiest months (with the highest average wind speed) are January and March (9.4mph).
The calmest month (with the lowest average wind speed) is August (6.1mph).
Average humidity in December
Sterling, CT
- Average humidity in December: 77%
The months with the highest relative humidity are February, June, July and September (79%).
The month with the lowest relative humidity is April (72%).
Average rainfall in December
Sterling, CT
- Average rainfall in December: 3.39"
The wettest month (with the highest rainfall) is December (3.39").
The driest month (with the least rainfall) is September (1.73").
Average rainfall days in December
Sterling, CT
- Average rainfall days in December: 11.2 days
The month with the highest number of rainy days is July (17.7 days).
The month with the least rainy days is January (8.3 days).
Average snowfall in December
Sterling, CT
- Average snowfall in December: 1.97"
The month with the highest snowfall is March (3.62").
The months with the least snowfall are June, July, August, September and October (0").
Average snowfall days in December
Sterling, CT
- Average snowfall days in December: 4.9 days
The month with the highest number of snowfall days is February (7.7 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
Sterling, CT
- Average daylight in December: 9h and 12min
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 54min
The months with the most sunshine are July and August (Average sunshine: 10h and 18min).
The month with the least sunshine is February (Average sunshine: 4h and 48min).
Average sunshine days in December
Sterling, CT
- Average sunshine days in December: 15.6 days
The month with the most sunshine days is November (17.2 days).
The month with the least sunshine days is June (10.3 days).
Average UV index in December
Sterling, 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
Sterling, CT
- Average cloud cover in December: 47
The month with the most cloud cover is March (Cloud cover 49).
The month with the least cloud cover is August (Cloud cover 33).
Average visibility in December
Sterling, CT
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, September, October, November and December (6mi).
The months with the lowest visibility are May, June, July and August (5mi).
