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
As December commences, the average high-temperature shows a reduction, transitioning from a cool 50°F (10°C) in November to an icy 40.8°F (4.9°C). During the month of December, Wilton's average nighttime temperature closely mirrors its daytime counterpart, at a freezing cold 31.8°F (-0.1°C).Humidity
February, May, June, October and December, with an average relative humidity of 76%, are the most humid months.Rainfall
December is the month with the most rainfall. Rain falls for 12.3 days and accumulates 4.17" (106mm) of precipitation.Snowfall
Months with snowfall are January through April, November and December. In Wilton, in December, snow falls for 5.1 days, with typically accumulated 2.6" (66mm) of snow. Throughout the year, there are 28.5 snowfall days, and 11.65" (296mm) of snow is accumulated.Daylight
With an average of 9h and 18min of daylight, December has the shortest days of the year.On the first day of December, sunrise is at 7:00 am and sunset at 4:25 pm. On the last day of the month, sunrise is at 7:19 am and sunset at 4:35 pm EST.
Sunshine
The average sunshine in December is 4.8h.UV index
The months with the lowest UV index in Wilton are January through March, November and December, with an average maximum UV index of 2. A UV Index estimate of 2, and below, represents a low threat to health from unsafe exposure to UV radiation for average individuals.Note: The maximum UV index of 2 during December translates into these guidelines:
Children, infants, and individuals with sensitive skin should be constantly protected from extended sun exposure. Avoiding the Sun's peak radiation during midday hours is essential for health and safety. Consider a wide-brim hat essential for effective sun defense covering your face, neck, and eyes. Mind you! Snow reflection can increase the intensity of the Sun's UV radiation nearly twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is December?
What are the most humid months?
What is the average humidity in December?
What is the wettest month?
How many days does it rain in December?
How much does it snow in December?
What is the month with the shortest days?
How many hours of daylight does Wilton have in December?
What time are sunrise and sunset in December in Wilton?
How long on average sun shines in December?
What are the months with the lowest UV index in Wilton?
What is the UV index intensity in December?
Average temperature in December
Wilton, CT
- Average high temperature in December: 40.8°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 (35.1°F).
- Average low temperature in December: 31.8°F
The month with the highest average low temperature is July (67.6°F).
The coldest month (with the lowest average low temperature) is January (25°F).
Average pressure in December
Wilton, 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
Wilton, CT
- Average wind speed in December: 9.2mph
The windiest month (with the highest average wind speed) is January (9.5mph).
The calmest month (with the lowest average wind speed) is July (6.1mph).
Average humidity in December
Wilton, CT
- Average humidity in December: 76%
The months with the highest relative humidity are February, May, June, October and December (76%).
The month with the lowest relative humidity is April (72%).
Average rainfall in December
Wilton, CT
- Average rainfall in December: 4.17"
The wettest month (with the highest rainfall) is December (4.17").
The driest month (with the least rainfall) is January (2.44").
Average rainfall days in December
Wilton, CT
- Average rainfall days in December: 12.3 days
The month with the highest number of rainy days is July (18.1 days).
The month with the least rainy days is January (8.6 days).
Average snowfall in December
Wilton, CT
- Average snowfall in December: 2.6"
The month with the highest snowfall is February (3.46").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in December
Wilton, CT
- Average snowfall days in December: 5.1 days
The month with the highest number of snowfall days is February (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
Wilton, CT
- Average daylight in December: 9h and 2min
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 18min).
- Average sunshine in December: 4h and 5min
The month with the most sunshine is July (Average sunshine: 10h and 30min).
The month with the least sunshine is February (Average sunshine: 4h and 42min).
Average sunshine days in December
Wilton, CT
- Average sunshine days in December: 14.5 days
The month with the most sunshine days is January (17.3 days).
The month with the least sunshine days is June (10.1 days).
Average UV index in December
Wilton, 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
Wilton, CT
- Average cloud cover in December: 48
The months with the most cloud cover are February, March and December (Cloud cover 48).
The month with the least cloud cover is August (Cloud cover 30).
Average visibility in December
Wilton, CT
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Wilton, Connecticut, USA
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