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
With the beginning of December, the average high-temperature shows a decrease, transitioning from a chilly 46.6°F (8.1°C) in November to a wintry 36.7°F (2.6°C). West Cornwall, during December nights, observes an average temperature of 25.7°F (-3.5°C).Humidity
The average relative humidity in December in West Cornwall is 81%.Rainfall
In West Cornwall, in December, it is raining for 10.9 days, with typically 3.35" (85mm) of accumulated precipitation. In West Cornwall, during the entire year, the rain falls for 160.5 days and collects up to 33.86" (860mm) of precipitation.Snowfall
Months with snowfall are January through May, October through December. In West Cornwall, during December, snow falls for 7.1 days and regularly aggregates up to 3.7" (94mm) of snow. Throughout the year, there are 40.2 snowfall days, and 20.39" (518mm) of snow is accumulated.Daylight
With an average of 9h and 12min of daylight, December has the shortest days of the year in West Cornwall, Connecticut.On the first day of December, sunrise is at 7:02 am and sunset at 4:23 pm. On the last day of the month, sunrise is at 7:20 am and sunset at 4:32 pm EST.
Sunshine
The average sunshine in December in West Cornwall is 4.5h.UV index
January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index in West Cornwall. A UV Index reading of 2, and below, represents a minimal health vulnerability from unsafe exposure to UV radiation for ordinary individuals.Note: The maximum daily UV index, 2 in December, converts into the following recommendations:
While most can endure approximately an hour in the sun without burning, children always require protection from sunlight. To guard against the harmful effects of the Sun, minimize exposure during midday. A hat with a generous brim can prevent nearly 50% of UV rays from reaching your eyes. Guard yourself! Snow reflection can almost double the UV radiation from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is it in West Cornwall in December?
What is the average humidity in December in West Cornwall?
How much does it rain in West Cornwall in December?
How many days does it snow in December in West Cornwall?
What is the month with the shortest days in West Cornwall?
What is the average length of the day in December in West Cornwall?
What time are sunrise and sunset in December in West Cornwall?
How long on average sun shines in December in West Cornwall?
What is the month with the lowest UV index in West Cornwall?
What is the UV index reading in December in West Cornwall?
Average temperature in December
West Cornwall, CT
- Average high temperature in December: 36.7°F
The warmest month (with the highest average high temperature) is July (81.1°F).
The month with the lowest average high temperature is January (30.9°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 (18.9°F).
Average pressure in December
West Cornwall, 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
West Cornwall, CT
- Average wind speed in December: 7.5mph
The windiest months (with the highest average wind speed) are January and March (8mph).
The calmest months (with the lowest average wind speed) are July and August (5mph).
Average humidity in December
West Cornwall, CT
- Average humidity in December: 81%
The month with the highest relative humidity is February (82%).
The month with the lowest relative humidity is April (74%).
Average rainfall in December
West Cornwall, CT
- Average rainfall in December: 3.35"
The wettest month (with the highest rainfall) is July (3.54").
The driest month (with the least rainfall) is January (2.17").
Average rainfall days in December
West Cornwall, CT
- Average rainfall days in December: 10.9 days
The month with the highest number of rainy days is July (17.9 days).
The month with the least rainy days is January (7.7 days).
Average snowfall in December
West Cornwall, CT
- Average snowfall in December: 3.7"
The month with the highest snowfall is February (5.16").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
West Cornwall, CT
- Average snowfall days in December: 7.1 days
The month with the highest number of snowfall days is February (10.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
West Cornwall, 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: 10h and 6min).
The month with the least sunshine is February (Average sunshine: 4h and 12min).
Average sunshine days in December
West Cornwall, CT
- Average sunshine days in December: 14.8 days
The month with the most sunshine days is January (16.8 days).
The month with the least sunshine days is June (10.8 days).
Average UV index in December
West Cornwall, 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
West Cornwall, CT
- Average cloud cover in December: 52
The month with the most cloud cover is February (Cloud cover 53).
The months with the least cloud cover are July and August (Cloud cover 37).
Average visibility in December
West Cornwall, CT
- Average visibility in December: 5mi
The months with the highest visibility are April and November (6mi).
The months with the lowest visibility are January, February, March, May, June, July, August, September, October and December (5mi).
West Cornwall, Connecticut, USA
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