December weather forecastClinton, CT
December
Weather in December
December heralds the return of winter, transforming Clinton into a winter wonderland. A notable decrease in the maximum temperature to 41.9°F (5.5°C) accompanies this transition, further reinforced by snowfall measuring up to 1.34" (34mm). The daylight hours settle at the lowest point of the year, circling around 9.2 hours. The cool sea breeze making its way through the city adds to the wintry feel. December wraps the year up in a blanket of snow, preparing the city for the new year's adventures.Temperature
The start of December signals a gentle decrease in the average high-temperature, transitioning from a fresh 50.7°F (10.4°C) in November to an icy 41.9°F (5.5°C). Throughout the December nights, Clinton encounters a low-temperature of 32.4°F (0.2°C).Humidity
In December, the average relative humidity is 75%.Rainfall
December is the month with the most rainfall. Rain falls for 13 days and accumulates 3.66" (93mm) of precipitation.Snowfall
January through May, November and December are months with snowfall. In Clinton, in December, snow falls for 4.4 days, with typically accumulated 1.34" (34mm) of snow. Throughout the year, there are 24.2 snowfall days, and 9.53" (242mm) of snow is accumulated.Ocean temperature
In Clinton, the average seawater temperature in December is 48.7°F (9.3°C).Note: Diving into 48.7°F (9.3°C) when it's under 50°F (10°C) can cause immediate cold shock symptoms, marked by hyperventilation.
Daylight
With an average of 9h and 18min of daylight, December has the shortest days of the year in Clinton, Connecticut.On the first day of December in Clinton, sunrise is at 6:57 am and sunset at 4:21 pm. On the last day of the month, sunrise is at 7:15 am and sunset at 4:31 pm EST.
Sunshine
The months with the least sunshine in Clinton are February and December, with an average of 4.8h of sunshine.UV index
January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Clinton. A UV Index reading of 2, and below, represents a minimal health vulnerability from exposure to the Sun's UV radiation for the ordinary person.Note: During December, 2 as the daily maximum UV index converts into the following advice:
Children necessitate constant protection from sunlight, unlike the majority, who can remain under the sun for about an hour without burning. When the Sun's UV radiation is most intense during midday, it's best to find shade and limit exposure. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes. Take heed! Reflection from the snow can almost amplify the Sun's UV radiation by double.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Clinton, CT
- Average high temperature in December: 41.9°F
The warmest month (with the highest average high temperature) is July (79.7°F).
The month with the lowest average high temperature is January (35.2°F).
- Average low temperature in December: 32.4°F
The month with the highest average low temperature is July (66.6°F).
The coldest month (with the lowest average low temperature) is January (25.5°F).
Average pressure in December
Clinton, 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
Clinton, CT
- Average wind speed in December: 10.6mph
The windiest month (with the highest average wind speed) is January (10.9mph).
The calmest months (with the lowest average wind speed) are July and August (7.1mph).
Average humidity in December
Clinton, CT
- Average humidity in December: 75%
The months with the highest relative humidity are May, June and July (78%).
The month with the lowest relative humidity is April (73%).
Average rainfall in December
Clinton, CT
- Average rainfall in December: 3.66"
The wettest month (with the highest rainfall) is December (3.66").
The driest month (with the least rainfall) is September (1.93").
Average rainfall days in December
Clinton, CT
- Average rainfall days in December: 13 days
The month with the highest number of rainy days is July (17 days).
The month with the least rainy days is January (9 days).
Average snowfall in December
Clinton, CT
- Average snowfall in December: 1.34"
The month with the highest snowfall is March (2.76").
The months with the least snowfall are June, July, August, September and October (0").
Average snowfall days in December
Clinton, CT
- Average snowfall days in December: 4.4 days
The month with the highest number of snowfall days is February (7 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average sea temperature in December
Clinton, CT
- Average sea temperature in December: 48.7°F
The best month for swimming (with the highest average sea temperature) is August (73°F).
The coldest month (with the lowest average sea temperature) is February (38.5°F).
Average daylight in December /
Average sunshine in December
Clinton, CT
- Average daylight in December: 9h and 18min
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 48min
The month with the most sunshine is August (Average sunshine: 10h and 36min).
The months with the least sunshine are February and December (Average sunshine: 4h and 48min).
Average sunshine days in December
Clinton, CT
- Average sunshine days in December: 14.8 days
The month with the most sunshine days is November (17.1 days).
The month with the least sunshine days is July (11.7 days).
Average UV index in December
Clinton, 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
Clinton, CT
- Average cloud cover in December: 48
The months with the most cloud cover are February and December (Cloud cover 48).
The month with the least cloud cover is August (Cloud cover 29).
Average visibility in December
Clinton, 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).
