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 sea temperature 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 arrives, Southport's weather displays a decrease in high-temperatures, transitioning from November's cool 50.9°F (10.5°C) to a wintry 41.9°F (5.5°C). Southport observes an average low-temperature of 33.3°F (0.7°C) during the slightly cooler nights of December.Humidity
In Southport, Connecticut, the average relative humidity in December is 75%.Rainfall
The month with the most rainfall is December, when the rain falls for 12.7 days and typically aggregates up to 4.21" (107mm) of precipitation.Snowfall
Months with snowfall in Southport are January through April, November and December. In Southport, in December, during 4.3 snowfall days, 1.81" (46mm) of snow is typically accumulated. Throughout the year, there are 24.9 snowfall days, and 9.41" (239mm) of snow is accumulated.Ocean temperature
In Southport, the average seawater temperature in December is 48°F (8.9°C).Note: Danger awaits those who swim in 48°F (8.9°C) without protection. Falling below 50°F (10°C) means intense cold shock and hyperventilation.
Daylight
With an average of 9h and 18min of daylight, December has the shortest days of the year.On the first day of December in Southport, sunrise is at 6:59 am and sunset at 4:25 pm. On the last day of the month, sunrise is at 7:18 am and sunset at 4:34 pm EST.
Sunshine
The months with the least sunshine are February and December, with an average of 4.8h of sunshine.UV index
The months with the lowest UV index in Southport are January through March, November and December, with an average maximum UV index of 2. A UV Index reading of 2, and below, represents a low threat to health from unprotected exposure to Sun's UV rays for the ordinary person.Note: In December, the maximum UV index of 2 suggests these recommendations:
Prolonged exposure to sunlight rarely troubles the majority, but constant protection is vital for babies, children, and fair-skinned people. Solar radiation is at its peak intensity during midday, so it's advisable to stay indoors or in the shade. A hat with a generous brim can prevent nearly 50% of UV rays from reaching your eyes. On your guard! Snow's reflection can almost double the intensity of the Sun's UV radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Is it cold in Southport during December?
What is the average humidity in December in Southport?
What is the rainiest month in Southport?
How many days does it rain in December in Southport?
How many days does it snow in December in Southport?
How cold is the water in December in Southport?
What is the month with the shortest days in Southport?
How many hours of daylight does Southport have in December?
When are sunrise and sunset in December in Southport?
What are the months with the least sunshine in Southport?
How long on average sun shines in December in Southport?
What is the month with the lowest UV index in Southport?
How high is the UV index in December in Southport?
Average temperature in December
Southport, CT
- Average high temperature in December: 41.9°F
The warmest month (with the highest average high temperature) is July (81°F).
The month with the lowest average high temperature is January (36.1°F).
- Average low temperature in December: 33.3°F
The month with the highest average low temperature is July (68.5°F).
The coldest month (with the lowest average low temperature) is January (26.6°F).
Average pressure in December
Southport, 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
Southport, CT
- Average wind speed in December: 10.2mph
The windiest month (with the highest average wind speed) is January (10.5mph).
The calmest months (with the lowest average wind speed) are July and August (6.8mph).
Average humidity in December
Southport, CT
- Average humidity in December: 75%
The months with the highest relative humidity are May and June (76%).
The months with the lowest relative humidity are April and November (72%).
Average rainfall in December
Southport, CT
- Average rainfall in December: 4.21"
The wettest month (with the highest rainfall) is December (4.21").
The driest month (with the least rainfall) is January (2.48").
Average rainfall days in December
Southport, CT
- Average rainfall days in December: 12.7 days
The month with the highest number of rainy days is July (18.1 days).
The month with the least rainy days is January (9.4 days).
Average snowfall in December
Southport, CT
- Average snowfall in December: 1.81"
The month with the highest snowfall is March (2.8").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in December
Southport, CT
- Average snowfall days in December: 4.3 days
The month with the highest number of snowfall days is January (7.1 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average sea temperature in December
Southport, CT
- Average sea temperature in December: 48.1°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 (39°F).
Average daylight in December /
Average sunshine in December
Southport, 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 36min).
The months with the least sunshine are February and December (Average sunshine: 4h and 48min).
Average sunshine days in December
Southport, CT
- Average sunshine days in December: 14.7 days
The month with the most sunshine days is November (17.1 days).
The month with the least sunshine days is June (11.2 days).
Average UV index in December
Southport, 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
Southport, CT
- Average cloud cover in December: 48
The month with the most cloud cover is December (Cloud cover 48).
The month with the least cloud cover is August (Cloud cover 29).
Average visibility in December
Southport, 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).
Southport, Connecticut, USA
Weather forecast for your location
2. Allow the app to use your location