December weather forecastPlymouth, CT
December
Weather in December
The first month of the winter, December, is also an icy month in Plymouth, Connecticut, with temperature in the range of an average low of 27.7°F (-2.4°C) and an average high of 38.3°F (3.5°C).Temperature
Plymouth's transition into December involves a shift in temperature, receding from a chilly 48.4°F (9.1°C) in November to a wintry 38.3°F (3.5°C). Throughout the month of December, Plymouth witnesses an average temperature of 27.7°F (-2.4°C).Humidity
In Plymouth, the average relative humidity in December is 79%.Rainfall
The month with the most rainfall is December, when the rain falls for 11.7 days and typically aggregates up to 3.74" (95mm) of precipitation.Snowfall
January through May, October through December are months with snowfall. In Plymouth, in December, snow falls for 6.4 days, with typically accumulated 3.23" (82mm) of snow. In Plymouth, during the entire year, snow falls for 33.9 days and aggregates up to 18.43" (468mm) of snow.Daylight
The month with the shortest days is December, with an average of 9h and 12min of daylight.On the first day of the month, sunrise is at 7:00 am and sunset at 4:22 pm. On the last day of December, sunrise is at 7:19 am and sunset at 4:31 pm EST.
Sunshine
In Plymouth, Connecticut, the average sunshine in December is 4.7h.UV index
The months with the lowest UV index 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 health risk from exposure to the Sun's UV radiation for the ordinary person.Note: The maximum UV index, 2 during December, leads to the following recommendations:
Sun exposure does not present considerable issues for many, yet infants, fair-skinned people, and children necessitate constant protection. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. Wearing a wide-brim hat can block approximately 50% of UV radiation, protecting the eyes. Note this! The Sun's UV radiation can nearly be doubled by the reflection off snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Plymouth, CT
- Average high temperature in December: 38.3°F
The warmest month (with the highest average high temperature) is July (82.4°F).
The month with the lowest average high temperature is January (32.5°F).
- Average low temperature in December: 27.7°F
The month with the highest average low temperature is July (63.1°F).
The coldest month (with the lowest average low temperature) is January (20.7°F).
Average pressure in December
Plymouth, 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
Plymouth, CT
- Average wind speed in December: 8mph
The windiest month (with the highest average wind speed) is January (8.4mph).
The calmest month (with the lowest average wind speed) is August (5.2mph).
Average humidity in December
Plymouth, CT
- Average humidity in December: 79%
The month with the highest relative humidity is February (80%).
The month with the lowest relative humidity is April (72%).
Average rainfall in December
Plymouth, CT
- Average rainfall in December: 3.74"
The wettest month (with the highest rainfall) is December (3.74").
The driest month (with the least rainfall) is September (2.24").
Average rainfall days in December
Plymouth, CT
- Average rainfall days in December: 11.7 days
The months with the highest number of rainy days are May and July (18.3 days).
The month with the least rainy days is February (9.3 days).
Average snowfall in December
Plymouth, CT
- Average snowfall in December: 3.23"
The month with the highest snowfall is February (5.12").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Plymouth, CT
- Average snowfall days in December: 6.4 days
The month with the highest number of snowfall days is February (9.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Plymouth, 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 42min
The months with the most sunshine are July and August (Average sunshine: 10h and 12min).
The month with the least sunshine is February (Average sunshine: 4h and 30min).
Average sunshine days in December
Plymouth, CT
- Average sunshine days in December: 14.9 days
The month with the most sunshine days is January (16.7 days).
The month with the least sunshine days is June (10 days).
Average UV index in December
Plymouth, 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
Plymouth, CT
- Average cloud cover in December: 49
The months with the most cloud cover are February and March (Cloud cover 50).
The month with the least cloud cover is August (Cloud cover 35).
Average visibility in December
Plymouth, CT
- Average visibility in December: 6mi
The months with the highest visibility are January, April, October, November and December (6mi).
The months with the lowest visibility are February, March, May, June, July, August and September (5mi).
