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
December suggests a modest reduction in the average high-temperature, shifting from a chilly 44.6°F (7°C) in November to a wintry 33.3°F (0.7°C). An average low-temperature of 23.2°F (-4.9°C) marks the nights throughout December.Humidity
In South Casco, the average relative humidity in December is 79%.Rainfall
In South Casco, Maine, during December, the rain falls for 5.9 days and regularly aggregates up to 1.34" (34mm) of precipitation. In South Casco, during the entire year, the rain falls for 121.1 days and collects up to 16.3" (414mm) of precipitation.Snowfall
Months with snowfall are January through May, November and December. In December, it is snowing for 5 days. Throughout December, 2.99" (76mm) of snow is accumulated. In South Casco, during the entire year, snow falls for 31.3 days and aggregates up to 12.76" (324mm) of snow.Daylight
With an average of 9h and 0min of daylight, December has the shortest days of the year.On the first day of the month, sunrise is at 6:57 am and sunset at 4:05 pm. On the last day of December, sunrise is at 7:16 am and sunset at 4:14 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 are January through March, October through December, with an average maximum UV index of 2. A UV Index of 2, and less, symbolizes a low health risk from exposure to the Sun's UV radiation for the average person.Note: The daily high UV index of 2 in December translates into this advice:
While most people can stay under the sun for an hour without burning, children must always be guarded against sun exposure. Sun's radiation is most powerful around mid-day, so it's best to limit outdoor activities during this time. Arm yourself against UV rays' harm with protective apparel and UV-filtering shades. Mark this! Snow reflection can nearly double the UV radiation intensity from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is December?
What is the average humidity in December in South Casco?
How many days does it rain in December?
How many days does it snow in December?
What is the month with the shortest days?
What is the average length of the day in December?
When are sunrise and sunset in December?
What are the months with the least sunshine?
How many hours of sunshine does South Casco have in December?
What are the months with the lowest UV index?
How high is the UV index in December?
Average temperature in December
South Casco, ME
- Average high temperature in December: 33.3°F
The warmest month (with the highest average high temperature) is July (77.5°F).
The month with the lowest average high temperature is January (27.5°F).
- Average low temperature in December: 23.2°F
The month with the highest average low temperature is July (58.5°F).
The coldest month (with the lowest average low temperature) is January (14.4°F).
Average pressure in December
South Casco, ME
- Average pressure in December: 30.02"Hg
The months with the highest atmospheric pressure are September and November (30.05"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in December
South Casco, ME
- Average wind speed in December: 7mph
The windiest month (with the highest average wind speed) is January (7.6mph).
The calmest month (with the lowest average wind speed) is August (5mph).
Average humidity in December
South Casco, ME
- Average humidity in December: 79%
The months with the highest relative humidity are January and February (83%).
The month with the lowest relative humidity is November (76%).
Average rainfall in December
South Casco, ME
- Average rainfall in December: 1.34"
The wettest months (with the highest rainfall) are June and October (1.77").
The driest month (with the least rainfall) is September (0.87").
Average rainfall days in December
South Casco, ME
- Average rainfall days in December: 5.9 days
The months with the highest number of rainy days are June and July (14.3 days).
The month with the least rainy days is February (4.4 days).
Average snowfall in December
South Casco, ME
- Average snowfall in December: 2.99"
The month with the highest snowfall is February (3.35").
The months with the least snowfall are June, July, August, September and October (0").
Average snowfall days in December
South Casco, ME
- Average snowfall days in December: 5 days
The month with the highest number of snowfall days is February (7.9 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
South Casco, ME
- Average daylight in December: 9h and 0min
The month with the longest days is June (Average daylight: 15h and 24min).
The month with the shortest days is December (Average daylight: 9h and 0min).
- Average sunshine in December: 4h and 5min
The month with the most sunshine is August (Average sunshine: 10h and 18min).
The months with the least sunshine are February and December (Average sunshine: 4h and 48min).
Average sunshine days in December
South Casco, ME
- Average sunshine days in December: 20.5 days
The month with the most sunshine days is January (21.3 days).
The month with the least sunshine days is July (13.6 days).
Average UV index in December
South Casco, ME
- Average UV index in December: 2
The months with the highest UV index are June, July and August (UV index 5).
The months with the lowest UV index are January, February, March, October, November and December (UV index 2).
Average cloud cover in December
South Casco, ME
- Average cloud cover in December: 48
The months with the most cloud cover are February and March (Cloud cover 50).
The months with the least cloud cover are August and September (Cloud cover 34).
Average visibility in December
South Casco, ME
- Average visibility in December: 6mi
The months with the highest visibility are January, March, April, October, November and December (6mi).
The months with the lowest visibility are February, May, June, July, August and September (5mi).
South Casco, Maine, USA
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