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
The shift from November to December includes a minor decrease in the average high-temperature, lightly dropping from a chilly 45.5°F (7.5°C) to a cold 37°F (2.8°C). An average low-temperature of 28.4°F (-2°C) is witnessed throughout the month of December, a mere drop from the daytime peak.Humidity
In December, the average relative humidity in South Thomaston is 77%.Rainfall
The month with the most rainfall is December, when the rain falls for 11.3 days and typically aggregates up to 3.35" (85mm) of precipitation.Snowfall
January through April, November and December are months with snowfall. In South Thomaston, Maine, in December, during 6.5 snowfall days, 1.81" (46mm) of snow is typically accumulated. In South Thomaston, during the entire year, snow falls for 33.1 days and aggregates up to 12.36" (314mm) of snow.Ocean temperature
In December, the average ocean temperature is 45.1°F (7.3°C).Note: Swimming in 45.1°F (7.3°C) is considered dangerous. Unprotected immersion in temperatures below 50°F (10°C) causes quickly maximum intensity cold shock with hyperventilation.
Daylight
The month with the shortest days is December, with an average of 9h and 0min of daylight.On the first day of the month, sunrise is at 6:52 am and sunset at 3:59 pm. On the last day of December, sunrise is at 7:11 am and sunset at 4:08 pm EST.
Sunshine
With an average of 4.5h of sunshine, December has the least sunshine of the year.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 reading of 2, and below, represents a minimal health hazard from exposure to the Sun's UV radiation for ordinary individuals.Note: In December, a daily maximum UV index of 2 leads to the following instructions:
Children must always have sun protection, unlike most people, who can tolerate up to an hour in the sun without any burns. Avoiding the Sun's peak radiation during midday hours is essential for health and safety. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days. Be informed! The Sun's UV radiation can be nearly doubled due to the reflection from snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is it in South Thomaston in December?
What is the average humidity in December in South Thomaston?
What is the wettest month in South Thomaston?
How much does it rain in South Thomaston in December?
How many days does it snow in December in South Thomaston?
What is the ocean temperature in December in South Thomaston?
What is the month with the shortest days in South Thomaston?
What is the average length of the day in December in South Thomaston?
When is the sunrise / sunset in December in South Thomaston?
What is the month with the least sunshine in South Thomaston?
How long on average sun shines in December in South Thomaston?
When is the lowest UV index in South Thomaston?
How high is the UV index in December in South Thomaston?
Average temperature in December
South Thomaston, ME
- Average high temperature in December: 37°F
The warmest month (with the highest average high temperature) is August (68.7°F).
The month with the lowest average high temperature is January (31.8°F).
- Average low temperature in December: 28.4°F
The month with the highest average low temperature is August (60.6°F).
The coldest month (with the lowest average low temperature) is January (22.1°F).
Average pressure in December
South Thomaston, ME
- Average pressure in December: 30"Hg
The month with the highest atmospheric pressure is September (30.04"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in December
South Thomaston, ME
- Average wind speed in December: 14.4mph
The windiest month (with the highest average wind speed) is January (14.9mph).
The calmest months (with the lowest average wind speed) are July and August (8.2mph).
Average humidity in December
South Thomaston, ME
- Average humidity in December: 77%
The month with the highest relative humidity is July (85%).
The month with the lowest relative humidity is November (75%).
Average rainfall in December
South Thomaston, ME
- Average rainfall in December: 3.35"
The wettest month (with the highest rainfall) is December (3.35").
The driest month (with the least rainfall) is September (1.81").
Average rainfall days in December
South Thomaston, ME
- Average rainfall days in December: 11.3 days
The month with the highest number of rainy days is April (15.8 days).
The month with the least rainy days is January (7.9 days).
Average snowfall in December
South Thomaston, ME
- Average snowfall in December: 1.81"
The month with the highest snowfall is January (2.83").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in December
South Thomaston, ME
- Average snowfall days in December: 6.5 days
The month with the highest number of snowfall days is January (8.5 days).
The months with the least snowfall days are June, July, August, September and October (0 days).
Average sea temperature in December
South Thomaston, ME
- Average sea temperature in December: 45°F
The best month for swimming (with the highest average sea temperature) is August (60.4°F).
The coldest month (with the lowest average sea temperature) is March (37.8°F).
Average daylight in December /
Average sunshine in December
South Thomaston, 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 3min
The month with the most sunshine is August (Average sunshine: 10h and 30min).
The month with the least sunshine is December (Average sunshine: 4h and 30min).
Average sunshine days in December
South Thomaston, ME
- Average sunshine days in December: 12.3 days
The month with the most sunshine days is September (18 days).
The month with the least sunshine days is April (11.5 days).
Average UV index in December
South Thomaston, 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, November and December (UV index 2).
Average cloud cover in December
South Thomaston, ME
- Average cloud cover in December: 51
The month with the most cloud cover is February (Cloud cover 52).
The month with the least cloud cover is August (Cloud cover 31).
Average visibility in December
South Thomaston, ME
- 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).
South Thomaston, Maine, USA
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