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
Onset of December witnesses a reduction in the average high-temperature, falling from a chilly 48°F (8.9°C) in November to a wintry 37.6°F (3.1°C). In Three Rivers, December is marked by an average low-temperature of 25.9°F (-3.4°C).Humidity
In Three Rivers, Massachusetts, the average relative humidity in December is 78%.Rainfall
The month with the most rainfall in Three Rivers is December, when the rain falls for 10.4 days and typically aggregates up to 2.91" (74mm) of precipitation.Snowfall
January through May, October through December are months with snowfall. In Three Rivers, in December, snow falls for 5.1 days, with typically accumulated 3.35" (85mm) of snow. Throughout the year, in Three Rivers, there are 33.4 snowfall days, and 18.43" (468mm) of snow is accumulated.Daylight
The month with the shortest days in Three Rivers is December, with an average of 9h and 12min of daylight.On the first day of the month, sunrise is at 6:59 am and sunset at 4:18 pm. On the last day of December, in Three Rivers, sunrise is at 7:17 am and sunset at 4:27 pm EST.
Sunshine
The average sunshine in December in Three Rivers is 4.8h.UV index
The months with the lowest UV index in Three Rivers 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 health risk from unsafe exposure to UV radiation for average individuals.Note: A maximum high UV index of 2 in December translates into the following recommendations:
Most people can stay in the Sun for up to 1 hour without burning, apart from children that always must be protected from sun exposure. Around midday, solar radiation is most harmful; hence, exposure should be limited. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Keep in mind! Snow's reflective quality can nearly double the intensity of the Sun's UV radiation.
Frequently asked questions
How cold is it in Three Rivers in December?
What is the average humidity in December in Three Rivers?
What is the rainiest month in Three Rivers?
How much does it rain in Three Rivers in December?
How much does it snow in Three Rivers in December?
What is the month with the shortest days in Three Rivers?
How many hours of daylight does Three Rivers have in December?
When are sunrise and sunset in December in Three Rivers?
How long on average sun shines in December in Three Rivers?
What are the months with the lowest UV index in Three Rivers?
What is the UV index reading in December in Three Rivers?
Average temperature in December
Three Rivers, MA
- Average high temperature in December: 37.6°F
The warmest month (with the highest average high temperature) is July (82.8°F).
The month with the lowest average high temperature is January (31.6°F).
- Average low temperature in December: 25.9°F
The month with the highest average low temperature is July (62.1°F).
The coldest month (with the lowest average low temperature) is January (19°F).
Average pressure in December
Three Rivers, MA
- 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
Three Rivers, MA
- Average wind speed in December: 7.6mph
The windiest month (with the highest average wind speed) is March (8mph).
The calmest month (with the lowest average wind speed) is August (5mph).
Average humidity in December
Three Rivers, MA
- Average humidity in December: 78%
The month with the highest relative humidity is February (81%).
The month with the lowest relative humidity is April (71%).
Average rainfall in December
Three Rivers, MA
- Average rainfall in December: 2.91"
The wettest month (with the highest rainfall) is December (2.91").
The driest month (with the least rainfall) is September (1.57").
Average rainfall days in December
Three Rivers, MA
- Average rainfall days in December: 10.4 days
The month with the highest number of rainy days is June (16.1 days).
The month with the least rainy days is January (7.8 days).
Average snowfall in December
Three Rivers, MA
- Average snowfall in December: 3.35"
The month with the highest snowfall is February (5.2").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Three Rivers, MA
- Average snowfall days in December: 5.1 days
The months with the highest number of snowfall days are January and February (8.4 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Three Rivers, MA
- Average daylight in December: 9h and 1min
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 5min
The month with the most sunshine is August (Average sunshine: 10h and 24min).
The month with the least sunshine is February (Average sunshine: 4h and 36min).
Average sunshine days in December
Three Rivers, MA
- Average sunshine days in December: 16 days
The month with the most sunshine days is November (17.3 days).
The month with the least sunshine days is June (11.6 days).
Average UV index in December
Three Rivers, MA
- 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
Three Rivers, MA
- Average cloud cover in December: 47
The month with the most cloud cover is February (Cloud cover 49).
The month with the least cloud cover is August (Cloud cover 33).
Average visibility in December
Three Rivers, MA
- Average visibility in December: 6mi
The months with the highest visibility are April, October, November and December (6mi).
The months with the lowest visibility are January, February, March, May, June, July, August and September (5mi).
Three Rivers, Massachusetts, USA
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