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's arrival comes with a decrease in the average high-temperature, moving from a frosty 46.6°F (8.1°C) in November to a cold 36.5°F (2.5°C). Throughout December, an average low-temperature of 25.7°F (-3.5°C) is experienced in Mystic Grove.Humidity
In December, the average relative humidity is 80%.Rainfall
In December, the rain falls for 9.2 days. Throughout December, 2.72" (69mm) of precipitation is accumulated. Throughout the year, there are 147.4 rainfall days, and 29.76" (756mm) of precipitation is accumulated.Snowfall
January through May, October through December are months with snowfall. In December, in Mystic Grove, it is snowing for 6.9 days. Throughout December, 3.43" (87mm) of snow is accumulated. In Mystic Grove, during the entire year, snow falls for 39.9 days and aggregates up to 23.82" (605mm) of snow.Daylight
December has the shortest days of the year in Mystic Grove, with an average of 9h and 12min of daylight.On the first day of the month, sunrise is at 6:57 am and sunset at 4:16 pm. On the last day of December, in Mystic Grove, sunrise is at 7:16 am and sunset at 4:26 pm EST.
Sunshine
The average sunshine in December is 4.4h.UV index
January through March, October through December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index value of 2, and less, symbolizes a minimal health hazard from exposure to the Sun's UV radiation for the ordinary person.Note: The UV index of 2 in December translates into these instructions:
Apart from children, who require continuous protection, most can endure sun exposure for up to an hour without experiencing burns. Midday Sun has the strongest UV rays, making it crucial to limit exposure and find shade. A hat with a broad brim is indispensable, filtering out up to half of UV rays. Pay attention! The reflection of snow can enhance the Sun's UV radiation almost double.
Frequently asked questions
How cold is it in Mystic Grove in December?
What is the average humidity in December in Mystic Grove?
How much does it rain in Mystic Grove in December?
How many days does it snow in December in Mystic Grove?
What is the month with the shortest days in Mystic Grove?
What is the average length of the day in December in Mystic Grove?
When is the sunrise / sunset in December in Mystic Grove?
How many hours of sunshine does Mystic Grove have in December?
What is the month with the lowest UV index in Mystic Grove?
What is the UV index reading in December in Mystic Grove?
Average temperature in December
Mystic Grove, MA
- Average high temperature in December: 36.5°F
The warmest month (with the highest average high temperature) is July (80.8°F).
The month with the lowest average high temperature is January (30.9°F).
- Average low temperature in December: 25.7°F
The month with the highest average low temperature is July (61.3°F).
The coldest month (with the lowest average low temperature) is January (18.3°F).
Average pressure in December
Mystic Grove, MA
- Average pressure in December: 30.04"Hg
The month with the highest atmospheric pressure is November (30.07"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in December
Mystic Grove, MA
- Average wind speed in December: 8.6mph
The windiest month (with the highest average wind speed) is January (9.1mph).
The calmest month (with the lowest average wind speed) is August (5.6mph).
Average humidity in December
Mystic Grove, MA
- Average humidity in December: 80%
The month with the highest relative humidity is February (82%).
The month with the lowest relative humidity is April (73%).
Average rainfall in December
Mystic Grove, MA
- Average rainfall in December: 2.72"
The wettest months (with the highest rainfall) are October and November (2.76").
The driest month (with the least rainfall) is September (1.81").
Average rainfall days in December
Mystic Grove, MA
- Average rainfall days in December: 9.2 days
The month with the highest number of rainy days is May (16.5 days).
The month with the least rainy days is January (6.4 days).
Average snowfall in December
Mystic Grove, MA
- Average snowfall in December: 3.43"
The month with the highest snowfall is February (6.02").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Mystic Grove, MA
- Average snowfall days in December: 6.9 days
The month with the highest number of snowfall days is January (9.5 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Mystic Grove, 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 2min
The months with the most sunshine are July and August (Average sunshine: 9h and 54min).
The month with the least sunshine is February (Average sunshine: 4h and 18min).
Average sunshine days in December
Mystic Grove, MA
- Average sunshine days in December: 16.1 days
The month with the most sunshine days is November (17.2 days).
The month with the least sunshine days is April (12.8 days).
Average UV index in December
Mystic Grove, MA
- Average UV index in December: 2
The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January, February, March, October, November and December (UV index 2).
Average cloud cover in December
Mystic Grove, MA
- Average cloud cover in December: 51
The month with the most cloud cover is March (Cloud cover 53).
The month with the least cloud cover is August (Cloud cover 38).
Average visibility in December
Mystic Grove, MA
- Average visibility in December: 6mi
The months with the highest visibility are April and December (6mi).
The months with the lowest visibility are January, February, March, May, June, July, August, September, October and November (5mi).
Mystic Grove, Massachusetts, USA
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