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 indicates a shift in the average high-temperature, from November's chilly 46.6°F (8.1°C) to a cold 36.5°F (2.5°C). In the month of December, the average temperature in Glen Grove Annex dips to a freezing cold 25.7°F (-3.5°C) during the night.Humidity
In Glen Grove Annex, the average relative humidity in December is 80%.Rainfall
In Glen Grove Annex, during December, the rain falls for 9.2 days and regularly aggregates up to 2.72" (69mm) of precipitation. Throughout the year, in Glen Grove Annex, Massachusetts, there are 147.4 rainfall days, and 29.76" (756mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through May, October through December. In Glen Grove Annex, in December, snow falls for 6.9 days, with typically accumulated 3.43" (87mm) of snow. In Glen Grove Annex, during the entire year, snow falls for 39.9 days and aggregates up to 23.82" (605mm) 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 6:57 am and sunset at 4:16 pm. On the last day of December, in Glen Grove Annex, sunrise is at 7:16 am and sunset at 4:26 pm EST.
Sunshine
In Glen Grove Annex, the average sunshine in December is 4.4h.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 value of 2, and less, symbolizes a low threat to health from unsafe exposure to UV radiation for the average person.Note: A daily maximum UV index of 2 in December translates into the following instructions:
Most people face no serious problems with extended sun exposure, but those with fair skin, infants, and children always need protection. Limiting sun exposure during midday hours helps in reducing the harmful effects of UV radiation. Employ a wide-brim hat for potent defense against up to 50% of UV rays. Be attentive! The reflective property of snow can nearly double the Sun's UV radiation.
Frequently asked questions
How cold is it in Glen Grove Annex in December?
What is the average humidity in December in Glen Grove Annex?
How much does it rain in Glen Grove Annex in December?
How many days does it snow in December in Glen Grove Annex?
What is the month with the shortest days in Glen Grove Annex?
What is the average length of the day in December in Glen Grove Annex?
When is the sunrise / sunset in December in Glen Grove Annex?
How many hours of sunshine does Glen Grove Annex have in December?
What is the month with the lowest UV index in Glen Grove Annex?
What is the UV index reading in December in Glen Grove Annex?
Average temperature in December
Glen Grove Annex, 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
Glen Grove Annex, 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
Glen Grove Annex, 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
Glen Grove Annex, 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
Glen Grove Annex, 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
Glen Grove Annex, 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
Glen Grove Annex, 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
Glen Grove Annex, 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
Glen Grove Annex, 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
Glen Grove Annex, 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
Glen Grove Annex, 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
Glen Grove Annex, 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
Glen Grove Annex, 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).
Glen Grove Annex, Massachusetts, USA
Weather forecast for your location
2. Allow the app to use your location
