December weather forecastGlen Grove Annex, MA
December
Weather in December
The first month of the winter, December, is still a cold month in Glen Grove Annex, Massachusetts, with an average temperature fluctuating between 25.7°F (-3.5°C) and 36.5°F (2.5°C).Temperature
Glen Grove Annex's progression into December includes a drop in the average high-temperature, from a frosty 46.6°F (8.1°C) in November to an icy 36.5°F (2.5°C). Glen Grove Annex experiences a steady low-temperature of 25.7°F (-3.5°C) throughout December.Humidity
The average relative humidity in December is 80%.Rainfall
In Glen Grove Annex, in December, it is raining for 9.2 days, with typically 2.72" (69mm) of accumulated precipitation. 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 Glen Grove Annex, during December, snow falls for 6.9 days and regularly aggregates up to 3.43" (87mm) of snow. Throughout the year, there are 39.9 snowfall days, and 23.82" (605mm) of snow is accumulated.Daylight
With an average of 9h and 12min of daylight, December has the shortest days of the year.On the first day of December in Glen Grove Annex, sunrise is at 6:57 am and sunset at 4:16 pm. On the last day of the month, sunrise is at 7:16 am and sunset at 4:26 pm EST.
Sunshine
In December, the average sunshine 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 of 2, and less, symbolizes a minimal health vulnerability from unprotected exposure to Sun's UV rays for average individuals.Note: In December, the UV index of 2 transforms into the following advice:
Although prolonged sun exposure does not typically bother most people, children, babies, and those with sensitive skin should always have protection. To avoid the Sun's strongest rays, limit exposure around the mid-day period. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Take to heart! Snow reflection can almost magnify the Sun's UV radiation twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
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 12min
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 24min
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).
