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
The transition into December is accompanied by a temperature decrease, with the average high-temperature shifting from a frosty 48.9°F (9.4°C) in November to a cold 39°F (3.9°C). During December, Glastonbury experiences an average low-temperature of 28.4°F (-2°C) at night.Humidity
In December, the average relative humidity in Glastonbury is 77%.Rainfall
The month with the most rainfall is December, when the rain falls for 11.3 days and typically aggregates up to 3.19" (81mm) of precipitation.Snowfall
Months with snowfall are January through May, November and December. In Glastonbury, during December, snow falls for 5.3 days and regularly aggregates up to 2.83" (72mm) of snow. In Glastonbury, Connecticut, during the entire year, snow falls for 29.1 days and aggregates up to 15.63" (397mm) of snow.Daylight
The month with the shortest days in Glastonbury is December, with an average of 9h and 12min of daylight.On the first day of the month, sunrise is at 6:58 am and sunset at 4:20 pm. On the last day of December, sunrise is at 7:17 am and sunset at 4:29 pm EST.
Sunshine
In Glastonbury, Connecticut, the average sunshine in December is 4.8h.UV index
December is the month with the lowest UV index in Glastonbury, with an average maximum UV index of 1. A UV Index reading of 2, and below, represents a minimal health hazard from unsafe exposure to UV radiation for the ordinary person.Note: An average UV index of 1 in December transforms into this advice:
Most individuals face no major issues with lengthy exposure to the sun, but children, infants, and individuals with fair skin always require protection. The Sun is at its harshest during midday; protect yourself by staying in shaded areas and minimizing exposure. Using UVA and UVB-protective sunglasses and sun-protective clothing is effective against UV radiation. Consider carefully! The reflective quality of snow can almost double the intensity of the Sun's UV radiation.
Frequently asked questions
Is December cold in Glastonbury?
What is the average humidity in December in Glastonbury?
What is the rainiest month in Glastonbury?
How much does it rain in Glastonbury in December?
How many days does it snow in December in Glastonbury?
What is the month with the shortest days in Glastonbury?
How many hours of daylight does Glastonbury have in December?
What time are sunrise and sunset in December in Glastonbury?
How many hours of sunshine does Glastonbury have in December?
What is the month with the lowest UV index in Glastonbury?
How high is the UV index in December in Glastonbury?
Average temperature in December
Glastonbury, CT
- Average high temperature in December: 39°F
The warmest month (with the highest average high temperature) is July (83.1°F).
The month with the lowest average high temperature is January (33.4°F).
- Average low temperature in December: 28.4°F
The month with the highest average low temperature is July (63.7°F).
The coldest month (with the lowest average low temperature) is January (21.2°F).
Average pressure in December
Glastonbury, CT
- Average pressure in December: 30.05"Hg
The month with the highest atmospheric pressure is November (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in December
Glastonbury, CT
- Average wind speed in December: 7.8mph
The windiest months (with the highest average wind speed) are January and March (8.1mph).
The calmest months (with the lowest average wind speed) are July and August (5.3mph).
Average humidity in December
Glastonbury, CT
- Average humidity in December: 77%
The month with the highest relative humidity is February (79%).
The month with the lowest relative humidity is April (70%).
Average rainfall in December
Glastonbury, CT
- Average rainfall in December: 3.19"
The wettest month (with the highest rainfall) is December (3.19").
The driest month (with the least rainfall) is September (1.93").
Average rainfall days in December
Glastonbury, CT
- Average rainfall days in December: 11.3 days
The month with the highest number of rainy days is July (17.6 days).
The month with the least rainy days is January (9.2 days).
Average snowfall in December
Glastonbury, CT
- Average snowfall in December: 2.83"
The month with the highest snowfall is February (4.45").
The months with the least snowfall are June, July, August, September and October (0").
Average snowfall days in December
Glastonbury, CT
- Average snowfall days in December: 5.3 days
The month with the highest number of snowfall days is February (8.1 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Glastonbury, CT
- 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 months with the most sunshine are July and August (Average sunshine: 10h and 24min).
The month with the least sunshine is February (Average sunshine: 4h and 36min).
Average sunshine days in December
Glastonbury, CT
- Average sunshine days in December: 15.5 days
The month with the most sunshine days is January (17.6 days).
The month with the least sunshine days is June (10.7 days).
Average UV index in December
Glastonbury, CT
- Average UV index in December: 1
The months with the highest UV index are June and July (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in December
Glastonbury, CT
- Average cloud cover in December: 48
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
Glastonbury, CT
- Average visibility in December: 6mi
The months with the highest visibility are January, March, April, June, July, August, October, November and December (6mi).
The months with the lowest visibility are February, May and September (5mi).
Glastonbury, Connecticut, USA
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