December weather forecastGuilford, CT
December
Weather in December
The first month of the winter, December, is also a wintry month in Guilford, Connecticut, with an average temperature ranging between max 41.4°F (5.2°C) and min 32.2°F (0.1°C).Temperature
During Guilford's transition into December, the average high-temperature lessens, moving from a cool 50.5°F (10.3°C) in November to an icy 41.4°F (5.2°C). Guilford's nights in December experience an average temperature drop to 32.2°F (0.1°C).Humidity
In December, the average relative humidity is 75%.Rainfall
December is the month with the most rainfall. Rain falls for 13 days and accumulates 3.94" (100mm) of precipitation.Snowfall
January through May, November and December are months with snowfall. In December, it is snowing for 4.3 days. Throughout December, 1.42" (36mm) of snow is accumulated. In Guilford, Connecticut, during the entire year, snow falls for 26.4 days and aggregates up to 10.12" (257mm) of snow.Daylight
The month with the shortest days is December, with an average of 9h and 18min of daylight.On the first day of December, sunrise is at 6:57 am and sunset at 4:22 pm. On the last day of the month, sunrise is at 7:16 am and sunset at 4:31 pm EST.
Sunshine
In December, the average sunshine is 4.9h.UV index
January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index reading of 2, and below, represents a minimal health vulnerability from exposure to the Sun's UV radiation for the average person.Note: In December, the maximum UV index of 2 suggests this advice:
Prolonged sun exposure generally does not trouble most people. However, it is vital to ensure protection for babies, children, and individuals with sensitive skin. When the Sun is at its strongest around midday, find shade and limit exposure. Shield yourself from the harmful effects of UV radiation with sun-protective attire, a hat, and quality sunglasses. Heed this! Snow reflection can almost augment the UV radiation of the sun by double.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Guilford, CT
- Average high temperature in December: 41.4°F
The warmest month (with the highest average high temperature) is July (80.4°F).
The month with the lowest average high temperature is January (35.2°F).
- Average low temperature in December: 32.2°F
The month with the highest average low temperature is July (67.5°F).
The coldest month (with the lowest average low temperature) is January (25.5°F).
Average pressure in December
Guilford, CT
- Average pressure in December: 30.06"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
Guilford, CT
- Average wind speed in December: 10mph
The windiest month (with the highest average wind speed) is January (10.3mph).
The calmest months (with the lowest average wind speed) are July and August (6.7mph).
Average humidity in December
Guilford, CT
- Average humidity in December: 75%
The month with the highest relative humidity is June (77%).
The month with the lowest relative humidity is April (72%).
Average rainfall in December
Guilford, CT
- Average rainfall in December: 3.94"
The wettest month (with the highest rainfall) is December (3.94").
The driest month (with the least rainfall) is September (2.09").
Average rainfall days in December
Guilford, CT
- Average rainfall days in December: 13 days
The month with the highest number of rainy days is July (17.6 days).
The month with the least rainy days is January (9.6 days).
Average snowfall in December
Guilford, CT
- Average snowfall in December: 1.42"
The month with the highest snowfall is March (3.11").
The months with the least snowfall are June, July, August, September and October (0").
Average snowfall days in December
Guilford, CT
- Average snowfall days in December: 4.3 days
The month with the highest number of snowfall days is February (7.7 days).
The months with the least snowfall days are June, July, August, September and October (0 days).
Average daylight in December /
Average sunshine in December
Guilford, CT
- Average daylight in December: 9h and 18min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in December: 4h and 54min
The months with the most sunshine are July and August (Average sunshine: 10h and 36min).
The month with the least sunshine is February (Average sunshine: 4h and 48min).
Average sunshine days in December
Guilford, CT
- Average sunshine days in December: 14.8 days
The month with the most sunshine days is November (17.5 days).
The month with the least sunshine days is June (11.3 days).
Average UV index in December
Guilford, CT
- 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
Guilford, CT
- Average cloud cover in December: 48
The months with the most cloud cover are February and December (Cloud cover 48).
The month with the least cloud cover is August (Cloud cover 29).
Average visibility in December
Guilford, CT
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
