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
A decrease in the average high-temperature is observed during December, shifting from a fresh 50.9°F (10.5°C) in November to a cold 41.9°F (5.5°C). Darien, during the December nights, maintains an average temperature of 33.3°F (0.7°C), closely aligned with its daytime readings.Humidity
In Darien, the average relative humidity in December is 75%.Rainfall
The wettest months in Darien, Connecticut, are July and December, with an average 4.17" (106mm) of rainfall.Snowfall
Months with snowfall are January through April, November and December. In Darien, during December, snow falls for 4.2 days and regularly aggregates up to 1.69" (43mm) of snow. Throughout the year, in Darien, there are 25.7 snowfall days, and 9.09" (231mm) of snow is accumulated.Daylight
December has the shortest days of the year in Darien, with an average of 9h and 18min of daylight.On the first day of the month, sunrise is at 7:00 am and sunset at 4:26 pm. On the last day of December, sunrise is at 7:18 am and sunset at 4:35 pm EST.
Sunshine
The average sunshine in December in Darien is 4.8h.UV index
The months with the lowest UV index in Darien are January through March, November and December, with an average maximum UV index of 2. A UV Index value of 2, and less, symbolizes a minimal health hazard from unsafe exposure to UV radiation for ordinary individuals.Note: A daily maximum UV index of 2 in December translates into the following instructions:
Many can withstand an hour in the sun without burning, yet children must always have protection against sunlight. Considering the harmful UV rays from the Sun during midday, it's essential to reduce exposure. Your best bet for sun defense on the face, eyes, and neck is a hat with a wide brim. Notice! The UV radiation of the Sun can be intensified nearly twofold due to the reflective quality of snow.
Frequently asked questions
How cold is December in Darien?
What is the average humidity in December in Darien?
What is the rainiest month in Darien?
How much does it rain in Darien in December?
How many days does it snow in December in Darien?
What is the month with the shortest days in Darien?
How many hours of daylight does Darien have in December?
When is the sunrise / sunset in December in Darien?
How long on average sun shines in December in Darien?
When is the lowest UV index in Darien?
How high is the UV index in December in Darien?
Average temperature in December
Darien, CT
- Average high temperature in December: 41.9°F
The warmest month (with the highest average high temperature) is July (81.3°F).
The month with the lowest average high temperature is January (36.1°F).
- Average low temperature in December: 33.3°F
The month with the highest average low temperature is July (68.9°F).
The coldest month (with the lowest average low temperature) is January (26.4°F).
Average pressure in December
Darien, CT
- Average pressure in December: 30.06"Hg
The month with the highest atmospheric pressure is November (30.1"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in December
Darien, CT
- Average wind speed in December: 9.9mph
The windiest month (with the highest average wind speed) is January (10.3mph).
The calmest month (with the lowest average wind speed) is July (6.6mph).
Average humidity in December
Darien, CT
- Average humidity in December: 75%
The month with the highest relative humidity is May (76%).
The months with the lowest relative humidity are April, August and November (72%).
Average rainfall in December
Darien, CT
- Average rainfall in December: 4.17"
The wettest months (with the highest rainfall) are July and December (4.17").
The driest month (with the least rainfall) is January (2.48").
Average rainfall days in December
Darien, CT
- Average rainfall days in December: 12.4 days
The month with the highest number of rainy days is May (17.3 days).
The month with the least rainy days is January (8.8 days).
Average snowfall in December
Darien, CT
- Average snowfall in December: 1.69"
The month with the highest snowfall is February (2.64").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in December
Darien, CT
- Average snowfall days in December: 4.2 days
The month with the highest number of snowfall days is February (7.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Darien, CT
- Average daylight in December: 9h and 2min
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 5min
The month with the most sunshine is July (Average sunshine: 10h and 24min).
The month with the least sunshine is February (Average sunshine: 4h and 36min).
Average sunshine days in December
Darien, CT
- Average sunshine days in December: 14.3 days
The month with the most sunshine days is November (17.3 days).
The month with the least sunshine days is June (10.8 days).
Average UV index in December
Darien, 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
Darien, CT
- Average cloud cover in December: 49
The month with the most cloud cover is December (Cloud cover 49).
The month with the least cloud cover is August (Cloud cover 31).
Average visibility in December
Darien, 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).
Darien, Connecticut, USA
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