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
Westport's December weather features a mild decline in high-temperatures, reducing from a cool 50.9°F (10.5°C) in November to a cold 41.9°F (5.5°C). Nighttime, during December, brings an average low of 32.9°F (0.5°C), a modest reduction from the day's peak.Humidity
In December, the average relative humidity is 75%.Rainfall
In Westport, Connecticut, in December, it is raining for 12.2 days, with typically 3.98" (101mm) of accumulated precipitation. Throughout the year, in Westport, there are 166.3 rainfall days, and 37.87" (962mm) of precipitation is accumulated.Snowfall
Months with snowfall in Westport are January through April, November and December. In Westport, in December, during 3.6 snowfall days, 1.77" (45mm) of snow is typically accumulated. Throughout the year, in Westport, there are 24.6 snowfall days, and 9.61" (244mm) of snow is accumulated.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 6:59 am and sunset at 4:25 pm. On the last day of the month, sunrise is at 7:18 am and sunset at 4:34 pm EST.
Sunshine
The average sunshine in December is 4.8h.UV index
The months with the lowest UV index in Westport are January through March, November and December, with an average maximum UV index of 2. A UV Index of 2, and less, symbolizes a low threat to health from exposure to the Sun's UV radiation for ordinary individuals.Note: In December, an average UV index of 2 transforms into the following instructions:
While most people are not greatly affected by extended sun exposure, those with fair skin, babies, and children must always have protection. The Sun's most harmful UV rays are emitted around midday; avoid staying outdoors for long during this time. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days. Be aware! The reflective nature of snow can magnify the Sun's UV radiation almost twofold.
Frequently asked questions
How cold does it get in Westport in December?
What is the average humidity in December in Westport?
How many days does it rain in December in Westport?
How much does it snow in Westport in December?
What is the month with the shortest days in Westport?
How many hours of daylight does Westport have in December?
When is the sunrise / sunset in December in Westport?
How many hours of sunshine does Westport have in December?
What are the months with the lowest UV index in Westport?
What is the UV index reading in December in Westport?
Average temperature in December
Westport, CT
- Average high temperature in December: 41.9°F
The warmest month (with the highest average high temperature) is July (81.1°F).
The month with the lowest average high temperature is January (35.8°F).
- Average low temperature in December: 32.9°F
The month with the highest average low temperature is July (68.2°F).
The coldest month (with the lowest average low temperature) is January (26.4°F).
Average pressure in December
Westport, 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
Westport, CT
- Average wind speed in December: 9.8mph
The windiest month (with the highest average wind speed) is January (10.1mph).
The calmest month (with the lowest average wind speed) is July (6.5mph).
Average humidity in December
Westport, CT
- Average humidity in December: 75%
The months with the highest relative humidity are February, May and June (76%).
The months with the lowest relative humidity are April and November (72%).
Average rainfall in December
Westport, CT
- Average rainfall in December: 3.98"
The wettest month (with the highest rainfall) is July (4.13").
The driest months (with the least rainfall) are January and February (2.36").
Average rainfall days in December
Westport, CT
- Average rainfall days in December: 12.2 days
The month with the highest number of rainy days is July (18.1 days).
The month with the least rainy days is January (8.3 days).
Average snowfall in December
Westport, CT
- Average snowfall in December: 1.77"
The month with the highest snowfall is February (2.83").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in December
Westport, CT
- Average snowfall days in December: 3.6 days
The month with the highest number of snowfall days is February (7.4 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Westport, 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 30min).
The month with the least sunshine is February (Average sunshine: 4h and 42min).
Average sunshine days in December
Westport, CT
- Average sunshine days in December: 15.4 days
The month with the most sunshine days is January (17.8 days).
The month with the least sunshine days is June (10 days).
Average UV index in December
Westport, 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
Westport, CT
- Average cloud cover in December: 48
The months with the most cloud cover are February, March and December (Cloud cover 48).
The month with the least cloud cover is August (Cloud cover 30).
Average visibility in December
Westport, 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).
Westport, Connecticut, USA
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