December weather forecast and climate
Westport, CT

The colorful houses on the shores of Westport, Connecticut
The colorful houses on the shores of Westport, Connecticut

Weather in December

December, the first month of the winter, in Westport, is still a cold month, with average temperature fluctuating between 32.9°F (0.5°C) and 41.9°F (5.5°C).

Temperature

In Westport, the average high-temperature drops, from a fresh 50.9°F (10.5°C) in November, to a wintry 41.9°F (5.5°C). The average low-temperature, in Westport, is 32.9°F (0.5°C).

Humidity

In December, the average relative humidity in Westport is 75%.

Rainfall

In Westport, during December, the rain falls for 12.2 days and regularly aggregates up to 3.98" (101mm) of precipitation. Throughout the year, there are 166.3 rainfall days, and 37.87" (962mm) of precipitation is accumulated.

Snowfall

January through April, November and December are months with snowfall in Westport. In Westport, during 3.6 snowfall days, 1.77" (45mm) of snow is typically accumulated. In Westport, during the entire year, snow falls for 24.6 days, and aggregates up to 9.61" (244mm) of snow.

Daylight

December has the shortest days of the year in Westport, with an average of 9.3h of daylight.

Sunshine

The average sunshine in Westport is 4.8h.

UV index

January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Westport, Connecticut. A UV Index reading of 2, and below, represents a low threat to health from unsafe exposure to the UV radiation for ordinary individuals.
Note: The daily maximum UV index of 2 interpret into the following advice:
People with sensitive skin, children, and babies should always be protected from prolonged sun exposure. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
[Resources]

FAQ

What is the average humidity in December in Westport?

The average relative humidity in December is 75%.

How many days does it rain in December in Westport?

In Westport, during December, the rain falls for 12.2 days and regularly aggregates up to 3.98" (101mm) of precipitation.

How many days does it snow in December in Westport?

In Westport, during December, snow falls for 3.6 days and regularly aggregates up to 1.77" (45mm) of snow.

What is the month with the shortest days in Westport?

With an average of 9.3h of daylight, December has the shortest days of the year in Westport, Connecticut.

How many hours of daylight does Westport have in December?

The average length of the day in December in Westport is 9.3h.

How long on average sun shines in December in Westport?

The average sunshine in December in Westport is 4.8h.

What is the month with the lowest UV index in Westport?

Months with the lowest UV index in Westport are January through March, November and December, with an average maximum UV index of 2.

How high is the UV index in December in Westport?

In Westport, the average daily maximum UV index in December is 2. A UV Index value of 2, and less, symbolizes a minimal hazard to health from unprotected exposure to the UV radiation.

Average temperature in December
Westport, CT

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).

[Resources]

Average pressure in December
Westport, CT

Average pressure in December - Westport, CT
  • Average pressure in December: 30.06"

The month with the highest atmospheric pressure is November (30.09").
The month with the lowest atmospheric pressure is June (29.93").

[Resources]

Average wind speed in December
Westport, CT

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).

[Resources]

Average humidity in December
Westport, CT

Average humidity in December - Westport, CT
  • Average humidity in December: 75%

Months with the highest relative humidity are February, May and June (76%).
Months with the lowest relative humidity are April and November (72%).

[Resources]

Average rainfall in December
Westport, CT

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").

[Resources]

Average rainfall days in December
Westport, CT

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).

[Resources]

Average snowfall in December
Westport, CT

Average snowfall in December - Westport, CT
  • Average snowfall in December: 1.77"

The month with the highest snowfall is February (2.83").
Months with the least snowfall are May, June, July, August, September and October (0").

[Resources]

Average snowfall days in December
Westport, CT

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).
Months with the least snowfall days are June, July, August and September (0 days).

[Resources]

Average daylight in December /
Average sunshine in December
Westport, CT

Average daylight in December / Average sunshine in December - Westport, CT
  • Average daylight in December: 9.3h

The month with the longest days is June (Average daylight: 15.1h).
The month with the shortest days is December (Average daylight: 9.3h).

  • Average sunshine in December: 4.8h

The month with the most sunshine is July (Average sunshine: 10.5h).
The month with the least sunshine is February (Average sunshine: 4.7h).

[Resources]

Average sunshine days in December
Westport, CT

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).

[Resources]

Average UV index in December
Westport, CT

Average UV index in December - Westport, CT
  • Average UV index in December: 2

Months with the highest UV index are June, July and August (UV index 6).
Months with the lowest UV index are January, February, March, November and December (UV index 2).

[Resources]

Average cloud cover in December
Westport, CT

Average cloud cover in December - Westport, CT
  • Average cloud cover in December: 48

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).

[Resources]

Average visibility in December
Westport, CT

Average visibility in December - Westport, CT
  • Average visibility in December: 6mi

Months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

[Resources]

Weather forecast for your location

1. Click Locate me button
2. Allow the app to use your location
* you will be automatically redirected to the weather forecast for your location