December weather forecast
Vilas, SD

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Weather in December

The first month of the winter, December, is still a freezing cold month in Vilas, South Dakota, with an average temperature fluctuating between 14.2°F (-9.9°C) and 25.7°F (-3.5°C).

Temperature

A notable decrease in the average high-temperature is observed during December, falling from a wintry 41.9°F (5.5°C) in November to a freezing cold 25.7°F (-3.5°C). An average low-temperature of 14.2°F (-9.9°C) is recorded during the nights in December.

Humidity

In Vilas, the average relative humidity in December is 86%.

Rainfall

In Vilas, during December, the rain falls for 3.3 days and regularly aggregates up to 1.02" (26mm) of precipitation. Throughout the year, there are 111.2 rainfall days, and 21.14" (537mm) of precipitation is accumulated.

Snowfall

Months with snowfall are January through May, October through December. In Vilas, in December, during 10.3 snowfall days, 4.21" (107mm) of snow is typically accumulated. In Vilas, South Dakota, during the entire year, snow falls for 49.4 days and aggregates up to 20.04" (509mm) of snow.

Daylight

With an average of 9h and 0min of daylight, December has the shortest days of the year.
On the first day of the month, sunrise is at 7:45 am and sunset at 4:53 pm. On the last day of December, sunrise is at 8:05 am and sunset at 5:02 pm CST.

Sunshine

In Vilas, the average sunshine in December is 4.1h.

UV index

The months with the lowest UV index in Vilas, South Dakota, are January and December, with an average maximum UV index of 1. A UV Index of 2, and less, symbolizes a minimal health vulnerability from unprotected exposure to Sun's UV rays for the ordinary person.
Note: During December, 1 as the daily maximum UV index converts into the following advice:
Children necessitate constant protection from sunlight, unlike the majority, who can remain under the sun for about an hour without burning. The Sun's radiation is especially intense around midday; try to stay in shade during this period. To cut down UV radiation exposure by about half, sport a wide-brim hat. Guard yourself! Snow reflection can almost double the UV radiation from the Sun.
Updated: Jun 29, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

How cold is it in December?

An average high-temperature, in December, in Vilas, is 25.7°F (-3.5°C) and the average low-temperature is 14.2°F (-9.9°C). In August, the average heat index (a.k.a. 'real feel', 'felt air temperature'), which factors the actual air temperature with the relative humidity, is evaluated at 84.2°F (29°C).

What is the average humidity in December in Vilas?

In December, the average relative humidity is 86%.

How many days does it rain in December?

In Vilas, during December, the rain falls for 3.3 days and regularly aggregates up to 1.02" (26mm) of precipitation.

How many days does it snow in December?

In December, it is snowing for 10.3 days. Throughout December, 4.21" (107mm) of snow is accumulated.

What is the month with the shortest days?

December has the shortest days of the year, with an average of 9h and 0min of daylight.

What is the average length of the day in December?

The average day length in December is 8h and 58min.

When is the sunrise / sunset in December?

In December, on the first day of the month, sunrise is at 7:45 am and sunset at 4:53 pm. On the last day of the month, sunrise is at 8:05 am and sunset at 5:02 pm CST.

How long on average sun shines in December?

In Vilas, the average sunshine duration in December is 4.1h.

What are the months with the lowest UV index in Vilas?

January and December, with an average maximum UV index of 1, are months with the lowest UV index.

How high is the UV index in December?

The average daily maximum UV index in December is 1. A UV Index reading of 2, and below, represents a minimal hazard to health from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in December
Vilas, SD

Average temperature in December - Vilas, SD
  • Average high temperature in December: 25.7°F

The warmest month (with the highest average high temperature) is July (82.2°F).
The month with the lowest average high temperature is January (22.3°F).

  • Average low temperature in December: 14.2°F

The month with the highest average low temperature is July (62.4°F).
The coldest month (with the lowest average low temperature) is January (8.1°F).

Average pressure in December
Vilas, SD

Average pressure in December - Vilas, SD
  • Average pressure in December: 30.13"Hg

The months with the highest atmospheric pressure are January and February (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.85"Hg).

Average wind speed in December
Vilas, SD

Average wind speed in December - Vilas, SD
  • Average wind speed in December: 10.6mph

The windiest month (with the highest average wind speed) is April (11.6mph).
The calmest months (with the lowest average wind speed) are July and August (8.6mph).

Average humidity in December
Vilas, SD

Average humidity in December - Vilas, SD
  • Average humidity in December: 86%

The month with the highest relative humidity is January (90%).
The month with the lowest relative humidity is October (67%).

Average rainfall in December
Vilas, SD

Average rainfall in December - Vilas, SD
  • Average rainfall in December: 1.02"

The wettest month (with the highest rainfall) is June (3.23").
The driest month (with the least rainfall) is November (0.59").

Average rainfall days in December
Vilas, SD

Average rainfall days in December - Vilas, SD
  • Average rainfall days in December: 3.3 days

The month with the highest number of rainy days is June (18.7 days).
The month with the least rainy days is January (1.6 days).

Average snowfall in December
Vilas, SD

Average snowfall in December - Vilas, SD
  • Average snowfall in December: 4.21"

The month with the highest snowfall is February (4.76").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in December
Vilas, SD

Average snowfall days in December - Vilas, SD
  • Average snowfall days in December: 10.3 days

The month with the highest number of snowfall days is January (11.3 days).
The months with the least snowfall days are June, July, August and September (0 days).

Average daylight in December /
Average sunshine in December
Vilas, SD

Average daylight in December / Average sunshine in December - Vilas, SD
  • Average daylight in December: 9h and 0min

The month with the longest days is June (Average daylight: 15h and 24min).
The month with the shortest days is December (Average daylight: 9h and 0min).

  • Average sunshine in December: 4h and 1min

The month with the most sunshine is July (Average sunshine: 10h and 36min).
The month with the least sunshine is January (Average sunshine: 3h and 48min).

Average sunshine days in December
Vilas, SD

Average sunshine days in December - Vilas, SD
  • Average sunshine days in December: 19.7 days

The month with the most sunshine days is November (22.4 days).
The month with the least sunshine days is June (9.5 days).

Average UV index in December
Vilas, SD

Average UV index in December - Vilas, SD
  • Average UV index in December: 1

The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January and December (UV index 1).

Average cloud cover in December
Vilas, SD

Average cloud cover in December - Vilas, SD
  • Average cloud cover in December: 56

The month with the most cloud cover is January (Cloud cover 60).
The month with the least cloud cover is July (Cloud cover 28).

Average visibility in December
Vilas, SD

Average visibility in December - Vilas, SD
  • Average visibility in December: 6mi

The months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is January (5mi).

Vilas, South Dakota, USA

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