December weather forecast
Vermillion, SD

englishespañol中文
Share

Weather in December

December brings the return of winter to Vermillion, and with it, the return of colder temperatures and snow-laden sceneries. The winter solstice arrives mid-month, marking the shortest daylight hour of the year. The city becomes a canvas for new snowfalls, introducing a period of minimal rainfall and an increase in ice and frost. The wind also picks up, adding a bitter chill to the already cold environment. As Vermillion moves through December, preparations for enduring the brunt of winter become the primary agenda for residents.

Temperature

The arrival of December brings a significant change in Vermillion's weather, with average high-temperatures dropping from November's chilly 45.9°F (7.7°C) to a subzero cold 30°F (-1.1°C). Vermillion experiences an average temperature drop to 18°F (-7.8°C) during December nights.

Humidity

In December, the average relative humidity is 82%.

Rainfall

In Vermillion, South Dakota, in December, during 3.5 rainfall days, 1.22" (31mm) of precipitation is typically accumulated. In Vermillion, during the entire year, the rain falls for 116.6 days and collects up to 21.26" (540mm) of precipitation.

Snowfall

January through May, October through December are months with snowfall in Vermillion. In Vermillion, during December, snow falls for 6.6 days and regularly aggregates up to 2.64" (67mm) of snow. Throughout the year, in Vermillion, South Dakota, there are 30.7 snowfall days, and 13.9" (353mm) of snow is accumulated.

Daylight

December has the shortest days of the year in Vermillion, with an average of 9h and 6min of daylight.
On the first day of the month, sunrise is at 7:39 am and sunset at 4:54 pm. On the last day of December, in Vermillion, sunrise is at 7:58 am and sunset at 5:03 pm CST.

Sunshine

In December, the average sunshine in Vermillion is 4.7h.

UV index

The average daily maximum UV index in December in Vermillion is 2. A UV Index value of 2, and less, symbolizes a minimal health vulnerability from unsafe exposure to UV radiation for ordinary individuals.
Note: The maximum daily UV index of 2 in December converts into the following recommendations:
Most individuals face no significant issues with extended sun exposure, but it is always essential to protect children, babies, and those with sensitive skin. Stay safe from the Sun's strongest UV rays by limiting exposure during midday. For holistic sun protection encompassing the eyes, ears, face, and neck, a wide-brim hat is key. Be prepared! The intensity of the Sun's UV radiation can be amplified nearly double due to snow reflection.
[Resources]

Frequently asked questions

How cold is it in Vermillion in December?

During December, Vermillion experiences an average high-temperature of 30°F (-1.1°C) and a low-temperature of 18°F (-7.8°C). In August, the average heat index (a.k.a. 'apparent temperature', 'felt air temperature'), which combines relative humidity and air temperature, is appraised at 87.8°F (31°C).

What is the average humidity in December in Vermillion?

In December, the average relative humidity in Vermillion is 82%.

How much does it rain in Vermillion in December?

In December, in Vermillion, the rain falls for 3.5 days. Throughout December, 1.22" (31mm) of precipitation is accumulated.

How much does it snow in Vermillion in December?

In Vermillion, in December, snow falls for 6.6 days, with typically accumulated 2.64" (67mm) of snow.

What is the month with the shortest days in Vermillion?

With an average of 9h and 6min of daylight, December has the shortest days of the year in Vermillion.

What is the average length of the day in December in Vermillion?

In December, the average day length in Vermillion is 9h and 5min.

What time are sunrise and sunset in December in Vermillion?

On the first day of December, sunrise is at 7:39 am and sunset at 4:54 pm. On the last day of the month, sunrise is at 7:58 am and sunset at 5:03 pm CST.

How many hours of sunshine does Vermillion have in December?

In December, the average sunshine duration is 4.7h.

What is the UV index reading in December in Vermillion?

In Vermillion, South Dakota, the average daily maximum UV index in December is 2. A UV Index estimate of 2, and below, represents a minimal hazard to health from unsafe 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
Vermillion, SD

Average temperature in December - Vermillion, SD
  • Average high temperature in December: 30°F

The warmest month (with the highest average high temperature) is July (84.4°F).
The month with the lowest average high temperature is January (26.8°F).

  • Average low temperature in December: 18°F

The month with the highest average low temperature is July (64.9°F).
The coldest month (with the lowest average low temperature) is January (12.9°F).

[Resources]

Average pressure in December
Vermillion, SD

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

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

[Resources]

Average wind speed in December
Vermillion, SD

Average wind speed in December - Vermillion, SD
  • Average wind speed in December: 10.2mph

The windiest month (with the highest average wind speed) is April (11.1mph).
The calmest month (with the lowest average wind speed) is July (7.8mph).

[Resources]

Average humidity in December
Vermillion, SD

Average humidity in December - Vermillion, SD
  • Average humidity in December: 82%

The month with the highest relative humidity is January (84%).
The month with the lowest relative humidity is October (65%).

[Resources]

Average rainfall in December
Vermillion, SD

Average rainfall in December - Vermillion, SD
  • Average rainfall in December: 1.22"

The wettest month (with the highest rainfall) is June (3.35").
The driest months (with the least rainfall) are January and February (0.63").

[Resources]

Average rainfall days in December
Vermillion, SD

Average rainfall days in December - Vermillion, SD
  • Average rainfall days in December: 3.5 days

The month with the highest number of rainy days is June (17.3 days).
The months with the least rainy days are January and February (2.8 days).

[Resources]

Average snowfall in December
Vermillion, SD

Average snowfall in December - Vermillion, SD
  • Average snowfall in December: 2.64"

The months with the highest snowfall are January and February (2.83").
The months with the least snowfall are June, July, August and September (0").

[Resources]

Average snowfall days in December
Vermillion, SD

Average snowfall days in December - Vermillion, SD
  • Average snowfall days in December: 6.6 days

The month with the highest number of snowfall days is February (7.1 days).
The months with the least snowfall days are June, July, August and September (0 days).

[Resources]

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

Average daylight in December / Average sunshine in December - Vermillion, SD
  • Average daylight in December: 9h and 1min

The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 6min).

  • Average sunshine in December: 4h and 4min

The month with the most sunshine is July (Average sunshine: 10h and 54min).
The month with the least sunshine is January (Average sunshine: 4h and 30min).

[Resources]

Average sunshine days in December
Vermillion, SD

Average sunshine days in December - Vermillion, SD
  • Average sunshine days in December: 21.6 days

The month with the most sunshine days is January (22.2 days).
The month with the least sunshine days is June (10.3 days).

[Resources]

Average UV index in December
Vermillion, SD

Average UV index in December - Vermillion, SD
  • Average UV index in December: 2

The months with the highest UV index are June, July and August (UV index 6).
The month with the lowest UV index is January (UV index 1).

[Resources]

Average cloud cover in December
Vermillion, SD

Average cloud cover in December - Vermillion, SD
  • Average cloud cover in December: 48

The month with the most cloud cover is January (Cloud cover 51).
The month with the least cloud cover is July (Cloud cover 25).

[Resources]

Average visibility in December
Vermillion, SD

Average visibility in December - Vermillion, SD
  • 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).

[Resources]

Vermillion, South Dakota, USA

Weather forecast for your location

1. Click Locate me button
2. Allow the app to use your location