December weather forecast
Whitewood, SD

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Weather in December

The first month of the winter, December, is also an icy month in Whitewood, South Dakota, with an average temperature varying between 18.9°F (-7.3°C) and 32.2°F (0.1°C).

Temperature

Whitewood experiences its lowest average temperatures in December, reaching a peak of 32.2°F (0.1°C) and a minimum of 18.9°F (-7.3°C).

Humidity

The average relative humidity in December is 75%.

Rainfall

In December, the rain falls for 5.8 days. Throughout December, 0.75" (19mm) of precipitation is accumulated. Throughout the year, there are 126.3 rainfall days, and 16.77" (426mm) of precipitation is accumulated.

Snowfall

Months with snowfall are January through May, September through December. In December, it is snowing for 9.9 days. Throughout December, 4.06" (103mm) of snow is accumulated. In Whitewood, during the entire year, snow falls for 62.1 days and aggregates up to 36.26" (921mm) of snow.

Daylight

The month with the shortest days is December, with an average of 8h and 54min of daylight.
On the first day of the month, sunrise is at 7:11 am and sunset at 4:16 pm. On the last day of December, sunrise is at 7:30 am and sunset at 4:25 pm MST.

Sunshine

In Whitewood, the average sunshine in December is 6h.

UV index

January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Whitewood, South Dakota. A UV Index of 2, and less, symbolizes a minimal health vulnerability from unsafe exposure to UV radiation for the ordinary person.
Note: The maximum UV index of 2 during December leads to these instructions:
Children necessitate constant protection from sunlight, unlike the majority, who can remain under the sun for about an hour without burning. Protect yourself from the midday Sun's peak UV radiation by minimizing exposure. Boost your sun resistance with garments that are densely woven yet spacious. Mark this! Snow reflection can nearly double the UV radiation intensity from the Sun.
Updated: Aug 12, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What part of the year is the coldest?

Whitewood's December weather, with an average high temperature of 32.2°F (0.1°C) and an average low temperature of 18.9°F (-7.3°C), tends to be the coldest of the year.

How cold is December?

The high-temperature during December is 32.2°F (0.1°C) and the low-temperature is 18.9°F (-7.3°C). In August, the average heat index (a.k.a. 'real feel', 'apparent temperature'), which combines relative humidity and air temperature, is evaluated at 82.4°F (28°C).

What is the average humidity in December?

In December, the average relative humidity is 75%.

How many days does it rain in December?

In Whitewood, in December, it is raining for 5.8 days, with typically 0.75" (19mm) of accumulated precipitation.

How much does it snow in December?

In Whitewood, during December, snow falls for 9.9 days and regularly aggregates up to 4.06" (103mm) of snow.

What is the month with the shortest days?

December has the shortest days of the year, with an average of 8h and 54min of daylight.

How many hours of daylight does Whitewood have in December?

The average day length in December is 8h and 54min.

When is the sunrise / sunset in December in Whitewood?

On the first day of December, sunrise is at 7:11 am and sunset at 4:16 pm. On the last day of the month, sunrise is at 7:30 am and sunset at 4:25 pm MST.

How long on average sun shines in December in Whitewood?

In December, the average sunshine duration is 6h.

When is the lowest UV index?

The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 2.

What is the UV index intensity in December?

In Whitewood, the average daily maximum UV index in December is 2. A UV Index reading of 2, and below, represents a low health threat 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
Whitewood, SD

Average temperature in December - Whitewood, SD
  • Average high temperature in December: 32.2°F

The warmest month (with the highest average high temperature) is July (84.7°F).
The month with the lowest average high temperature is December (32.2°F).

  • Average low temperature in December: 18.9°F

The month with the highest average low temperature is July (62.4°F).
The coldest month (with the lowest average low temperature) is February (18°F).

Average pressure in December
Whitewood, SD

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

The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.84"Hg).

Average wind speed in December
Whitewood, SD

Average wind speed in December - Whitewood, SD
  • Average wind speed in December: 9.8mph

The windiest month (with the highest average wind speed) is October (10.4mph).
The calmest months (with the lowest average wind speed) are July and August (8.3mph).

Average humidity in December
Whitewood, SD

Average humidity in December - Whitewood, SD
  • Average humidity in December: 75%

The month with the highest relative humidity is January (77%).
The months with the lowest relative humidity are August and September (49%).

Average rainfall in December
Whitewood, SD

Average rainfall in December - Whitewood, SD
  • Average rainfall in December: 0.75"

The wettest month (with the highest rainfall) is May (2.52").
The driest month (with the least rainfall) is January (0.59").

Average rainfall days in December
Whitewood, SD

Average rainfall days in December - Whitewood, SD
  • Average rainfall days in December: 5.8 days

The month with the highest number of rainy days is May (17.3 days).
The month with the least rainy days is December (5.8 days).

Average snowfall in December
Whitewood, SD

Average snowfall in December - Whitewood, SD
  • Average snowfall in December: 4.06"

The month with the highest snowfall is April (8.23").
The months with the least snowfall are June, July and August (0").

Average snowfall days in December
Whitewood, SD

Average snowfall days in December - Whitewood, SD
  • Average snowfall days in December: 9.9 days

The month with the highest number of snowfall days is February (12.8 days).
The months with the least snowfall days are June, July and August (0 days).

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

Average daylight in December / Average sunshine in December - Whitewood, SD
  • Average daylight in December: 8h and 5min

The month with the longest days is June (Average daylight: 15h and 30min).
The month with the shortest days is December (Average daylight: 8h and 54min).

  • Average sunshine in December: 6h and 0min

The month with the most sunshine is August (Average sunshine: 11h and 42min).
The month with the least sunshine is February (Average sunshine: 5h and 54min).

Average sunshine days in December
Whitewood, SD

Average sunshine days in December - Whitewood, SD
  • Average sunshine days in December: 17.8 days

The month with the most sunshine days is November (20 days).
The month with the least sunshine days is May (9.4 days).

Average UV index in December
Whitewood, SD

Average UV index in December - Whitewood, SD
  • 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, November and December (UV index 2).

Average cloud cover in December
Whitewood, SD

Average cloud cover in December - Whitewood, SD
  • Average cloud cover in December: 36

The months with the most cloud cover are February and April (Cloud cover 39).
The month with the least cloud cover is August (Cloud cover 16).

Average visibility in December
Whitewood, SD

Average visibility in December - Whitewood, 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).

Whitewood, South Dakota, USA

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