December weather forecast
Deadwood, SD

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The warm setting sun has its rays spread over the scenic landscape in the colorful town of Deadwood, South Dakota
The warm setting sun has its rays spread over the scenic landscape in the colorful town of Deadwood, South Dakota

Weather in December

December is the arrival of full-fledged winter in Deadwood, with the coldest average high temperature of 29.7°F (-1.3°C) for the year. It is a good time to enjoy winter activities, especially if one is an enthusiast of winter sports. There is a noticeable drop in the sunshine hours, the days are short, and frequent snowfall adds to the season's festivity. Despite the cold, the city exudes a unique charm during this time due to the holiday season.

Temperature

December is the coldest month of the year in Deadwood, South Dakota, registering average temperatures as high as 29.7°F (-1.3°C) and as low as 16.7°F (-8.5°C).

Humidity

In December, the average relative humidity is 77%.

Rainfall

In December, in Deadwood, the rain falls for 4.2 days. Throughout December, 0.67" (17mm) of precipitation is accumulated. Throughout the year, there are 96.1 rainfall days, and 14.02" (356mm) of precipitation is accumulated.

Snowfall

Months with snowfall in Deadwood are January through June, September through December. In Deadwood, South Dakota, in December, during 10.1 snowfall days, 3.78" (96mm) of snow is typically accumulated. In Deadwood, South Dakota, during the entire year, snow falls for 66.6 days and aggregates up to 34.53" (877mm) of snow.

Daylight

December has the shortest days of the year, with an average of 8h and 54min of daylight.
On the first day of December in Deadwood, 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.

Sunshine

In December, the average sunshine is 6h.

UV index

January through March, October through December, with an average maximum UV index of 2, are months with the lowest UV index in Deadwood. A UV Index of 2, and less, symbolizes a low health risk from exposure to the Sun's UV radiation for the ordinary person.
Note: A maximum high UV index of 2 in December translates into the following recommendations:
Children must always have sun protection, unlike most people, who can tolerate up to an hour in the sun without any burns. To avoid the Sun's strongest rays, limit exposure around the mid-day period. Clothes that are both tight-knit and comfortably loose are prime choices for sun protection. Observe! Snow reflection can nearly intensify the Sun's UV radiation twofold.
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Frequently asked questions

What part of the year is the coldest in Deadwood?

December is the coldest month, with the temperature often reaching an average high of 29.7°F (-1.3°C) and an average low of 16.7°F (-8.5°C).

How cold is it in Deadwood in December?

The high-temperature, in December, in Deadwood, records 29.7°F (-1.3°C), while the low-temperature is 16.7°F (-8.5°C). In July, the average heat index (a.k.a. 'felt air temperature', 'apparent temperature'), which calculates the temperature value influenced by the moisture in the air, is appraised at 82.4°F (28°C).

What is the average humidity in December in Deadwood?

In December, the average relative humidity is 77%.

How many days does it rain in December in Deadwood?

In Deadwood, in December, during 4.2 rainfall days, 0.67" (17mm) of precipitation is typically accumulated.

How many days does it snow in December in Deadwood?

In Deadwood, in December, snow falls for 10.1 days, with typically accumulated 3.78" (96mm) of snow.

What is the month with the shortest days in Deadwood?

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

How many hours of daylight does Deadwood have in December?

In Deadwood, South Dakota, the average day length in December is 8h and 55min.

What time are sunrise and sunset in December in Deadwood?

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

How long on average sun shines in December in Deadwood?

The average sunshine duration in December is 6h.

When is the lowest UV index in Deadwood?

January through March, October through December, with an average maximum UV index of 2, are months with the lowest UV index in Deadwood.

What is the UV index reading in December in Deadwood?

The average daily maximum UV index in December in Deadwood, South Dakota, is 2. A UV Index of 2, and less, symbolizes 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
Deadwood, SD

Average temperature in December - Deadwood, SD
  • Average high temperature in December: 29.7°F

The warmest month (with the highest average high temperature) is July (81.9°F).
The month with the lowest average high temperature is December (29.7°F).

  • Average low temperature in December: 16.7°F

The month with the highest average low temperature is July (60.4°F).
The coldest month (with the lowest average low temperature) is February (15.4°F).

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Average pressure in December
Deadwood, SD

Average pressure in December - Deadwood, 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).

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Average wind speed in December
Deadwood, SD

Average wind speed in December - Deadwood, SD
  • Average wind speed in December: 9.5mph

The windiest month (with the highest average wind speed) is October (9.9mph).
The calmest month (with the lowest average wind speed) is August (7.6mph).

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Average humidity in December
Deadwood, SD

Average humidity in December - Deadwood, SD
  • Average humidity in December: 77%

The months with the highest relative humidity are January and February (79%).
The months with the lowest relative humidity are August and September (51%).

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Average rainfall in December
Deadwood, SD

Average rainfall in December - Deadwood, SD
  • Average rainfall in December: 0.67"

The wettest month (with the highest rainfall) is May (1.93").
The driest month (with the least rainfall) is January (0.55").

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Average rainfall days in December
Deadwood, SD

Average rainfall days in December - Deadwood, SD
  • Average rainfall days in December: 4.2 days

The month with the highest number of rainy days is June (14.2 days).
The month with the least rainy days is November (2.7 days).

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Average snowfall in December
Deadwood, SD

Average snowfall in December - Deadwood, SD
  • Average snowfall in December: 3.78"

The month with the highest snowfall is April (6.54").
The months with the least snowfall are July and August (0").

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Average snowfall days in December
Deadwood, SD

Average snowfall days in December - Deadwood, SD
  • Average snowfall days in December: 10.1 days

The month with the highest number of snowfall days is January (11.7 days).
The months with the least snowfall days are July and August (0 days).

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

Average daylight in December / Average sunshine in December - Deadwood, 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).

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Average sunshine days in December
Deadwood, SD

Average sunshine days in December - Deadwood, SD
  • Average sunshine days in December: 19.5 days

The month with the most sunshine days is November (20.5 days).
The month with the least sunshine days is June (12.3 days).

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Average UV index in December
Deadwood, SD

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

The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February, March, October, November and December (UV index 2).

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Average cloud cover in December
Deadwood, SD

Average cloud cover in December - Deadwood, SD
  • Average cloud cover in December: 37

The months with the most cloud cover are February and April (Cloud cover 40).
The month with the least cloud cover is August (Cloud cover 16).

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Average visibility in December
Deadwood, SD

Average visibility in December - Deadwood, 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).

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Deadwood, South Dakota, USA

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