December weather forecast
Clark, SD

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Weather in December

The first month of the winter, December, is also a subzero cold month in Clark, South Dakota, with temperature in the range of an average low of 12.4°F (-10.9°C) and an average high of 23.7°F (-4.6°C).

Temperature

Clark's transition into December marks a considerable drop in the average high-temperature, moving down from a wintry 40.1°F (4.5°C) in November to a freezing cold 23.7°F (-4.6°C). In December, the average low-temperature is a frigid cold 12.4°F (-10.9°C).

Humidity

The average relative humidity in December in Clark is 87%.

Rainfall

In Clark, South Dakota, during December, the rain falls for 3.5 days and regularly aggregates up to 0.75" (19mm) of precipitation. Throughout the year, there are 112.3 rainfall days, and 18.78" (477mm) of precipitation is accumulated.

Snowfall

January through May, October through December are months with snowfall. The months with the most snowfall are January and December, with an average 3.74" (95mm) of accumulated snow.

Daylight

The month with the shortest days in Clark is December, with an average of 8h and 54min of daylight.
On the first day of the month, sunrise is at 7:49 am and sunset at 4:51 pm. On the last day of December, sunrise is at 8:08 am and sunset at 4:59 pm CST.

Sunshine

In Clark, the average sunshine in December is 4h.

UV index

January and December, with an average maximum UV index of 1, are months with the lowest UV index. A UV Index reading of 2, and below, represents a minimal health vulnerability from unsafe exposure to UV radiation for the average person.
Note: In December, a daily maximum UV index of 1 leads to the following instructions:
Children, babies, and those with sensitive skin should always be shielded from long periods of sun exposure. Midday is the peak time for the Sun's radiation; stay in the shade and protect yourself. Your best bet for sun defense on the face, eyes, and neck is a hat with a wide brim. Heed this! Snow reflection can almost augment the UV radiation of the sun by double.
Updated: Aug 26, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

How cold is December?

In Clark, 23.7°F (-4.6°C) is the average high-temperature and 12.4°F (-10.9°C) is the average low-temperature during December. The average heat index (a.k.a. 'feels like', 'real feel'), which represents the influence of relative humidity on air temperature, in July is evaluated at 84.2°F (29°C).

What is the average humidity in December?

In Clark, the average relative humidity in December is 87%.

How many days does it rain in December?

In Clark, in December, it is raining for 3.5 days, with typically 0.75" (19mm) of accumulated precipitation.

When does it snow the most?

The months with the most snowfall are January and December, with an average 3.74" (95mm) of accumulated snow.

How many days does it snow in December?

In Clark, in December, snow falls for 13 days, with typically accumulated 3.74" (95mm) of snow.

What is the month with the shortest days?

The month with the shortest days is December, with an average of 8h and 54min of daylight.

How many hours of daylight does Clark have in December?

The average day length in December is 8h and 51min.

When are sunrise and sunset in December?

In December, on the first day of the month, sunrise is at 7:49 am and sunset at 4:51 pm. On the last day of the month, sunrise is at 8:08 am and sunset at 4:59 pm CST.

How long on average sun shines in December?

In December, the average sunshine duration is 4h.

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

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

How high is the UV index in December?

In December, the average daily maximum UV index is 1. A UV Index of 2, and less, symbolizes a minimal hazard to health from unprotected exposure to UV radiation.
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
Clark, SD

Average temperature in December - Clark, SD
  • Average high temperature in December: 23.7°F

The warmest month (with the highest average high temperature) is July (80.8°F).
The month with the lowest average high temperature is January (19.4°F).

  • Average low temperature in December: 12.4°F

The month with the highest average low temperature is July (60.8°F).
The coldest month (with the lowest average low temperature) is January (5.5°F).

Average pressure in December
Clark, SD

Average pressure in December - Clark, 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
Clark, SD

Average wind speed in December - Clark, SD
  • Average wind speed in December: 11mph

The windiest month (with the highest average wind speed) is April (11.6mph).
The calmest month (with the lowest average wind speed) is July (8.5mph).

Average humidity in December
Clark, SD

Average humidity in December - Clark, SD
  • Average humidity in December: 87%

The month with the highest relative humidity is January (90%).
The months with the lowest relative humidity are September and October (68%).

Average rainfall in December
Clark, SD

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

The wettest month (with the highest rainfall) is June (3.19").
The driest months (with the least rainfall) are January and February (0.59").

Average rainfall days in December
Clark, SD

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

The month with the highest number of rainy days is June (17.2 days).
The month with the least rainy days is February (2.7 days).

Average snowfall in December
Clark, SD

Average snowfall in December - Clark, SD
  • Average snowfall in December: 3.74"

The months with the highest snowfall are January and December (3.74").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in December
Clark, SD

Average snowfall days in December - Clark, SD
  • Average snowfall days in December: 13 days

The month with the highest number of snowfall days is January (14.4 days).
The months with the least snowfall days are June, July and August (0 days).

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

Average daylight in December / Average sunshine in December - Clark, 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: 4h and 0min

The month with the most sunshine is July (Average sunshine: 10h and 42min).
The month with the least sunshine is January (Average sunshine: 3h and 36min).

Average sunshine days in December
Clark, SD

Average sunshine days in December - Clark, SD
  • Average sunshine days in December: 16.3 days

The month with the most sunshine days is October (19.1 days).
The month with the least sunshine days is June (10.3 days).

Average UV index in December
Clark, SD

Average UV index in December - Clark, 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
Clark, SD

Average cloud cover in December - Clark, SD
  • Average cloud cover in December: 59

The month with the most cloud cover is January (Cloud cover 63).
The month with the least cloud cover is August (Cloud cover 27).

Average visibility in December
Clark, SD

Average visibility in December - Clark, 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).

Clark, South Dakota, USA

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