December weather forecast
Plankinton, SD

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Weather in December

The first month of the winter, December, is also a subzero cold month in Plankinton, South Dakota, with an average temperature varying between 16°F (-8.9°C) and 28.6°F (-1.9°C).

Temperature

Plankinton's transition into December is marked by a distinct drop in the average high-temperature, reducing from a frosty 45°F (7.2°C) in November to a subzero cold 28.6°F (-1.9°C). Plankinton sees an average low-temperature of 16°F (-8.9°C) during December.

Humidity

In December, the average relative humidity in Plankinton is 83%.

Rainfall

In December, the rain falls for 2.9 days. Throughout December, 0.51" (13mm) of precipitation is accumulated. In Plankinton, during the entire year, the rain falls for 93.2 days and collects up to 11.3" (287mm) of precipitation.

Snowfall

Months with snowfall in Plankinton are January through April, October through December. In Plankinton, in December, during 7.5 snowfall days, 1.1" (28mm) of snow is typically accumulated. Throughout the year, there are 35.3 snowfall days, and 7.17" (182mm) of snow is accumulated.

Daylight

December has the shortest days of the year, with an average of 9h and 0min of daylight.
On the first day of the month, sunrise is at 7:48 am and sunset at 4:58 pm. On the last day of December, sunrise is at 8:07 am and sunset at 5:07 pm CST.

Sunshine

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

UV index

In December, the average daily maximum UV index in Plankinton, South Dakota, is 2. A UV Index value of 2, and less, symbolizes a low threat to health from exposure to the Sun's UV rays for ordinary individuals.
Note: The maximum daily UV index, 2 in December, converts into the following recommendations:
Extended exposure to the sun should always be avoided by children, infants, and those with sensitive skin. The best time to avoid the Sun's harmful UV radiation is during midday when it's most potent. Sun-related eye harm can be minimized with proper sunglasses offering UVA and UVB coverage. Take precaution! The reflection from snow can almost double the UV radiation of the Sun.
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Frequently asked questions

How cold is it in Plankinton in December?

An average high-temperature, in December, in Plankinton, is 28.6°F (-1.9°C) and the average low-temperature is 16°F (-8.9°C). In August, the average heat index (a.k.a. 'feels like', 'real feel'), which factors the actual air temperature with the relative humidity, is computed to be 89.6°F (32°C).

What is the average humidity in December in Plankinton?

In December, the average relative humidity in Plankinton, South Dakota, is 83%.

How many days does it rain in December in Plankinton?

In Plankinton, in December, during 2.9 rainfall days, 0.51" (13mm) of precipitation is typically accumulated.

How much does it snow in Plankinton in December?

In December, it is snowing for 7.5 days. Throughout December, 1.1" (28mm) of snow is accumulated.

What is the month with the shortest days in Plankinton?

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

How many hours of daylight does Plankinton have in December?

In Plankinton, the average day length in December is 8h and 59min.

When is the sunrise / sunset in December in Plankinton?

On the first day of December in Plankinton, South Dakota, sunrise is at 7:48 am and sunset at 4:58 pm. On the last day of the month, sunrise is at 8:07 am and sunset at 5:07 pm CST.

How long on average sun shines in December in Plankinton?

The average sunshine duration in December in Plankinton, South Dakota, is 4.7h.

How high is the UV index in December in Plankinton?

In December, the average daily maximum UV index is 2. A UV Index reading 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
Plankinton, SD

Average temperature in December - Plankinton, SD
  • Average high temperature in December: 28.6°F

The warmest month (with the highest average high temperature) is July (85.6°F).
The month with the lowest average high temperature is January (24.4°F).

  • Average low temperature in December: 16°F

The month with the highest average low temperature is July (64.6°F).
The coldest month (with the lowest average low temperature) is January (10.2°F).

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Average pressure in December
Plankinton, SD

Average pressure in December - Plankinton, 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).

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Average wind speed in December
Plankinton, SD

Average wind speed in December - Plankinton, SD
  • Average wind speed in December: 10.1mph

The windiest month (with the highest average wind speed) is April (11.2mph).
The calmest month (with the lowest average wind speed) is July (8.6mph).

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Average humidity in December
Plankinton, SD

Average humidity in December - Plankinton, SD
  • Average humidity in December: 83%

The month with the highest relative humidity is January (87%).
The months with the lowest relative humidity are September and October (63%).

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Average rainfall in December
Plankinton, SD

Average rainfall in December - Plankinton, SD
  • Average rainfall in December: 0.51"

The wettest month (with the highest rainfall) is May (1.65").
The driest months (with the least rainfall) are February and November (0.28").

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Average rainfall days in December
Plankinton, SD

Average rainfall days in December - Plankinton, SD
  • Average rainfall days in December: 2.9 days

The month with the highest number of rainy days is June (13.6 days).
The month with the least rainy days is February (1.9 days).

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Average snowfall in December
Plankinton, SD

Average snowfall in December - Plankinton, SD
  • Average snowfall in December: 1.1"

The month with the highest snowfall is February (1.42").
The months with the least snowfall are May, June, July, August and September (0").

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Average snowfall days in December
Plankinton, SD

Average snowfall days in December - Plankinton, SD
  • Average snowfall days in December: 7.5 days

The month with the highest number of snowfall days is January (8.7 days).
The months with the least snowfall days are June, July, August and September (0 days).

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

Average daylight in December / Average sunshine in December - Plankinton, 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 4min

The month with the most sunshine is July (Average sunshine: 11h and 6min).
The month with the least sunshine is January (Average sunshine: 4h and 24min).

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Average sunshine days in December
Plankinton, SD

Average sunshine days in December - Plankinton, SD
  • Average sunshine days in December: 21.9 days

The month with the most sunshine days is November (23.4 days).
The month with the least sunshine days is June (12.8 days).

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Average UV index in December
Plankinton, SD

Average UV index in December - Plankinton, 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).

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Average cloud cover in December
Plankinton, SD

Average cloud cover in December - Plankinton, SD
  • Average cloud cover in December: 49

The month with the most cloud cover is January (Cloud cover 52).
The month with the least cloud cover is July (Cloud cover 22).

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Average visibility in December
Plankinton, SD

Average visibility in December - Plankinton, 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).

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Plankinton, South Dakota, USA

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