December weather forecast
South Yankton, NE

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Weather in December

December, the first month of the winter in South Yankton, is still a freezing cold month, with an average temperature fluctuating between 18°F (-7.8°C) and 29.8°F (-1.2°C).

Temperature

South Yankton's weather undergoes a significant change with the arrival of December, as the average high-temperature drops from a frosty 45.9°F (7.7°C) in November to a subzero cold 29.8°F (-1.2°C). Throughout December nights, South Yankton experiences a consistent temperature average of 18°F (-7.8°C).

Humidity

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

Rainfall

In South Yankton, in December, it is raining for 3.7 days, with typically 1.18" (30mm) of accumulated precipitation. In South Yankton, during the entire year, the rain falls for 117.9 days and collects up to 21.93" (557mm) of precipitation.

Snowfall

January through May, October through December are months with snowfall. December is the month with the most snowfall. Snow falls for 8.1 days and accumulates 2.95" (75mm) of snow.

Daylight

The month with the shortest days is December, with an average of 9h and 6min of daylight.
On the first day of the month, sunrise is at 7:41 am and sunset at 4:56 pm. On the last day of December, in South Yankton, sunrise is at 8:00 am and sunset at 5:05 pm CST.

Sunshine

The average sunshine in December is 4.7h.

UV index

In December, the average daily maximum UV index is 2. A UV Index value of 2, and less, symbolizes a low threat to health from unprotected exposure to Sun's UV rays for the average person.
Note: A maximum daily UV index of 2 during December morphs into the following directions:
Extended time in the sun generally does not harm most, but those with sensitive skin, infants, and children should always be protected. The midday Sun can be dangerous due to its intense radiation; always find shade and reduce exposure. In bright sunlight, prioritize sunglasses that grant protection from UVA and UVB radiation. Be advised! The UV radiation from the Sun can be almost doubled due to the reflective properties of snow.
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Frequently asked questions

How cold is it in South Yankton in December?

December temperatures in South Yankton vary between a high-temperature of 29.8°F (-1.2°C) and a low-temperature of 18°F (-7.8°C). The average heat index (a.k.a. 'real feel', 'felt air temperature'), which calculates the temperature value influenced by the moisture in the air, in August is evaluated at 89.6°F (32°C).

What is the average humidity in December in South Yankton?

In South Yankton, Nebraska, the average relative humidity in December is 82%.

How much does it rain in South Yankton in December?

In South Yankton, Nebraska, in December, during 3.7 rainfall days, 1.18" (30mm) of precipitation is typically accumulated.

When does it snow the most in South Yankton?

December is the month with the most snowfall. Snow falls for 8.1 days and accumulates 2.95" (75mm) of snow.

How many days does it snow in December in South Yankton?

In December, in South Yankton, it is snowing for 8.1 days. Throughout December, 2.95" (75mm) of snow is accumulated.

What is the month with the shortest days in South Yankton?

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

What is the average length of the day in December in South Yankton?

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

What time are sunrise and sunset in December in South Yankton?

In December, on the first day of the month, sunrise is at 7:41 am and sunset at 4:56 pm. On the last day of the month, sunrise is at 8:00 am and sunset at 5:05 pm CST.

How long on average sun shines in December in South Yankton?

In December, the average sunshine duration in South Yankton is 4.7h.

What is the UV index intensity in December in South Yankton?

The average daily maximum UV index in December 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
South Yankton, NE

Average temperature in December - South Yankton, NE
  • Average high temperature in December: 29.8°F

The warmest month (with the highest average high temperature) is July (84.9°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).

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Average pressure in December
South Yankton, NE

Average pressure in December - South Yankton, NE
  • 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).

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Average wind speed in December
South Yankton, NE

Average wind speed in December - South Yankton, NE
  • Average wind speed in December: 10.3mph

The windiest month (with the highest average wind speed) is April (11.1mph).
The calmest month (with the lowest average wind speed) is July (7.9mph).

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Average humidity in December
South Yankton, NE

Average humidity in December - South Yankton, NE
  • Average humidity in December: 82%

The month with the highest relative humidity is January (85%).
The month with the lowest relative humidity is October (64%).

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Average rainfall in December
South Yankton, NE

Average rainfall in December - South Yankton, NE
  • Average rainfall in December: 1.18"

The wettest month (with the highest rainfall) is May (3.78").
The driest month (with the least rainfall) is February (0.59").

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Average rainfall days in December
South Yankton, NE

Average rainfall days in December - South Yankton, NE
  • Average rainfall days in December: 3.7 days

The month with the highest number of rainy days is June (17.4 days).
The month with the least rainy days is February (2.3 days).

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Average snowfall in December
South Yankton, NE

Average snowfall in December - South Yankton, NE
  • Average snowfall in December: 2.95"

The month with the highest snowfall is December (2.95").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in December
South Yankton, NE

Average snowfall days in December - South Yankton, NE
  • Average snowfall days in December: 8.1 days

The month with the highest number of snowfall days is January (9.7 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
South Yankton, NE

Average daylight in December / Average sunshine in December - South Yankton, NE
  • 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 48min).
The month with the least sunshine is January (Average sunshine: 4h and 24min).

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Average sunshine days in December
South Yankton, NE

Average sunshine days in December - South Yankton, NE
  • Average sunshine days in December: 21.3 days

The month with the most sunshine days is November (21.5 days).
The month with the least sunshine days is June (9.3 days).

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Average UV index in December
South Yankton, NE

Average UV index in December - South Yankton, NE
  • 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
South Yankton, NE

Average cloud cover in December - South Yankton, NE
  • Average cloud cover in December: 48

The month with the most cloud cover is January (Cloud cover 52).
The month with the least cloud cover is July (Cloud cover 25).

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Average visibility in December
South Yankton, NE

Average visibility in December - South Yankton, NE
  • 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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South Yankton, Nebraska, USA

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