December weather forecast
North Sioux City, SD

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Weather in December

December, the final month of the year in North Sioux City, is characterized by its cold temperatures and considerable snowfall. Building on the pattern started in November, December gets colder, promising a white Christmas. This trend continues into the following month, January, which is typically the year's coldest month. While winter takes hold, day length shortens, leading to longer nights. In terms of precipitation, December receives a significant 2.56" (65mm) of snowfall, setting the tone for the following winter months.

Temperature

As December begins in North Sioux City, there is a noticeable decrease in the average high-temperature, falling from a frosty 45.9°F (7.7°C) in November to a freezing cold 30.7°F (-0.7°C). The temperature dips to an average of 18.7°F (-7.4°C) during December nights.

Humidity

In North Sioux City, the average relative humidity in December is 81%.

Rainfall

In December, in North Sioux City, the rain falls for 4.1 days. Throughout December, 1.22" (31mm) of precipitation is accumulated. In North Sioux City, South Dakota, during the entire year, the rain falls for 122 days and collects up to 21.61" (549mm) of precipitation.

Snowfall

January through May, October through December are months with snowfall. In December, it is snowing for 8.4 days. Throughout December, 2.56" (65mm) of snow is accumulated. Throughout the year, there are 38 snowfall days, and 13.23" (336mm) of snow is accumulated.

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 7:36 am and sunset at 4:53 pm. On the last day of December, in North Sioux City, sunrise is at 7:55 am and sunset at 5:03 pm CST.

Sunshine

The average sunshine in December is 4.8h.

UV index

In North Sioux City, the average daily maximum UV index in December is 2. A UV Index of 2, and less, symbolizes a low health risk from unprotected exposure to Sun's UV rays for average individuals.
Note: In December, a daily UV index of 2 turns into the following recommendations:
While most individuals can withstand prolonged sun exposure, it is imperative that babies, children, and those with sensitive skin always be shielded. Considering the strength of solar radiation at midday, one should avoid direct Sun exposure. Arm yourself against UV rays' harm with protective apparel and UV-filtering shades. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.
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Frequently asked questions

How cold is it in North Sioux City in December?

In North Sioux City, in December, the average high-temperature is 30.7°F (-0.7°C), and the average low-temperature is 18.7°F (-7.4°C). In August, the average heat index (a.k.a. 'apparent temperature', 'real feel'), which combines relative humidity and air temperature, is appraised at 87.8°F (31°C).

What is the average humidity in December in North Sioux City?

In December, the average relative humidity in North Sioux City, South Dakota, is 81%.

How much does it rain in North Sioux City in December?

In North Sioux City, South Dakota, in December, during 4.1 rainfall days, 1.22" (31mm) of precipitation is typically accumulated.

How much does it snow in North Sioux City in December?

In North Sioux City, in December, snow falls for 8.4 days, with typically accumulated 2.56" (65mm) of snow.

What is the month with the shortest days in North Sioux City?

December has the shortest days of the year in North Sioux City, with an average of 9h and 6min of daylight.

How many hours of daylight does North Sioux City have in December?

The average day length in December in North Sioux City, South Dakota, is 9h and 7min.

When are sunrise and sunset in December in North Sioux City?

On the first day of December in North Sioux City, sunrise is at 7:36 am and sunset at 4:53 pm. On the last day of the month, sunrise is at 7:55 am and sunset at 5:03 pm CST.

How long on average sun shines in December in North Sioux City?

In North Sioux City, the average sunshine duration in December is 4.8h.

How high is the UV index in December in North Sioux City?

In December, the average daily maximum UV index is 2. A UV Index estimate of 2, and below, represents a minimal health vulnerability from exposure to the Sun's 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
North Sioux City, SD

Average temperature in December - North Sioux City, SD
  • Average high temperature in December: 30.7°F

The warmest month (with the highest average high temperature) is July (84°F).
The month with the lowest average high temperature is January (27°F).

  • Average low temperature in December: 18.7°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 (13.1°F).

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Average pressure in December
North Sioux City, SD

Average pressure in December - North Sioux City, SD
  • 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 (29.86"Hg).

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Average wind speed in December
North Sioux City, SD

Average wind speed in December - North Sioux City, SD
  • Average wind speed in December: 10.2mph

The windiest month (with the highest average wind speed) is April (11.1mph).
The calmest month (with the lowest average wind speed) is July (7.6mph).

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Average humidity in December
North Sioux City, SD

Average humidity in December - North Sioux City, SD
  • Average humidity in December: 81%

The month with the highest relative humidity is January (84%).
The month with the lowest relative humidity is October (65%).

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Average rainfall in December
North Sioux City, SD

Average rainfall in December - North Sioux City, SD
  • Average rainfall in December: 1.22"

The wettest months (with the highest rainfall) are May and June (3.03").
The driest month (with the least rainfall) is February (0.67").

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Average rainfall days in December
North Sioux City, SD

Average rainfall days in December - North Sioux City, SD
  • Average rainfall days in December: 4.1 days

The month with the highest number of rainy days is June (17.8 days).
The month with the least rainy days is February (3.3 days).

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Average snowfall in December
North Sioux City, SD

Average snowfall in December - North Sioux City, SD
  • Average snowfall in December: 2.56"

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

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Average snowfall days in December
North Sioux City, SD

Average snowfall days in December - North Sioux City, SD
  • Average snowfall days in December: 8.4 days

The month with the highest number of snowfall days is January (9.6 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
North Sioux City, SD

Average daylight in December / Average sunshine in December - North Sioux City, SD
  • 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 5min

The month with the most sunshine is July (Average sunshine: 10h and 42min).
The month with the least sunshine is January (Average sunshine: 4h and 24min).

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Average sunshine days in December
North Sioux City, SD

Average sunshine days in December - North Sioux City, SD
  • Average sunshine days in December: 20.1 days

The month with the most sunshine days is November (20.9 days).
The month with the least sunshine days is June (9.7 days).

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Average UV index in December
North Sioux City, SD

Average UV index in December - North Sioux City, SD
  • Average UV index in December: 2

The months with the highest UV index are June and July (UV index 6).
The month with the lowest UV index is January (UV index 1).

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Average cloud cover in December
North Sioux City, SD

Average cloud cover in December - North Sioux City, SD
  • 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 26).

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Average visibility in December
North Sioux City, SD

Average visibility in December - North Sioux City, 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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North Sioux City, South Dakota, USA

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