December weather forecast
New Underwood, SD

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Weather in December

December, the first month of the winter in New Underwood, is also a wintry month, with an average temperature varying between 18.7°F (-7.4°C) and 32.5°F (0.3°C).

Temperature

The lowest temperatures are recorded in December, with averages reaching a high of 32.5°F (0.3°C) and a low of 18.7°F (-7.4°C).

Humidity

In December, the average relative humidity is 74%.

Rainfall

In New Underwood, in December, it is raining for 4.8 days, with typically 0.63" (16mm) of accumulated precipitation. In New Underwood, South Dakota, during the entire year, the rain falls for 118.8 days and collects up to 15.39" (391mm) of precipitation.

Snowfall

Months with snowfall in New Underwood are January through May, September through December. In December, it is snowing for 8.1 days. Throughout December, 2.64" (67mm) of snow is accumulated. Throughout the year, there are 50.4 snowfall days, and 24.41" (620mm) of snow is accumulated.

Daylight

December has the shortest days of the year in New Underwood, South Dakota, with an average of 8h and 54min of daylight.
On the first day of the month, sunrise is at 7:07 am and sunset at 4:14 pm. On the last day of December, sunrise is at 7:26 am and sunset at 4:23 pm MST.

Sunshine

The average sunshine in December in New Underwood is 6h.

UV index

January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index in New Underwood. A UV Index of 2, and less, symbolizes a minimal health hazard from unprotected exposure to Sun's UV rays for average individuals.
Note: The maximum daily UV index, 2 in December, converts into the following recommendations:
Babies, children, and those with sensitive skin should always avoid extended periods in the sun. The most potent solar radiation is around mid-day, so one should minimize exposure to direct sunlight during this period. Using UVA and UVB-protective sunglasses and sun-protective clothing is effective against UV radiation. Mind this! Nearly twice the UV radiation from the Sun can be reflected by the snow.
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Frequently asked questions

What is the coldest month in New Underwood?

December, with its high-temperature average of 32.5°F (0.3°C) and a low-temperature average of 18.7°F (-7.4°C), is the coldest month in New Underwood, South Dakota.

How cold is it in New Underwood in December?

The average high-temperature and low-temperature during December are 32.5°F (0.3°C) and 18.7°F (-7.4°C) respectively. In August, the average heat index (a.k.a. 'apparent temperature', 'real feel'), which takes the relative humidity and factors it into the air temperature reading, is appraised at 84.2°F (29°C).

What is the average humidity in December in New Underwood?

The average relative humidity in December in New Underwood, South Dakota, is 74%.

How much does it rain in New Underwood in December?

In December, the rain falls for 4.8 days. Throughout December, 0.63" (16mm) of precipitation is accumulated.

How many days does it snow in December in New Underwood?

In December, in New Underwood, it is snowing for 8.1 days. Throughout December, 2.64" (67mm) of snow is accumulated.

What is the month with the shortest days in New Underwood?

With an average of 8h and 54min of daylight, December has the shortest days of the year in New Underwood, South Dakota.

How many hours of daylight does New Underwood have in December?

The average day length in December is 8h and 57min.

When is the sunrise / sunset in December in New Underwood?

On the first day of December, sunrise is at 7:07 am and sunset at 4:14 pm. On the last day of the month, sunrise is at 7:26 am and sunset at 4:23 pm MST.

How long on average sun shines in December in New Underwood?

The average sunshine duration in December in New Underwood, South Dakota, is 6h.

When is the lowest UV index in New Underwood?

January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index in New Underwood, South Dakota.

What is the UV index reading in December in New Underwood?

In December, the average daily maximum UV index is 2. A UV Index value of 2, and less, symbolizes a minimal hazard to health 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
New Underwood, SD

Average temperature in December - New Underwood, SD
  • Average high temperature in December: 32.5°F

The warmest month (with the highest average high temperature) is July (84.7°F).
The month with the lowest average high temperature is December (32.5°F).

  • Average low temperature in December: 18.7°F

The month with the highest average low temperature is July (63.3°F).
The coldest month (with the lowest average low temperature) is February (17.8°F).

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Average pressure in December
New Underwood, SD

Average pressure in December - New Underwood, 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
New Underwood, SD

Average wind speed in December - New Underwood, SD
  • Average wind speed in December: 8.9mph

The windiest month (with the highest average wind speed) is April (10.3mph).
The calmest month (with the lowest average wind speed) is August (8.2mph).

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Average humidity in December
New Underwood, SD

Average humidity in December - New Underwood, SD
  • Average humidity in December: 74%

The month with the highest relative humidity is January (77%).
The months with the lowest relative humidity are August and September (50%).

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Average rainfall in December
New Underwood, SD

Average rainfall in December - New Underwood, SD
  • Average rainfall in December: 0.63"

The wettest month (with the highest rainfall) is May (2.28").
The driest month (with the least rainfall) is January (0.43").

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Average rainfall days in December
New Underwood, SD

Average rainfall days in December - New Underwood, SD
  • Average rainfall days in December: 4.8 days

The month with the highest number of rainy days is May (17.1 days).
The month with the least rainy days is December (4.8 days).

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Average snowfall in December
New Underwood, SD

Average snowfall in December - New Underwood, SD
  • Average snowfall in December: 2.64"

The month with the highest snowfall is April (5.43").
The months with the least snowfall are June, July and August (0").

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Average snowfall days in December
New Underwood, SD

Average snowfall days in December - New Underwood, SD
  • Average snowfall days in December: 8.1 days

The month with the highest number of snowfall days is February (10.5 days).
The months with the least snowfall days are June, July and August (0 days).

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Average daylight in December /
Average sunshine in December
New Underwood, SD

Average daylight in December / Average sunshine in December - New Underwood, SD
  • Average daylight in December: 8h and 5min

The month with the longest days is June (Average daylight: 15h and 24min).
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 48min).
The month with the least sunshine is February (Average sunshine: 5h and 54min).

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Average sunshine days in December
New Underwood, SD

Average sunshine days in December - New Underwood, SD
  • Average sunshine days in December: 19.6 days

The month with the most sunshine days is November (20.2 days).
The month with the least sunshine days is May (11 days).

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Average UV index in December
New Underwood, SD

Average UV index in December - New Underwood, SD
  • Average UV index in December: 2

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

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Average cloud cover in December
New Underwood, SD

Average cloud cover in December - New Underwood, SD
  • Average cloud cover in December: 36

The months with the most cloud cover are February and April (Cloud cover 38).
The month with the least cloud cover is August (Cloud cover 16).

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Average visibility in December
New Underwood, SD

Average visibility in December - New Underwood, 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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New Underwood, South Dakota, USA

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