December weather forecast
Wagner, SD

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Weather in December

December welcomes the biting Winter with cold winds and snowfall. The weather cools considerably compared to November. Residents frequently seek the comfort of indoor heating due to the cold temperatures. Snow starts covering the city, creating a picturesque winter wonderland setting. December sees the return of freezing temperatures in Wagner, with lows in the vicinity of 18.3°F (-7.6°C) and not-so-warm highs around 30.4°F (-0.9°C).

Temperature

December's arrival is marked by a notable drop in high-temperatures, falling from a frosty 46.4°F (8°C) in November to a freezing cold 30.4°F (-0.9°C). In December, Wagner's temperature tends to fall to an average low of 18.3°F (-7.6°C) during the night.

Humidity

The average relative humidity in December is 81%.

Rainfall

In December, the rain falls for 3.1 days. Throughout December, 0.59" (15mm) of precipitation is accumulated. Throughout the year, there are 104.1 rainfall days, and 14.29" (363mm) of precipitation is accumulated.

Snowfall

Months with snowfall are January through April, October through December. In December, it is snowing for 6.5 days. Throughout December, 1.22" (31mm) of snow is accumulated. In Wagner, South Dakota, during the entire year, snow falls for 32.8 days and aggregates up to 8.35" (212mm) of snow.

Daylight

With an average of 9h and 6min of daylight, December has the shortest days of the year.
On the first day of December in Wagner, sunrise is at 7:45 am and sunset at 4:59 pm. On the last day of the month, sunrise is at 8:04 am and sunset at 5:08 pm CST.

Sunshine

In December, the average sunshine in Wagner, South Dakota, is 4.9h.

UV index

The months with the lowest UV index in Wagner, South Dakota, are January, February, November and December, with an average maximum UV index of 2. A UV Index value of 2, and less, symbolizes a low health risk from exposure to the Sun's UV rays for average individuals.
Note: A daily maximum UV index of 2 in December translates into the following instructions:
While many people can endure lengthy sun exposure, it remains imperative to safeguard babies, children, and fair-skinned individuals. Direct exposure to the Sun's intense radiation around midday should be avoided for health reasons. Boost your sun resistance with garments that are densely woven yet spacious. Take warning! The intensity of the Sun's UV radiation can be nearly amplified twice due to snow reflection.
Updated: Feb 14, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

How cold is it in Wagner in December?

During December, Wagner experiences an average high-temperature of 30.4°F (-0.9°C) and a low-temperature of 18.3°F (-7.6°C). The average heat index (a.k.a. 'real feel', 'felt air temperature'), which combines air temperature and relative humidity, in August is computed to be 91.4°F (33°C).

What is the average humidity in December in Wagner?

In December, the average relative humidity in Wagner is 81%.

How much does it rain in Wagner in December?

In Wagner, South Dakota, during December, the rain falls for 3.1 days and regularly aggregates up to 0.59" (15mm) of precipitation.

How many days does it snow in December in Wagner?

In Wagner, South Dakota, in December, snow falls for 6.5 days, with typically accumulated 1.22" (31mm) of snow.

What is the month with the shortest days in Wagner?

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

What is the average length of the day in December in Wagner?

In Wagner, the average day length in December is 9h and 4min.

When is the sunrise / sunset in December in Wagner?

In December, on the first day of the month, sunrise is at 7:45 am and sunset at 4:59 pm. On the last day of the month, in Wagner, South Dakota, sunrise is at 8:04 am and sunset at 5:08 pm CST.

How many hours of sunshine does Wagner have in December?

In December, the average sunshine duration is 4.9h.

What is the month with the lowest UV index in Wagner?

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

How high is the UV index in December in Wagner?

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

Average temperature in December - Wagner, SD
  • Average high temperature in December: 30.4°F

The warmest month (with the highest average high temperature) is July (86.5°F).
The month with the lowest average high temperature is January (27.3°F).

  • Average low temperature in December: 18.3°F

The month with the highest average low temperature is July (65.7°F).
The coldest month (with the lowest average low temperature) is January (13.6°F).

Average pressure in December
Wagner, SD

Average pressure in December - Wagner, 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 (29.85"Hg).

Average wind speed in December
Wagner, SD

Average wind speed in December - Wagner, SD
  • 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 (8.3mph).

Average humidity in December
Wagner, SD

Average humidity in December - Wagner, 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 (62%).

Average rainfall in December
Wagner, SD

Average rainfall in December - Wagner, SD
  • Average rainfall in December: 0.59"

The wettest month (with the highest rainfall) is May (2.72").
The driest month (with the least rainfall) is February (0.31").

Average rainfall days in December
Wagner, SD

Average rainfall days in December - Wagner, SD
  • Average rainfall days in December: 3.1 days

The month with the highest number of rainy days is May (15.3 days).
The month with the least rainy days is January (2.9 days).

Average snowfall in December
Wagner, SD

Average snowfall in December - Wagner, SD
  • Average snowfall in December: 1.22"

The months with the highest snowfall are January and March (1.93").
The months with the least snowfall are May, June, July, August and September (0").

Average snowfall days in December
Wagner, SD

Average snowfall days in December - Wagner, SD
  • Average snowfall days in December: 6.5 days

The month with the highest number of snowfall days is January (8.2 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

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

Average daylight in December / Average sunshine in December - Wagner, 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: 11h and 6min).
The month with the least sunshine is January (Average sunshine: 4h and 42min).

Average sunshine days in December
Wagner, SD

Average sunshine days in December - Wagner, SD
  • Average sunshine days in December: 22.5 days

The month with the most sunshine days is November (23.4 days).
The month with the least sunshine days is June (12.3 days).

Average UV index in December
Wagner, SD

Average UV index in December - Wagner, SD
  • Average UV index in December: 2

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

Average cloud cover in December
Wagner, SD

Average cloud cover in December - Wagner, SD
  • Average cloud cover in December: 46

The month with the most cloud cover is January (Cloud cover 49).
The month with the least cloud cover is July (Cloud cover 23).

Average visibility in December
Wagner, SD

Average visibility in December - Wagner, 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).

Wagner, South Dakota, USA

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