December weather forecast
Oglala, SD

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Weather in December

December, the first month of the winter in Oglala, is still a cold month, with an average temperature fluctuating between 18.7°F (-7.4°C) and 32.4°F (0.2°C).

Temperature

With its high average temperature of 32.4°F (0.2°C) and a low of 18.7°F (-7.4°C), December is regarded as the coldest month.

Humidity

The average relative humidity in December is 76%.

Rainfall

In December, in Oglala, the rain falls for 2.5 days. Throughout December, 0.87" (22mm) of precipitation is accumulated. Throughout the year, there are 86.7 rainfall days, and 13.66" (347mm) of precipitation is accumulated.

Snowfall

Months with snowfall are January through May, September through December. In Oglala, in December, snow falls for 8.2 days, with typically accumulated 3.9" (99mm) of snow. In Oglala, during the entire year, snow falls for 47.4 days and aggregates up to 22.72" (577mm) of snow.

Daylight

The month with the shortest days in Oglala is December, with an average of 9h and 0min of daylight.
On the first day of the month, sunrise is at 7:03 am and sunset at 4:16 pm. On the last day of December, sunrise is at 7:22 am and sunset at 4:25 pm MST.

Sunshine

In Oglala, the average sunshine in December is 5.7h.

UV index

The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 2. A UV Index of 2, and less, symbolizes a low threat to health from unprotected exposure to Sun's UV rays for average individuals.
Note: A maximum high UV index of 2 in December translates into the following recommendations:
Although the majority can endure up to an hour in the sun without burns, children always require sun protection. Avoiding the Sun's peak radiation during midday hours is essential for health and safety. Protect your eyes, ears, face, and neck from the Sun by wearing a wide-brimmed hat. Heed this! Snow reflection can almost augment the UV radiation of the sun by double.

Frequently asked questions

What month is the coldest?

Oglala's coldest weather arrives in December, when temperatures average a high of 32.4°F (0.2°C) and a low of 18.7°F (-7.4°C).

How cold is December?

In December, the average high-temperature and low-temperature are 32.4°F (0.2°C) and 18.7°F (-7.4°C) respectively. The average heat index (a.k.a. 'apparent temperature', 'feels like'), which calculates the temperature value influenced by the moisture in the air, in August is calculated to be 86°F (30°C).

What is the average humidity in December?

The average relative humidity in December is 76%.

How many days does it rain in December?

In Oglala, in December, it is raining for 2.5 days, with typically 0.87" (22mm) of accumulated precipitation.

How many days does it snow in December in Oglala?

In Oglala, during December, snow falls for 8.2 days and regularly aggregates up to 3.9" (99mm) of snow.

What is the month with the shortest days?

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

How many hours of daylight does Oglala have in December?

In December, the average day length is 9h and 3min.

When is the sunrise / sunset in December?

On the first day of December, sunrise is at 7:03 am and sunset at 4:16 pm. On the last day of the month, sunrise is at 7:22 am and sunset at 4:25 pm MST.

How many hours of sunshine does Oglala have in December?

The average sunshine duration in December is 5.7h.

What are the months with the lowest UV index?

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

What is the UV index reading in December?

In Oglala, the average daily maximum UV index in December is 2. A UV Index estimate of 2, and below, represents a low health risk from 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
Oglala, SD

Average temperature in December - Oglala, SD
  • Average high temperature in December: 32.4°F

The warmest month (with the highest average high temperature) is July (87.6°F).
The month with the lowest average high temperature is December (32.4°F).

  • Average low temperature in December: 18.7°F

The month with the highest average low temperature is July (65.5°F).
The coldest month (with the lowest average low temperature) is January (18.1°F).

Average pressure in December
Oglala, SD

Average pressure in December - Oglala, SD
  • Average pressure in December: 30.12"Hg

The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.85"Hg).

Average wind speed in December
Oglala, SD

Average wind speed in December - Oglala, SD
  • Average wind speed in December: 10.4mph

The windiest month (with the highest average wind speed) is April (12.2mph).
The calmest month (with the lowest average wind speed) is August (10.2mph).

Average humidity in December
Oglala, SD

Average humidity in December - Oglala, SD
  • Average humidity in December: 76%

The month with the highest relative humidity is January (80%).
The month with the lowest relative humidity is August (48%).

Average rainfall in December
Oglala, SD

Average rainfall in December - Oglala, SD
  • Average rainfall in December: 0.87"

The wettest month (with the highest rainfall) is May (2.13").
The driest month (with the least rainfall) is January (0.55").

Average rainfall days in December
Oglala, SD

Average rainfall days in December - Oglala, SD
  • Average rainfall days in December: 2.5 days

The month with the highest number of rainy days is May (13.1 days).
The months with the least rainy days are February and December (2.5 days).

Average snowfall in December
Oglala, SD

Average snowfall in December - Oglala, SD
  • Average snowfall in December: 3.9"

The month with the highest snowfall is February (4.02").
The months with the least snowfall are June, July and August (0").

Average snowfall days in December
Oglala, SD

Average snowfall days in December - Oglala, SD
  • Average snowfall days in December: 8.2 days

The month with the highest number of snowfall days is February (11.5 days).
The months with the least snowfall days are June, July and August (0 days).

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

Average daylight in December / Average sunshine in December - Oglala, SD
  • Average daylight in December: 9h and 0min

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 0min).

  • Average sunshine in December: 5h and 4min

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 12min).

Average sunshine days in December
Oglala, SD

Average sunshine days in December - Oglala, SD
  • Average sunshine days in December: 20.8 days

The month with the most sunshine days is September (22.8 days).
The month with the least sunshine days is April (13.2 days).

Average UV index in December
Oglala, SD

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

The month with the highest UV index is July (UV index 7).
The months with the lowest UV index are January, February, November and December (UV index 2).

Average cloud cover in December
Oglala, SD

Average cloud cover in December - Oglala, SD
  • Average cloud cover in December: 39

The month with the most cloud cover is February (Cloud cover 44).
The month with the least cloud cover is August (Cloud cover 16).

Average visibility in December
Oglala, SD

Average visibility in December - Oglala, 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).

Oglala, South Dakota, USA

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