December weather forecast
Brookings, SD

Weather in December

The first month of the winter, December, is also a subzero cold month in Brookings, South Dakota, with an average temperature fluctuating between 13.6°F (-10.2°C) and 25.7°F (-3.5°C).

Temperature

In Brookings, South Dakota, the average high-temperature in December declines considerably from a wintry 41.2°F (5.1°C) in November to a freezing cold 25.7°F (-3.5°C). In December, in Brookings, the average low-temperature is 13.6°F (-10.2°C).

Humidity

The average relative humidity in December in Brookings is 86%.

Rainfall

In Brookings, during 5.1 rainfall days, 1.1" (28mm) of precipitation is typically accumulated. Throughout the year, there are 125.5 rainfall days, and 21.65" (550mm) of precipitation is accumulated.

Snowfall

Months with snowfall in Brookings are January through May, October through December. In Brookings, during 13.3 snowfall days, 4.65" (118mm) of snow is typically accumulated. Throughout the year, there are 61.5 snowfall days, and 21.38" (543mm) of snow is accumulated.

Daylight

December has the shortest days of the year in Brookings, with an average of 8h and 55min of daylight.
On the first day of the month, sunrise is at 7:42 am and sunset at 4:49 pm. On the last day of December, sunrise is at 8:02 am and sunset at 4:57 pm CST.

Sunshine

In December, the average sunshine in Brookings is 4.2h.

UV index

In Brookings, the average daily maximum UV index in December is 2. A UV Index of 2, and less, symbolizes a minimal health hazard from exposure to the Sun's UV rays for the average person.
Note: The average daily UV index of 2 in December transform into the following instructions:
Extended sun exposure is not an issue for the majority. Children, infants, and fair-skinned individuals always need to be protected. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.
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FAQ

What is the temperature in December in Brookings?

In Brookings, in December, the average high-temperature is 25.7°F (-3.5°C), and the average low-temperature is 13.6°F (-10.2°C). The average heat index (a.k.a. 'feels like', 'apparent temperature'), which combines relative humidity and air temperature, in July is estimated at 86°F (30°C).

What is the average humidity in December in Brookings?

In Brookings, South Dakota, the average relative humidity in December is 86%.

How many days does it rain in December in Brookings?

In Brookings, in December, it is raining for 5.1 days, with typically 1.1" (28mm) of accumulated precipitation.

How much does it snow in Brookings in December?

In December, it is snowing for 13.3 days. Throughout December, 4.65" (118mm) of snow is accumulated.

What is the month with the shortest days in Brookings?

December has the shortest days of the year in Brookings, with an average of 8h and 55min of daylight.

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

In Brookings, South Dakota, the average day length in December is 8h and 55min.

When are sunrise and sunset in December in Brookings?

On the first day of December in Brookings, South Dakota, sunrise is at 7:42 am and sunset at 4:49 pm. On the last day of the month, sunrise is at 8:02 am and sunset at 4:57 pm CST.

How long on average sun shines in December in Brookings?

In Brookings, South Dakota, the average sunshine duration in December is 4.2h.

What is the UV index intensity in December in Brookings?

The average daily maximum UV index in December in Brookings is 2. A UV Index value of 2, and less, symbolizes a low health threat from unprotected exposure to 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
Brookings, SD

Average temperature in December - Brookings, SD
  • Average high temperature in December: 25.7°F

The warmest month (with the highest average high temperature) is July (81.3°F).
The month with the lowest average high temperature is January (20.7°F).

  • Average low temperature in December: 13.6°F

The month with the highest average low temperature is July (62.2°F).
The coldest month (with the lowest average low temperature) is January (7°F).

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Average pressure in December
Brookings, SD

Average pressure in December - Brookings, SD
  • Average pressure in December: 30.13"Hg

The months with the highest atmospheric pressure are January and February (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.86"Hg).

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Average wind speed in December
Brookings, SD

Average wind speed in December - Brookings, SD
  • Average wind speed in December: 10.7mph

The windiest month (with the highest average wind speed) is April (11.5mph).
The calmest month (with the lowest average wind speed) is July (8.4mph).

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Average humidity in December
Brookings, SD

Average humidity in December - Brookings, SD
  • Average humidity in December: 86%

The month with the highest relative humidity is January (90%).
The month with the lowest relative humidity is October (68%).

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Average rainfall in December
Brookings, SD

Average rainfall in December - Brookings, SD
  • Average rainfall in December: 1.1"

The wettest month (with the highest rainfall) is June (3.46").
The driest month (with the least rainfall) is November (0.67").

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Average rainfall days in December
Brookings, SD

Average rainfall days in December - Brookings, SD
  • Average rainfall days in December: 5.1 days

The month with the highest number of rainy days is June (19.8 days).
The month with the least rainy days is January (3.2 days).

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Average snowfall in December
Brookings, SD

Average snowfall in December - Brookings, SD
  • Average snowfall in December: 4.65"

The month with the highest snowfall is February (4.69").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in December
Brookings, SD

Average snowfall days in December - Brookings, SD
  • Average snowfall days in December: 13.3 days

The month with the highest number of snowfall days is January (14.4 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
Brookings, SD

Average daylight in December / Average sunshine in December - Brookings, SD
  • Average daylight in December: 8h and 55min

The month with the longest days is June (Average daylight: 15h and 28min).
The month with the shortest days is December (Average daylight: 8h and 55min).

  • Average sunshine in December: 4h and 12min

The month with the most sunshine is July (Average sunshine: 10h and 36min).
The month with the least sunshine is January (Average sunshine: 3h and 48min).

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Average sunshine days in December
Brookings, SD

Average sunshine days in December - Brookings, SD
  • Average sunshine days in December: 16.1 days

The month with the most sunshine days is November (18.9 days).
The month with the least sunshine days is June (8.3 days).

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Average UV index in December
Brookings, SD

Average UV index in December - Brookings, 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
Brookings, SD

Average cloud cover in December - Brookings, SD
  • Average cloud cover in December: 56

The month with the most cloud cover is January (Cloud cover 59).
The months with the least cloud cover are July and August (Cloud cover 28).

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Average visibility in December
Brookings, SD

Average visibility in December - Brookings, SD
  • Average visibility in December: 6mi

The months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is January (5mi).

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