December weather forecast
Brookings, SD

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Weather in December

December hails as the harbinger of the festive season as well as the spirited cold in Brookings. Since the temperatures sink to as low as 25.7°F (-3.5°C), and snowfall sums up to 4.65" (118mm), a white Christmas graces the city. The dwindling year brings with it the winter chill, coloring the cityscape in crisp shades of icy blue. With the cycle from December to January, Brookings plunges deeper into the winter cornucopia. Premiership of the New Year welcomes the frost-clad city into another annual chapter of its climatic journey.

Temperature

Brookings, South Dakota, sees a considerable decrease in average high-temperatures during December, falling from a wintry 41.2°F (5.1°C) in November to a freezing cold 25.7°F (-3.5°C). Throughout the month of December, Brookings sees a steady low-temperature average of 13.6°F (-10.2°C).

Humidity

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

Rainfall

In Brookings, in December, it is raining for 5.1 days, with typically 1.1" (28mm) of accumulated precipitation. In Brookings, during the entire year, the rain falls for 125.5 days and collects up to 21.65" (550mm) of precipitation.

Snowfall

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

Daylight

With an average of 8h and 54min of daylight, December has the shortest days of the year.
On the first day of December, sunrise is at 7:43 am and sunset at 4:49 pm. On the last day of the month, sunrise is at 8:02 am and sunset at 4:58 pm CST.

Sunshine

The average sunshine in December is 4.2h.

UV index

In December, the average daily maximum UV index in Brookings, South Dakota, is 2. A UV Index of 2, and less, symbolizes a low health risk from unsafe exposure to UV radiation for average individuals.
Note: In December, the UV index of 2 transforms into the following advice:
While most people are not greatly affected by extended sun exposure, those with fair skin, babies, and children must always have protection. Considering the Sun's intensity during midday, it's wise to minimize direct exposure. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.

Frequently asked questions

How cold is December?

During December, Brookings experiences an average high-temperature of 25.7°F (-3.5°C) and a low-temperature of 13.6°F (-10.2°C). The average heat index (a.k.a. 'feels like', 'apparent temperature'), which takes the relative humidity and factors it into the air temperature reading, in July is estimated at 86°F (30°C).

What is the average humidity in December in Brookings?

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

How many days does it rain in December?

In Brookings, in December, during 5.1 rainfall days, 1.1" (28mm) of precipitation is typically accumulated.

How much does it snow 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?

The month with the shortest days is December, with an average of 8h and 54min of daylight.

How many hours of daylight does Brookings have in December?

In December, the average day length is 8h and 55min.

What time are sunrise and sunset in December?

On the first day of December, sunrise is at 7:43 am and sunset at 4:49 pm. On the last day of the month, sunrise is at 8:02 am and sunset at 4:58 pm CST.

How long on average sun shines in December?

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

What is the UV index reading in December?

The average daily maximum UV index in December is 2. A UV Index of 2, and less, symbolizes a minimal hazard to health 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).

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).

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).

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%).

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").

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).

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").

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).

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 5min

The month with the longest days is June (Average daylight: 15h and 30min).
The month with the shortest days is December (Average daylight: 8h and 54min).

  • Average sunshine in December: 4h and 1min

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).

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).

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).

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).

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).

Brookings, South Dakota, USA

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