Contents
- Weather in December
- Frequently asked questions
- Average temperature in December
- Average pressure in December
- Average wind speed in December
- Average humidity in December
- Average rainfall in December
- Average rainfall days in December
- Average snowfall in December
- Average snowfall days in December
- Average daylight in December
- Average sunshine in December
- Average sunshine days in December
- Average UV index in December
- Average cloud cover in December
- Average visibility in December
Weather in December
Temperature
White Rock sees a considerable decrease in average high-temperatures during December, falling from a cold 40.1°F (4.5°C) in November to a subzero cold 23.9°F (-4.5°C). December nights in White Rock experience a consistent temperature drop to an extreme cold 12.7°F (-10.7°C).Humidity
In White Rock, the average relative humidity in December is 85%.Rainfall
In White Rock, South Dakota, in December, during 3.7 rainfall days, 0.94" (24mm) of precipitation is typically accumulated. Throughout the year, in White Rock, there are 102 rainfall days, and 19.17" (487mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through May, October through December. The month with the most snowfall is December, when snow falls for 11.5 days and typically aggregates up to 4.45" (113mm) of snow.Daylight
The month with the shortest days is December, with an average of 8h and 42min of daylight.On the first day of the month, sunrise is at 7:48 am and sunset at 4:42 pm. On the last day of December, sunrise is at 8:07 am and sunset at 4:51 pm CST.
Sunshine
In White Rock, South Dakota, the average sunshine in December is 3.8h.UV index
The months with the lowest UV index are January and December, with an average maximum UV index of 1. A UV Index of 2, and less, symbolizes a minimal health vulnerability from exposure to the Sun's UV rays for average individuals.Note: In December, a daily maximum UV index of 1 leads to the following instructions:
Many can withstand an hour in the sun without burning, yet children must always have protection against sunlight. The Sun's radiation is especially intense around midday; try to stay in shade during this period. Arm yourself against UV rays' harm with protective apparel and UV-filtering shades. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is it in White Rock in December?
What is the average humidity in December in White Rock?
How many days does it rain in December in White Rock?
What is the snowiest month in White Rock?
How many days does it snow in December in White Rock?
What is the month with the shortest days in White Rock?
How many hours of daylight does White Rock have in December?
When is the sunrise / sunset in December in White Rock?
How many hours of sunshine does White Rock have in December?
What is the month with the lowest UV index in White Rock?
How high is the UV index in December in White Rock?
Average temperature in December
White Rock, SD
- Average high temperature in December: 23.9°F
The warmest months (with the highest average high temperature) are July and August (81.3°F).
The month with the lowest average high temperature is January (18.7°F).
- Average low temperature in December: 12.7°F
The month with the highest average low temperature is July (62.1°F).
The coldest month (with the lowest average low temperature) is January (4.8°F).
Average pressure in December
White Rock, SD
- Average pressure in December: 30.12"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
White Rock, SD
- Average wind speed in December: 9.9mph
The windiest month (with the highest average wind speed) is April (10.6mph).
The calmest month (with the lowest average wind speed) is July (8mph).
Average humidity in December
White Rock, SD
- Average humidity in December: 85%
The month with the highest relative humidity is January (89%).
The month with the lowest relative humidity is September (65%).
Average rainfall in December
White Rock, SD
- Average rainfall in December: 0.94"
The wettest months (with the highest rainfall) are June and July (3.03").
The driest month (with the least rainfall) is February (0.55").
Average rainfall days in December
White Rock, SD
- Average rainfall days in December: 3.7 days
The month with the highest number of rainy days is June (15.4 days).
The month with the least rainy days is February (2 days).
Average snowfall in December
White Rock, SD
- Average snowfall in December: 4.45"
The month with the highest snowfall is December (4.45").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
White Rock, SD
- Average snowfall days in December: 11.5 days
The month with the highest number of snowfall days is January (12.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
White Rock, SD
- Average daylight in December: 8h and 4min
The month with the longest days is June (Average daylight: 15h and 42min).
The month with the shortest days is December (Average daylight: 8h and 42min).
- Average sunshine in December: 3h and 5min
The month with the most sunshine is July (Average sunshine: 10h and 48min).
The month with the least sunshine is January (Average sunshine: 3h and 24min).
Average sunshine days in December
White Rock, SD
- Average sunshine days in December: 17.6 days
The month with the most sunshine days is September (19.5 days).
The month with the least sunshine days is June (12.4 days).
Average UV index in December
White Rock, SD
- Average UV index in December: 1
The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in December
White Rock, SD
- Average cloud cover in December: 59
The month with the most cloud cover is January (Cloud cover 63).
The month with the least cloud cover is August (Cloud cover 25).
Average visibility in December
White Rock, SD
- Average visibility in December: 6mi
The months with the highest visibility are March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January and February (5mi).
White Rock, South Dakota, USA
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