December weather forecastWhite Horse, SD
December
Weather in December
The first month of the winter, December, is still a freezing cold month in White Horse, South Dakota, with temperature in the range of an average high of 31.8°F (-0.1°C) and an average low of 20.1°F (-6.6°C).Temperature
The start of December signals a considerable reduction in the average high-temperature, receding from a chilly 46.4°F (8°C) in November to a subzero cold 31.8°F (-0.1°C). White Horse reports an average nighttime low-temperature of 20.1°F (-6.6°C) in December.Humidity
In White Horse, the average relative humidity in December is 76%.Rainfall
In White Horse, in December, during 3.7 rainfall days, 0.79" (20mm) of precipitation is typically accumulated. Throughout the year, there are 109.2 rainfall days, and 16.89" (429mm) of precipitation is accumulated.Snowfall
January through May, September through December are months with snowfall. The month with the most snowfall is December, when snow falls for 7.1 days and typically aggregates up to 2.76" (70mm) of snow.Daylight
The month with the shortest days is December, with an average of 9h and 0min of daylight.On the first day of the month, sunrise is at 7:55 am and sunset at 5:07 pm. On the last day of December, in White Horse, sunrise is at 8:14 am and sunset at 5:16 pm CST.
Sunshine
In December, the average sunshine in White Horse is 5.5h.UV index
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index in White Horse, South Dakota. A UV Index reading of 2, and below, represents a low threat to health from unprotected exposure to Sun's UV rays for the average person.Note: A typical high UV index of 2 in December suggests the following recommendations:
Most people face no serious problems with extended sun exposure, but those with fair skin, infants, and children always need protection. The Sun's radiation is especially intense around midday; try to stay in shade during this period. Outfit yourself in sun-safe attire, like long sleeves, pants, a hat, and UV-blocking sunglasses. Be watchful! The reflection of snow can enhance the intensity of the Sun's UV radiation nearly double.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
White Horse, SD
- Average high temperature in December: 31.8°F
The warmest month (with the highest average high temperature) is July (86.4°F).
The month with the lowest average high temperature is January (31.5°F).
- Average low temperature in December: 20.1°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 (18.5°F).
Average pressure in December
White Horse, SD
- Average pressure in December: 30.13"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.85"Hg).
Average wind speed in December
White Horse, SD
- Average wind speed in December: 11.9mph
The windiest month (with the highest average wind speed) is April (13.1mph).
The calmest months (with the lowest average wind speed) are July and August (10.6mph).
Average humidity in December
White Horse, SD
- Average humidity in December: 76%
The month with the highest relative humidity is January (78%).
The month with the lowest relative humidity is September (56%).
Average rainfall in December
White Horse, SD
- Average rainfall in December: 0.79"
The wettest month (with the highest rainfall) is May (2.6").
The driest month (with the least rainfall) is January (0.47").
Average rainfall days in December
White Horse, SD
- Average rainfall days in December: 3.7 days
The month with the highest number of rainy days is May (15.7 days).
The month with the least rainy days is January (2.4 days).
Average snowfall in December
White Horse, SD
- Average snowfall in December: 2.76"
The month with the highest snowfall is December (2.76").
The months with the least snowfall are June, July and August (0").
Average snowfall days in December
White Horse, SD
- Average snowfall days in December: 7.1 days
The month with the highest number of snowfall days is January (9.7 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in December /
Average sunshine in December
White Horse, 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 30min
The month with the most sunshine is July (Average sunshine: 11h and 12min).
The month with the least sunshine is January (Average sunshine: 5h and 24min).
Average sunshine days in December
White Horse, SD
- Average sunshine days in December: 20.4 days
The month with the most sunshine days is December (20.4 days).
The month with the least sunshine days is June (11.2 days).
Average UV index in December
White Horse, 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
White Horse, SD
- Average cloud cover in December: 41
The month with the most cloud cover is February (Cloud cover 44).
The months with the least cloud cover are July, August and September (Cloud cover 21).
Average visibility in December
White Horse, 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).
