January weather forecastWhite Rock, SD
January
Weather in January
January, the same as December, in White Rock, South Dakota, is a freezing cold winter month, with temperature in the range of an average high of 18.7°F (-7.4°C) and an average low of 4.8°F (-15.1°C).Temperature
White Rock's January weather reaches an average high of 18.7°F (-7.4°C) and an average low of 4.8°F (-15.1°C), making it the coldest month.Humidity
The most humid month in White Rock, South Dakota, is January, with an average relative humidity of 89%.Rainfall
In White Rock, during January, the rain falls for 2.7 days and regularly aggregates up to 0.59" (15mm) of precipitation. Throughout the year, there are 102 rainfall days, and 19.17" (487mm) of precipitation is accumulated.Snowfall
January through May, October through December are months with snowfall. In White Rock, in January, snow falls for 12.3 days, with typically accumulated 3.62" (92mm) of snow. Throughout the year, there are 54.3 snowfall days, and 19.17" (487mm) of snow is accumulated.Daylight
In January, the average length of the day is 9h and 8min.On the first day of January in White Rock, sunrise is at 8:07 am and sunset at 4:51 pm. On the last day of the month, sunrise is at 7:49 am and sunset at 5:29 pm CST.
Sunshine
January has the least sunshine of the year in White Rock, with an average of 3.4h of sunshine.UV index
January and December, with an average maximum UV index of 1, are months with the lowest UV index in White Rock. A UV Index estimate of 2, and below, represents a minimal health vulnerability from unsafe exposure to UV radiation for average individuals.Note: The daily high UV index of 1 during January translates into the following recommendations:
Apart from children, who require continuous protection, most can endure sun exposure for up to an hour without experiencing burns. To guard against the harmful effects of the Sun, minimize exposure during midday. Stay sun-safe with clothing that is both closely woven and worn loosely. Be aware! The reflective nature of snow can magnify the Sun's UV radiation almost twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in January
White Rock, SD
- Average high temperature in January: 18.7°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 January: 4.8°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 January
White Rock, SD
- Average pressure in January: 30.16"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 January
White Rock, SD
- Average wind speed in January: 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 January
White Rock, SD
- Average humidity in January: 89%
The month with the highest relative humidity is January (89%).
The month with the lowest relative humidity is September (65%).
Average rainfall in January
White Rock, SD
- Average rainfall in January: 0.59"
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 January
White Rock, SD
- Average rainfall days in January: 2.7 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 January
White Rock, SD
- Average snowfall in January: 3.62"
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 January
White Rock, SD
- Average snowfall days in January: 12.3 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 January /
Average sunshine in January
White Rock, SD
- Average daylight in January: 9h and 6min
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 January: 3h and 24min
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 January
White Rock, SD
- Average sunshine days in January: 16.7 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 January
White Rock, SD
- Average UV index in January: 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 January
White Rock, SD
- Average cloud cover in January: 63
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 January
White Rock, SD
- Average visibility in January: 5mi
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).
