December weather forecastBonesteel, SD
December
Weather in December
December, the first month of the winter in Bonesteel, is still a freezing cold month, with an average temperature varying between 18.3°F (-7.6°C) and 30.4°F (-0.9°C).Temperature
Bonesteel, South Dakota, witnesses a significant decrease in the average high-temperature with the arrival of December, falling from November's frosty 46.4°F (8°C) to a subzero cold 30.4°F (-0.9°C). Throughout December, the average low-temperature records at 18.3°F (-7.6°C).Humidity
In December, the average relative humidity is 81%.Rainfall
In Bonesteel, in December, during 3.1 rainfall days, 0.59" (15mm) of precipitation is typically accumulated. Throughout the year, in Bonesteel, there are 104.1 rainfall days, and 14.29" (363mm) of precipitation is accumulated.Snowfall
Months with snowfall in Bonesteel are January through April, October through December. In Bonesteel, in December, during 6.5 snowfall days, 1.22" (31mm) of snow is typically accumulated. Throughout the year, there are 32.8 snowfall days, and 8.35" (212mm) of snow is accumulated.Daylight
December has the shortest days of the year, with an average of 9h and 6min of daylight.On the first day of December in Bonesteel, sunrise is at 7:48 am and sunset at 5:01 pm. On the last day of the month, sunrise is at 8:07 am and sunset at 5:11 pm CST.
Sunshine
The average sunshine in December is 4.9h.UV index
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index reading of 2, and below, represents a minimal health hazard from exposure to the Sun's UV radiation for the ordinary person.Note: A maximum daily UV index of 2 during December morphs into the following directions:
Children, babies, and those with sensitive skin should always be shielded from long periods of sun exposure. Direct Sun exposure should be minimized especially during midday when radiation is most intense. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses. Observe! Snow reflection can nearly intensify the Sun's UV radiation twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Bonesteel, SD
- Average high temperature in December: 30.4°F
The warmest month (with the highest average high temperature) is July (86.5°F).
The month with the lowest average high temperature is January (27.3°F).
- Average low temperature in December: 18.3°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 (13.6°F).
Average pressure in December
Bonesteel, SD
- Average pressure in December: 30.13"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.85"Hg).
Average wind speed in December
Bonesteel, SD
- Average wind speed in December: 10.3mph
The windiest month (with the highest average wind speed) is April (11.1mph).
The calmest month (with the lowest average wind speed) is July (8.3mph).
Average humidity in December
Bonesteel, SD
- Average humidity in December: 81%
The month with the highest relative humidity is January (84%).
The month with the lowest relative humidity is October (62%).
Average rainfall in December
Bonesteel, SD
- Average rainfall in December: 0.59"
The wettest month (with the highest rainfall) is May (2.72").
The driest month (with the least rainfall) is February (0.31").
Average rainfall days in December
Bonesteel, SD
- Average rainfall days in December: 3.1 days
The month with the highest number of rainy days is May (15.3 days).
The month with the least rainy days is January (2.9 days).
Average snowfall in December
Bonesteel, SD
- Average snowfall in December: 1.22"
The months with the highest snowfall are January and March (1.93").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Bonesteel, SD
- Average snowfall days in December: 6.5 days
The month with the highest number of snowfall days is January (8.2 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Bonesteel, SD
- Average daylight in December: 9h and 6min
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 6min).
- Average sunshine in December: 4h and 54min
The month with the most sunshine is July (Average sunshine: 11h and 6min).
The month with the least sunshine is January (Average sunshine: 4h and 42min).
Average sunshine days in December
Bonesteel, SD
- Average sunshine days in December: 22.5 days
The month with the most sunshine days is November (23.4 days).
The month with the least sunshine days is June (12.3 days).
Average UV index in December
Bonesteel, 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
Bonesteel, SD
- Average cloud cover in December: 46
The month with the most cloud cover is January (Cloud cover 49).
The month with the least cloud cover is July (Cloud cover 23).
Average visibility in December
Bonesteel, 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).
