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
Union Center's coldest month, December, registers temperatures that range from a high of 32.2°F (0.1°C) to a low of 18.9°F (-7.3°C).Humidity
The average relative humidity in December is 75%.Rainfall
In Union Center, during December, the rain falls for 5.8 days and regularly aggregates up to 0.75" (19mm) of precipitation. In Union Center, during the entire year, the rain falls for 126.3 days and collects up to 16.77" (426mm) of precipitation.Snowfall
January through May, September through December are months with snowfall. In December, in Union Center, it is snowing for 9.9 days. Throughout December, 4.06" (103mm) of snow is accumulated. In Union Center, during the entire year, snow falls for 62.1 days and aggregates up to 36.26" (921mm) of snow.Daylight
With an average of 8h and 54min of daylight, December has the shortest days of the year in Union Center.On the first day of December in Union Center, sunrise is at 7:07 am and sunset at 4:12 pm. On the last day of the month, sunrise is at 7:27 am and sunset at 4:20 pm MST.
Sunshine
The average sunshine in December is 6h.UV index
The months with the lowest UV index in Union Center are January, February, November and December, with an average maximum UV index of 2. A UV Index estimate of 2, and below, represents a low health risk from exposure to the Sun's UV rays for the ordinary person.Note: The UV index of 2 during December translates into the following guidance:
Babies, children, and those with sensitive skin should always avoid extended periods in the sun. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. Shield yourself from the harmful effects of UV radiation with sun-protective attire, a hat, and quality sunglasses. Take precaution! The reflection from snow can almost double the UV radiation of the Sun.
Frequently asked questions
What part of the year is the coldest in Union Center?
How cold is it in Union Center in December?
What is the average humidity in December in Union Center?
How much does it rain in Union Center in December?
How much does it snow in Union Center in December?
What is the month with the shortest days in Union Center?
What is the average length of the day in December in Union Center?
What time are sunrise and sunset in December in Union Center?
How many hours of sunshine does Union Center have in December?
What is the month with the lowest UV index in Union Center?
What is the UV index reading in December in Union Center?
Average temperature in December
Union Center, SD
- Average high temperature in December: 32.2°F
The warmest month (with the highest average high temperature) is July (84.7°F).
The month with the lowest average high temperature is December (32.2°F).
- Average low temperature in December: 18.9°F
The month with the highest average low temperature is July (62.4°F).
The coldest month (with the lowest average low temperature) is February (18°F).
Average pressure in December
Union Center, SD
- Average pressure in December: 30.13"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.84"Hg).
Average wind speed in December
Union Center, SD
- Average wind speed in December: 9.8mph
The windiest month (with the highest average wind speed) is October (10.4mph).
The calmest months (with the lowest average wind speed) are July and August (8.3mph).
Average humidity in December
Union Center, SD
- Average humidity in December: 75%
The month with the highest relative humidity is January (77%).
The months with the lowest relative humidity are August and September (49%).
Average rainfall in December
Union Center, SD
- Average rainfall in December: 0.75"
The wettest month (with the highest rainfall) is May (2.52").
The driest month (with the least rainfall) is January (0.59").
Average rainfall days in December
Union Center, SD
- Average rainfall days in December: 5.8 days
The month with the highest number of rainy days is May (17.3 days).
The month with the least rainy days is December (5.8 days).
Average snowfall in December
Union Center, SD
- Average snowfall in December: 4.06"
The month with the highest snowfall is April (8.23").
The months with the least snowfall are June, July and August (0").
Average snowfall days in December
Union Center, SD
- Average snowfall days in December: 9.9 days
The month with the highest number of snowfall days is February (12.8 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in December /
Average sunshine in December
Union Center, 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: 6h and 0min
The month with the most sunshine is August (Average sunshine: 11h and 42min).
The month with the least sunshine is February (Average sunshine: 5h and 54min).
Average sunshine days in December
Union Center, SD
- Average sunshine days in December: 17.8 days
The month with the most sunshine days is November (20 days).
The month with the least sunshine days is May (9.4 days).
Average UV index in December
Union Center, 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
Union Center, SD
- Average cloud cover in December: 36
The months with the most cloud cover are February and April (Cloud cover 39).
The month with the least cloud cover is August (Cloud cover 16).
Average visibility in December
Union Center, 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).
Union Center, South Dakota, USA
Weather forecast for your location
2. Allow the app to use your location
