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
December's arrival brings a noticeable temperature shift, dropping from an icy 41.2°F (5.1°C) in November to a freezing cold 25.9°F (-3.4°C). December nights are marked by an average low-temperature of 14.4°F (-9.8°C).Humidity
The average relative humidity in December is 82%.Rainfall
In Keldron, in December, during 3.7 rainfall days, 0.55" (14mm) of precipitation is typically accumulated. In Keldron, during the entire year, the rain falls for 101.3 days and collects up to 14.25" (362mm) of precipitation.Snowfall
January through May, October through December are months with snowfall. In Keldron, in December, during 12.5 snowfall days, 2.52" (64mm) of snow is typically accumulated. Throughout the year, in Keldron, there are 65.8 snowfall days, and 21.42" (544mm) of snow is accumulated.Daylight
December has the shortest days of the year, with an average of 8h and 42min of daylight.On the first day of December, sunrise is at 7:09 am and sunset at 4:03 pm. On the last day of the month, sunrise is at 7:28 am and sunset at 4:12 pm MST.
Sunshine
In December, the average sunshine is 4.8h.UV index
With an average maximum UV index of 1, December is the month with the lowest UV index. A UV Index estimate of 2, and below, represents a low health risk from unprotected exposure to Sun's UV rays for the average person.Note: The maximum UV index of 1 during December leads to these instructions:
Those with sensitive skin, infants, and children require constant safeguarding from prolonged sun exposure. Midday is when the Sun's radiation is strongest; avoid prolonged exposure during this time. Protect your eyes, ears, face, and neck from the Sun by wearing a wide-brimmed hat. Keep in mind! Snow's reflective quality 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 Keldron in December?
What is the average humidity in December?
How many days does it rain in December?
How much does it snow in December?
What is the month with the shortest days?
What is the average length of the day in December?
When are sunrise and sunset in December?
How many hours of sunshine does Keldron have in December?
When is the lowest UV index?
How high is the UV index in December?
Average temperature in December
Keldron, SD
- Average high temperature in December: 25.9°F
The warmest month (with the highest average high temperature) is July (84.7°F).
The month with the lowest average high temperature is January (25.2°F).
- Average low temperature in December: 14.4°F
The month with the highest average low temperature is July (63.1°F).
The coldest month (with the lowest average low temperature) is January (11.7°F).
Average pressure in December
Keldron, SD
- Average pressure in December: 30.14"Hg
The month with the highest atmospheric pressure is February (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.84"Hg).
Average wind speed in December
Keldron, SD
- Average wind speed in December: 10.9mph
The windiest month (with the highest average wind speed) is April (11.7mph).
The calmest month (with the lowest average wind speed) is August (9.6mph).
Average humidity in December
Keldron, SD
- Average humidity in December: 82%
The month with the highest relative humidity is January (85%).
The months with the lowest relative humidity are August and September (51%).
Average rainfall in December
Keldron, SD
- Average rainfall in December: 0.55"
The wettest month (with the highest rainfall) is June (2.28").
The driest month (with the least rainfall) is January (0.47").
Average rainfall days in December
Keldron, SD
- Average rainfall days in December: 3.7 days
The month with the highest number of rainy days is June (15.1 days).
The month with the least rainy days is January (2.9 days).
Average snowfall in December
Keldron, SD
- Average snowfall in December: 2.52"
The month with the highest snowfall is February (4.53").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Keldron, SD
- Average snowfall days in December: 12.5 days
The month with the highest number of snowfall days is February (12.9 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Keldron, 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: 4h and 5min
The month with the most sunshine is August (Average sunshine: 11h and 30min).
The month with the least sunshine is January (Average sunshine: 4h and 36min).
Average sunshine days in December
Keldron, SD
- Average sunshine days in December: 16.9 days
The month with the most sunshine days is November (19.7 days).
The month with the least sunshine days is June (11.7 days).
Average UV index in December
Keldron, SD
- Average UV index in December: 1
The months with the highest UV index are June, July and August (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in December
Keldron, SD
- Average cloud cover in December: 51
The months with the most cloud cover are January and February (Cloud cover 52).
The months with the least cloud cover are July and August (Cloud cover 20).
Average visibility in December
Keldron, 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).
Keldron, South Dakota, USA
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