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
The onset of December marks a clear decrease in the average high-temperature, dropping from a chilly 44.2°F (6.8°C) in November to a freezing cold 28.2°F (-2.1°C). December nights in Fort Pierre cool down to an average low-temperature of 16.3°F (-8.7°C).Humidity
In Fort Pierre, South Dakota, the average relative humidity in December is 82%.Rainfall
In December, the rain falls for 2.9 days. Throughout December, 0.67" (17mm) of precipitation is accumulated. Throughout the year, there are 98.5 rainfall days, and 13.7" (348mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through May, October through December. In Fort Pierre, in December, snow falls for 8.2 days, with typically accumulated 2.48" (63mm) of snow. Throughout the year, there are 41.4 snowfall days, and 13.07" (332mm) of snow is accumulated.Daylight
With an average of 8h and 54min of daylight, December has the shortest days of the year.On the first day of December, sunrise is at 6:58 am and sunset at 4:03 pm. On the last day of the month, sunrise is at 7:17 am and sunset at 4:12 pm MST.
Sunshine
The average sunshine in December is 4.9h.UV index
February and December, with an average maximum UV index of 1, are months with the lowest UV index in Fort Pierre. A UV Index reading of 2, and below, represents a low health risk from exposure to the Sun's UV radiation for the average person.Note: In December, the maximum UV index of 1 suggests this advice:
Babies, children, and individuals with sensitive skin should always have protection against extended sun exposure. Direct exposure to the Sun during its peak hours around mid-day should be minimized for safety. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes. Mind you! Snow reflection can increase the intensity of the Sun's UV radiation nearly twofold.
Frequently asked questions
How cold is December in Fort Pierre?
What is the average humidity in December in Fort Pierre?
How much does it rain in Fort Pierre in December?
How many days does it snow in December in Fort Pierre?
What is the month with the shortest days in Fort Pierre?
How many hours of daylight does Fort Pierre have in December?
When is the sunrise / sunset in December in Fort Pierre?
How many hours of sunshine does Fort Pierre have in December?
When is the lowest UV index in Fort Pierre?
What is the UV index intensity in December in Fort Pierre?
Average temperature in December
Fort Pierre, SD
- Average high temperature in December: 28.2°F
The warmest month (with the highest average high temperature) is July (88.7°F).
The month with the lowest average high temperature is January (26.2°F).
- Average low temperature in December: 16.3°F
The month with the highest average low temperature is July (67.5°F).
The coldest month (with the lowest average low temperature) is January (12.6°F).
Average pressure in December
Fort Pierre, SD
- Average pressure in December: 30.14"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.84"Hg).
Average wind speed in December
Fort Pierre, SD
- Average wind speed in December: 10mph
The windiest month (with the highest average wind speed) is April (11.9mph).
The calmest months (with the lowest average wind speed) are February and August (9.9mph).
Average humidity in December
Fort Pierre, 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 (52%).
Average rainfall in December
Fort Pierre, SD
- Average rainfall in December: 0.67"
The wettest month (with the highest rainfall) is May (2.24").
The driest month (with the least rainfall) is January (0.35").
Average rainfall days in December
Fort Pierre, SD
- Average rainfall days in December: 2.9 days
The month with the highest number of rainy days is June (14.2 days).
The month with the least rainy days is February (2.4 days).
Average snowfall in December
Fort Pierre, SD
- Average snowfall in December: 2.48"
The month with the highest snowfall is February (3.66").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Fort Pierre, SD
- Average snowfall days in December: 8.2 days
The month with the highest number of snowfall days is February (10 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Fort Pierre, 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: 4h and 5min
The month with the most sunshine is July (Average sunshine: 11h and 30min).
The month with the least sunshine is January (Average sunshine: 4h and 36min).
Average sunshine days in December
Fort Pierre, SD
- Average sunshine days in December: 20.9 days
The month with the most sunshine days is November (22.3 days).
The month with the least sunshine days is June (13.7 days).
Average UV index in December
Fort Pierre, SD
- Average UV index in December: 1
The month with the highest UV index is July (UV index 7).
The months with the lowest UV index are February and December (UV index 1).
Average cloud cover in December
Fort Pierre, SD
- Average cloud cover in December: 46
The month with the most cloud cover is January (Cloud cover 50).
The months with the least cloud cover are July and August (Cloud cover 19).
Average visibility in December
Fort Pierre, 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).
Fort Pierre, South Dakota, USA
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