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 shift from November to December brings a noticeable decrease in the average high-temperature, dropping from a wintry 41.9°F (5.5°C) to a subzero cold 25.5°F (-3.6°C). Roscoe's average low-temperature in December is measured at 14.2°F (-9.9°C).Humidity
In December, the average relative humidity in Roscoe is 84%.Rainfall
In Roscoe, in December, it is raining for 3.3 days, with typically 0.75" (19mm) of accumulated precipitation. In Roscoe, during the entire year, the rain falls for 97.8 days and collects up to 16.65" (423mm) of precipitation.Snowfall
January through May, October through December are months with snowfall. In December, it is snowing for 11.2 days. Throughout December, 2.91" (74mm) of snow is accumulated. Throughout the year, in Roscoe, there are 59.7 snowfall days, and 19.96" (507mm) of snow is accumulated.Daylight
With an average of 8h and 48min of daylight, December has the shortest days of the year.On the first day of the month, sunrise is at 7:57 am and sunset at 4:55 pm. On the last day of December, sunrise is at 8:17 am and sunset at 5:04 pm CST.
Sunshine
The average sunshine in December is 4.4h.UV index
January, February, November and December, with an average maximum UV index of 1, are months with the lowest UV index. A UV Index reading of 2, and below, represents a low health risk from exposure to the Sun's UV rays for the average person.Note: The maximum daily UV index of 1 in December converts into the following recommendations:
While many people can endure lengthy sun exposure, it remains imperative to safeguard babies, children, and fair-skinned individuals. Sun's radiation is most powerful around mid-day, so it's best to limit outdoor activities during this time. A wide-brimmed hat provides unparalleled sun protection for sensitive areas like the eyes, ears, and neck. Be alert! Nearly double the UV rays from the Sun can be reflected by snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is December in Roscoe?
What is the average humidity in December in Roscoe?
How many days does it rain in December in Roscoe?
How many days does it snow in December in Roscoe?
What is the month with the shortest days in Roscoe?
How many hours of daylight does Roscoe have in December?
What time are sunrise and sunset in December in Roscoe?
How many hours of sunshine does Roscoe have in December?
What are the months with the lowest UV index in Roscoe?
What is the UV index reading in December in Roscoe?
Average temperature in December
Roscoe, SD
- Average high temperature in December: 25.5°F
The warmest month (with the highest average high temperature) is July (85.8°F).
The month with the lowest average high temperature is January (22.6°F).
- Average low temperature in December: 14.2°F
The month with the highest average low temperature is July (64.9°F).
The coldest month (with the lowest average low temperature) is January (9.1°F).
Average pressure in December
Roscoe, SD
- Average pressure in December: 30.14"Hg
The months with the highest atmospheric pressure are January and February (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.84"Hg).
Average wind speed in December
Roscoe, SD
- Average wind speed in December: 10.4mph
The windiest month (with the highest average wind speed) is April (11.8mph).
The calmest month (with the lowest average wind speed) is August (9.7mph).
Average humidity in December
Roscoe, SD
- Average humidity in December: 84%
The month with the highest relative humidity is January (88%).
The months with the lowest relative humidity are August and September (56%).
Average rainfall in December
Roscoe, SD
- Average rainfall in December: 0.75"
The wettest month (with the highest rainfall) is June (2.8").
The driest month (with the least rainfall) is January (0.55").
Average rainfall days in December
Roscoe, SD
- Average rainfall days in December: 3.3 days
The month with the highest number of rainy days is June (14.4 days).
The month with the least rainy days is February (1.9 days).
Average snowfall in December
Roscoe, SD
- Average snowfall in December: 2.91"
The month with the highest snowfall is February (5.04").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Roscoe, SD
- Average snowfall days in December: 11.2 days
The month with the highest number of snowfall days is January (12.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Roscoe, SD
- Average daylight in December: 8h and 5min
The month with the longest days is June (Average daylight: 15h and 36min).
The month with the shortest days is December (Average daylight: 8h and 48min).
- Average sunshine in December: 4h and 2min
The month with the most sunshine is July (Average sunshine: 11h and 12min).
The month with the least sunshine is January (Average sunshine: 3h and 54min).
Average sunshine days in December
Roscoe, SD
- Average sunshine days in December: 17.8 days
The month with the most sunshine days is November (21.1 days).
The month with the least sunshine days is June (13.1 days).
Average UV index in December
Roscoe, SD
- Average UV index in December: 1
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 1).
Average cloud cover in December
Roscoe, SD
- Average cloud cover in December: 53
The month with the most cloud cover is January (Cloud cover 58).
The months with the least cloud cover are July and August (Cloud cover 22).
Average visibility in December
Roscoe, 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).
Roscoe, South Dakota, USA
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