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
In December, the average high-temperature in Armour decreases considerably from a frosty 46.4°F (8°C) in November to a subzero cold 30.4°F (-0.9°C). During the month of December, the nighttime temperature in Armour falls to an average of 18.3°F (-7.6°C).Humidity
The average relative humidity in December in Armour is 81%.Rainfall
In Armour, in December, during 3.1 rainfall days, 0.59" (15mm) of precipitation is typically accumulated. Throughout the year, in Armour, South Dakota, there are 104.1 rainfall days, and 14.29" (363mm) of precipitation is accumulated.Snowfall
January through April, October through December are months with snowfall in Armour. In December, it is snowing for 6.5 days. Throughout December, 1.22" (31mm) of snow is accumulated. Throughout the year, in Armour, there are 32.8 snowfall days, and 8.35" (212mm) of snow is accumulated.Daylight
With an average of 9h and 0min of daylight, December has the shortest days of the year in Armour.On the first day of the month, sunrise is at 7:46 am and sunset at 4:58 pm. On the last day of December, sunrise is at 8:05 am and sunset at 5:07 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 estimate of 2, and below, represents a minimal health hazard from exposure to the Sun's UV rays for average individuals.Note: In December, an average UV index of 2 transforms into the following instructions:
While sun exposure does not greatly affect most, individuals with fair skin, babies, and children always need vigilant safeguarding. For health reasons, it's advisable to reduce direct sun exposure during peak hours around midday. Protect your eyes, ears, face, and neck from the Sun by wearing a wide-brimmed hat. Take warning! The intensity of the Sun's UV radiation can be nearly amplified twice due to snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is December in Armour?
What is the average humidity in December in Armour?
How many days does it rain in December in Armour?
How many days does it snow in December in Armour?
What is the month with the shortest days in Armour?
How many hours of daylight does Armour have in December?
What time are sunrise and sunset in December in Armour?
How many hours of sunshine does Armour have in December?
When is the lowest UV index in Armour?
How high is the UV index in December in Armour?
Average temperature in December
Armour, 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
Armour, 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
Armour, 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
Armour, 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
Armour, 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
Armour, 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
Armour, 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
Armour, 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
Armour, SD
- Average daylight in December: 9h and 0min
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 0min).
- Average sunshine in December: 4h and 5min
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
Armour, 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
Armour, 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
Armour, 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
Armour, 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).
Armour, South Dakota, USA
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