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 goes from a moderate 56.5°F (13.6°C) in November to a frosty 47.3°F (8.5°C). December nights experience a consistent temperature drop to a wintry 32.2°F (0.1°C).Humidity
In December, the average relative humidity is 76%.Rainfall
In Sundown, in December, during 7.8 rainfall days, 1.93" (49mm) of precipitation is typically accumulated. In Sundown, Missouri, during the entire year, the rain falls for 136.4 days and collects up to 30.98" (787mm) of precipitation.Snowfall
January through March, November and December are months with snowfall. In Sundown, during December, snow falls for 1.9 days and regularly aggregates up to 1.1" (28mm) of snow. In Sundown, during the entire year, snow falls for 12.7 days and aggregates up to 5.35" (136mm) of snow.Daylight
The month with the shortest days is December, with an average of 9h and 42min of daylight.On the first day of December, sunrise is at 7:04 am and sunset at 4:55 pm. On the last day of the month, sunrise is at 7:22 am and sunset at 5:05 pm CST.
Sunshine
In Sundown, the average sunshine in December is 5.3h.UV index
The months with the lowest UV index are January, February 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 radiation for ordinary individuals.Note: In December, a daily UV index of 2 turns into the following recommendations:
Most people face no serious problems with extended sun exposure, but those with fair skin, infants, and children always need protection. Avoiding the Sun's peak radiation during midday hours is essential for health and safety. Employ a wide-brim hat for potent defense against up to 50% of UV rays. Notice this! Nearly double the intensity of the Sun's UV radiation can be caused by snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in December?
What is the average humidity in December?
How many days does it rain in December?
How many days does it snow in December?
What is the month with the shortest days?
How many hours of daylight does Sundown have in December?
What time are sunrise and sunset in December?
How many hours of sunshine does Sundown have in December?
What are the months with the lowest UV index?
How high is the UV index in December?
Average temperature in December
Sundown, MO
- Average high temperature in December: 47.3°F
The warmest month (with the highest average high temperature) is July (90.9°F).
The month with the lowest average high temperature is January (44.2°F).
- Average low temperature in December: 32.2°F
The month with the highest average low temperature is July (68.4°F).
The coldest month (with the lowest average low temperature) is January (28.2°F).
Average pressure in December
Sundown, MO
- Average pressure in December: 30.14"Hg
The month with the highest atmospheric pressure is January (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in December
Sundown, MO
- Average wind speed in December: 6.3mph
The windiest months (with the highest average wind speed) are January, February, March and April (7mph).
The calmest month (with the lowest average wind speed) is August (4.5mph).
Average humidity in December
Sundown, MO
- Average humidity in December: 76%
The month with the highest relative humidity is March (79%).
The months with the lowest relative humidity are July, August and October (73%).
Average rainfall in December
Sundown, MO
- Average rainfall in December: 1.93"
The wettest month (with the highest rainfall) is May (4.33").
The driest month (with the least rainfall) is September (1.73").
Average rainfall days in December
Sundown, MO
- Average rainfall days in December: 7.8 days
The month with the highest number of rainy days is May (15.9 days).
The month with the least rainy days is January (7.6 days).
Average snowfall in December
Sundown, MO
- Average snowfall in December: 1.1"
The month with the highest snowfall is February (1.77").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in December
Sundown, MO
- Average snowfall days in December: 1.9 days
The month with the highest number of snowfall days is January (4.4 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
Sundown, MO
- Average daylight in December: 9h and 4min
The month with the longest days is June (Average daylight: 14h and 36min).
The month with the shortest days is December (Average daylight: 9h and 42min).
- Average sunshine in December: 5h and 2min
The month with the most sunshine is June (Average sunshine: 10h and 30min).
The months with the least sunshine are January and February (Average sunshine: 5h and 6min).
Average sunshine days in December
Sundown, MO
- Average sunshine days in December: 20.4 days
The month with the most sunshine days is December (20.4 days).
The month with the least sunshine days is May (12.7 days).
Average UV index in December
Sundown, MO
- Average UV index in December: 2
The months with the highest UV index are May, June, July and August (UV index 6).
The months with the lowest UV index are January, February and December (UV index 2).
Average cloud cover in December
Sundown, MO
- Average cloud cover in December: 44
The month with the most cloud cover is March (Cloud cover 49).
The months with the least cloud cover are June and July (Cloud cover 30).
Average visibility in December
Sundown, MO
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, October, November and December (6mi).
The months with the lowest visibility are April, May, June, July, August and September (5mi).
Sundown, Missouri, USA
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