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 is marked by a decrease in temperature, transitioning from a fresh 50.9°F (10.5°C) in November to a wintry 39.2°F (4°C). The nighttime temperature, during December, averages of 26.8°F (-2.9°C).Humidity
In Shelbyville, the average relative humidity in December is 77%.Rainfall
In Shelbyville, in December, it is raining for 6.2 days, with typically 1.46" (37mm) of accumulated precipitation. Throughout the year, there are 133.9 rainfall days, and 26.69" (678mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through April, October through December. In Shelbyville, in December, during 4.5 snowfall days, 1.46" (37mm) of snow is typically accumulated. In Shelbyville, during the entire year, snow falls for 22.1 days and aggregates up to 10.63" (270mm) of snow.Daylight
December has the shortest days of the year, with an average of 9h and 24min of daylight.On the first day of December, sunrise is at 7:10 am and sunset at 4:44 pm. On the last day of the month, sunrise is at 7:29 am and sunset at 4:53 pm CST.
Sunshine
In Shelbyville, 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 reading of 2, and below, represents a minimal health hazard from exposure to the Sun's UV rays for ordinary individuals.Note: In December, a regular UV index of 2 translates into these guidelines:
Many can withstand an hour in the sun without burning, yet children must always have protection against sunlight. Solar radiation peaks around mid-day, so it's wise to limit exposure to the Sun at this time. Prioritize a wide-brim hat for comprehensive sun defense for your face, neck, eyes, and ears. 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
Is December cold?
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?
What is the average length of the day in December?
When is the sunrise / sunset in December?
How many hours of sunshine does Shelbyville have in December?
When is the lowest UV index?
How high is the UV index in December?
Average temperature in December
Shelbyville, MO
- Average high temperature in December: 39.2°F
The warmest month (with the highest average high temperature) is July (84.6°F).
The month with the lowest average high temperature is January (33.8°F).
- Average low temperature in December: 26.8°F
The month with the highest average low temperature is July (66.9°F).
The coldest month (with the lowest average low temperature) is January (21.2°F).
Average pressure in December
Shelbyville, MO
- Average pressure in December: 30.12"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in December
Shelbyville, MO
- Average wind speed in December: 9.8mph
The windiest months (with the highest average wind speed) are January and February (10.3mph).
The calmest months (with the lowest average wind speed) are July and August (6.5mph).
Average humidity in December
Shelbyville, MO
- Average humidity in December: 77%
The months with the highest relative humidity are May, June and July (80%).
The month with the lowest relative humidity is October (71%).
Average rainfall in December
Shelbyville, MO
- Average rainfall in December: 1.46"
The wettest month (with the highest rainfall) is May (3.46").
The driest month (with the least rainfall) is January (1.18").
Average rainfall days in December
Shelbyville, MO
- Average rainfall days in December: 6.2 days
The month with the highest number of rainy days is May (17.2 days).
The month with the least rainy days is January (5.3 days).
Average snowfall in December
Shelbyville, MO
- Average snowfall in December: 1.46"
The month with the highest snowfall is January (3.62").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Shelbyville, MO
- Average snowfall days in December: 4.5 days
The month with the highest number of snowfall days is January (6.7 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
Shelbyville, MO
- Average daylight in December: 9h and 2min
The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in December: 4h and 5min
The month with the most sunshine is July (Average sunshine: 10h and 30min).
The month with the least sunshine is January (Average sunshine: 4h and 30min).
Average sunshine days in December
Shelbyville, MO
- Average sunshine days in December: 19.8 days
The month with the most sunshine days is January (20 days).
The month with the least sunshine days is May (12.1 days).
Average UV index in December
Shelbyville, MO
- 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
Shelbyville, MO
- Average cloud cover in December: 47
The month with the most cloud cover is January (Cloud cover 51).
The months with the least cloud cover are July and August (Cloud cover 28).
Average visibility in December
Shelbyville, MO
- 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).
Shelbyville, Missouri, USA
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