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
December shows a mild decline in the average high-temperature, falling from November's cool 53.8°F (12.1°C) to a chilly 43.3°F (6.3°C). Robertsville records a consistent low-temperature of 30°F (-1.1°C) during December nights.Humidity
The average relative humidity in December is 76%.Rainfall
In December, the rain falls for 6.9 days. Throughout December, 1.69" (43mm) of precipitation is accumulated. In Robertsville, during the entire year, the rain falls for 138.9 days and collects up to 28.54" (725mm) of precipitation.Snowfall
January through March, November and December are months with snowfall. In Robertsville, Missouri, during December, snow falls for 3.5 days and regularly aggregates up to 1.38" (35mm) of snow. Throughout the year, there are 16.3 snowfall days, and 5.08" (129mm) of snow is accumulated.Daylight
With an average of 9h and 30min of daylight, December has the shortest days of the year in Robertsville.On the first day of the month, sunrise is at 7:02 am and sunset at 4:42 pm. On the last day of December, in Robertsville, sunrise is at 7:20 am and sunset at 4:52 pm CST.
Sunshine
In Robertsville, the average sunshine in December is 4.9h.UV index
The months with the lowest UV index in Robertsville, Missouri, are January, February and December, with an average maximum UV index of 2. A UV Index value of 2, and less, symbolizes a low health risk from exposure to the Sun's UV radiation for average individuals.Note: A maximum high daily UV index of 2 during December translates into the following directions:
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. To best shield against UV radiation, choose sun-safe garments and dependable sunglasses. Heads up! The UV radiation from the Sun can almost be doubled by snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is December in Robertsville?
What is the average humidity in December in Robertsville?
How much does it rain in Robertsville in December?
How many days does it snow in December in Robertsville?
What is the month with the shortest days in Robertsville?
What is the average length of the day in December in Robertsville?
When are sunrise and sunset in December in Robertsville?
How long on average sun shines in December in Robertsville?
When is the lowest UV index in Robertsville?
How high is the UV index in December in Robertsville?
Average temperature in December
Robertsville, MO
- Average high temperature in December: 43.3°F
The warmest month (with the highest average high temperature) is July (88.2°F).
The month with the lowest average high temperature is January (38.5°F).
- Average low temperature in December: 30°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 (24.4°F).
Average pressure in December
Robertsville, MO
- 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 (29.92"Hg).
Average wind speed in December
Robertsville, MO
- Average wind speed in December: 8mph
The windiest month (with the highest average wind speed) is January (8.6mph).
The calmest months (with the lowest average wind speed) are July and August (5.3mph).
Average humidity in December
Robertsville, MO
- Average humidity in December: 76%
The month with the highest relative humidity is May (78%).
The month with the lowest relative humidity is October (72%).
Average rainfall in December
Robertsville, MO
- Average rainfall in December: 1.69"
The wettest month (with the highest rainfall) is May (3.5").
The driest month (with the least rainfall) is February (1.42").
Average rainfall days in December
Robertsville, MO
- Average rainfall days in December: 6.9 days
The month with the highest number of rainy days is May (16.8 days).
The month with the least rainy days is January (6.6 days).
Average snowfall in December
Robertsville, MO
- Average snowfall in December: 1.38"
The month with the highest snowfall is February (1.46").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in December
Robertsville, MO
- Average snowfall days in December: 3.5 days
The month with the highest number of snowfall days is January (5.4 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
Robertsville, MO
- Average daylight in December: 9h and 3min
The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in December: 4h and 5min
The months with the most sunshine are June and July (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 4h and 42min).
Average sunshine days in December
Robertsville, MO
- Average sunshine days in December: 20.7 days
The month with the most sunshine days is December (20.7 days).
The month with the least sunshine days is May (12.5 days).
Average UV index in December
Robertsville, 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
Robertsville, MO
- Average cloud cover in December: 48
The month with the most cloud cover is January (Cloud cover 50).
The months with the least cloud cover are June, July and August (Cloud cover 29).
Average visibility in December
Robertsville, 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).
Robertsville, Missouri, USA
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