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
With the onset of December, Williamsville experiences a modest temperature adjustment, with the average high-temperature receding from a fresh 55.2°F (12.9°C) in November to a chilly 46.2°F (7.9°C). Throughout December, an average nighttime temperature of 33.8°F (1°C) is experienced.Humidity
In December, the average relative humidity in Williamsville is 77%.Rainfall
In Williamsville, in December, during 10.8 rainfall days, 2.52" (64mm) of precipitation is typically accumulated. Throughout the year, in Williamsville, there are 156.7 rainfall days, and 37.44" (951mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through March, October through December. In Williamsville, in December, snow falls for 1.9 days, with typically accumulated 1.14" (29mm) of snow. In Williamsville, Missouri, during the entire year, snow falls for 10.7 days and aggregates up to 5.08" (129mm) of snow.Daylight
With an average of 9h and 42min of daylight, December has the shortest days of the year.On the first day of the month, sunrise is at 6:57 am and sunset at 4:45 pm. On the last day of December, sunrise is at 7:15 am and sunset at 4:55 pm CST.
Sunshine
In Williamsville, the average sunshine in December is 5.1h.UV index
January and December, with an average maximum UV index of 2, are months with the lowest UV index in Williamsville, Missouri. A UV Index reading of 2, and below, represents a low health risk from unsafe exposure to UV radiation for average individuals.Note: In December, the maximum UV index of 2 translates into these guidelines:
Prolonged sun exposure should always be prevented in babies, children, and those with sensitive skin. UV radiation from the Sun is most dangerous during midday; take precautions and seek shade. A hat with a broad brim is indispensable, filtering out up to half of UV rays. Take into account! The reflection from snow can nearly double the Sun's UV radiation intensity.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in December in Williamsville?
What is the average humidity in December in Williamsville?
How much does it rain in Williamsville in December?
How much does it snow in Williamsville in December?
What is the month with the shortest days in Williamsville?
What is the average length of the day in December in Williamsville?
When is the sunrise / sunset in December in Williamsville?
How long on average sun shines in December in Williamsville?
What is the month with the lowest UV index in Williamsville?
How high is the UV index in December in Williamsville?
Average temperature in December
Williamsville, MO
- Average high temperature in December: 46.2°F
The warmest month (with the highest average high temperature) is July (88.5°F).
The month with the lowest average high temperature is January (42.1°F).
- Average low temperature in December: 33.8°F
The month with the highest average low temperature is July (70°F).
The coldest month (with the lowest average low temperature) is January (28°F).
Average pressure in December
Williamsville, MO
- Average pressure in December: 30.14"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in December
Williamsville, MO
- Average wind speed in December: 8mph
The windiest month (with the highest average wind speed) is February (8.7mph).
The calmest month (with the lowest average wind speed) is August (5.3mph).
Average humidity in December
Williamsville, MO
- Average humidity in December: 77%
The month with the highest relative humidity is May (79%).
The month with the lowest relative humidity is October (70%).
Average rainfall in December
Williamsville, MO
- Average rainfall in December: 2.52"
The wettest month (with the highest rainfall) is April (4.8").
The driest month (with the least rainfall) is September (1.77").
Average rainfall days in December
Williamsville, MO
- Average rainfall days in December: 10.8 days
The month with the highest number of rainy days is July (16.5 days).
The month with the least rainy days is January (9.6 days).
Average snowfall in December
Williamsville, MO
- Average snowfall in December: 1.14"
The month with the highest snowfall is February (1.69").
The months with the least snowfall are April, May, June, July, August and September (0").
Average snowfall days in December
Williamsville, MO
- Average snowfall days in December: 1.9 days
The month with the highest number of snowfall days is February (3.3 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
Williamsville, MO
- Average daylight in December: 9h and 4min
The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 42min).
- Average sunshine in December: 5h and 1min
The month with the most sunshine is June (Average sunshine: 10h and 42min).
The month with the least sunshine is February (Average sunshine: 4h and 48min).
Average sunshine days in December
Williamsville, MO
- Average sunshine days in December: 18.4 days
The month with the most sunshine days is October (19.3 days).
The month with the least sunshine days is July (12.3 days).
Average UV index in December
Williamsville, 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 and December (UV index 2).
Average cloud cover in December
Williamsville, MO
- Average cloud cover in December: 45
The months with the most cloud cover are February and March (Cloud cover 47).
The month with the least cloud cover is June (Cloud cover 26).
Average visibility in December
Williamsville, 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).
Williamsville, Missouri, USA
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