December weather forecastWheaton, MO
December
Weather in December
The first month of the winter, December, is also a frosty month in Wheaton, Missouri, with temperature in the range of an average low of 31.1°F (-0.5°C) and an average high of 45.5°F (7.5°C).Temperature
In December, the meteorological conditions alter, with the average high-temperature shifting from a refreshing 55.6°F (13.1°C) in November to a chilly 45.5°F (7.5°C). December nights observe an average temperature dip to a freezing cold 31.1°F (-0.5°C).Humidity
In December, the average relative humidity is 75%.Rainfall
In Wheaton, in December, it is raining for 8.1 days, with typically 1.77" (45mm) of accumulated precipitation. Throughout the year, there are 152.1 rainfall days, and 34.45" (875mm) of precipitation is accumulated.Snowfall
January through May, November and December are months with snowfall. In Wheaton, Missouri, in December, during 3.2 snowfall days, 1.14" (29mm) of snow is typically accumulated. In Wheaton, during the entire year, snow falls for 16.6 days and aggregates up to 7.2" (183mm) 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 the month, sunrise is at 7:10 am and sunset at 5:00 pm. On the last day of December, sunrise is at 7:28 am and sunset at 5:10 pm CST.
Sunshine
In December, the average sunshine is 5.4h.UV index
The months with the lowest UV index are January and December, with an average maximum UV index of 2. A UV Index estimate of 2, and below, represents a minimal health vulnerability from exposure to the Sun's UV radiation for average individuals.Note: The maximum daily UV index of 2 in December converts into the following recommendations:
Apart from children, who require continuous protection, most can endure sun exposure for up to an hour without experiencing burns. When the Sun's UV radiation is most intense during midday, it's best to find shade and limit exposure. In bright sunlight, prioritize sunglasses that grant protection from UVA and UVB radiation. Note well! The intensity of the Sun's UV rays can be nearly doubled by snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Wheaton, MO
- Average high temperature in December: 45.5°F
The warmest month (with the highest average high temperature) is July (88.9°F).
The month with the lowest average high temperature is January (42.4°F).
- Average low temperature in December: 31.1°F
The month with the highest average low temperature is July (68.9°F).
The coldest month (with the lowest average low temperature) is January (27°F).
Average pressure in December
Wheaton, 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
Wheaton, MO
- Average wind speed in December: 9mph
The windiest months (with the highest average wind speed) are March and April (10.3mph).
The calmest month (with the lowest average wind speed) is July (6.6mph).
Average humidity in December
Wheaton, MO
- Average humidity in December: 75%
The month with the highest relative humidity is May (78%).
The months with the lowest relative humidity are January, July, August and October (73%).
Average rainfall in December
Wheaton, MO
- Average rainfall in December: 1.77"
The wettest month (with the highest rainfall) is May (5").
The driest month (with the least rainfall) is February (1.65").
Average rainfall days in December
Wheaton, MO
- Average rainfall days in December: 8.1 days
The month with the highest number of rainy days is May (17.2 days).
The month with the least rainy days is January (7.4 days).
Average snowfall in December
Wheaton, MO
- Average snowfall in December: 1.14"
The months with the highest snowfall are January and February (2.17").
The months with the least snowfall are June, July, August, September and October (0").
Average snowfall days in December
Wheaton, MO
- Average snowfall days in December: 3.2 days
The month with the highest number of snowfall days is February (5.2 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Wheaton, MO
- Average daylight in December: 9h and 42min
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 24min
The months with the most sunshine are June and July (Average sunshine: 10h and 36min).
The month with the least sunshine is January (Average sunshine: 5h and 18min).
Average sunshine days in December
Wheaton, MO
- Average sunshine days in December: 20.5 days
The month with the most sunshine days is December (20.5 days).
The month with the least sunshine days is July (11.4 days).
Average UV index in December
Wheaton, 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
Wheaton, MO
- Average cloud cover in December: 42
The month with the most cloud cover is March (Cloud cover 47).
The month with the least cloud cover is August (Cloud cover 26).
Average visibility in December
Wheaton, 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).
