December weather forecastEllisville, IL
December
Weather in December
December, the first month of the winter in Ellisville, is still a cold month, with an average temperature varying between 26.4°F (-3.1°C) and 37°F (2.8°C).Temperature
December's arrival corresponds with a decrease in average high-temperatures, from November's chilly 49.1°F (9.5°C) to an icy 37°F (2.8°C). December in Ellisville, Illinois, is noted for a mean low-temperature of 26.4°F (-3.1°C).Humidity
The average relative humidity in December in Ellisville, Illinois, is 79%.Rainfall
December is the month with the least rainfall. Rain falls for 6.5 days and accumulates 0.94" (24mm) of precipitation.Snowfall
January through April, October through December are months with snowfall in Ellisville. In Ellisville, in December, during 5 snowfall days, 1.1" (28mm) of snow is typically accumulated. Throughout the year, in Ellisville, there are 27.4 snowfall days, and 9.21" (234mm) of snow is accumulated.Daylight
With an average of 9h and 18min of daylight, December has the shortest days of the year in Ellisville.On the first day of the month, sunrise is at 7:06 am and sunset at 4:34 pm. On the last day of December, sunrise is at 7:24 am and sunset at 4:44 pm CST.
Sunshine
In Ellisville, the average sunshine in December is 4.5h.UV index
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Ellisville, Illinois. A UV Index reading of 2, and below, represents a low threat to health from exposure to the Sun's UV radiation for the ordinary person.Note: In December, the maximum UV index of 2 suggests this advice:
Protection from prolonged sun exposure is necessary for babies, children, and individuals with sensitive skin. Given the potency of the midday Sun's UV radiation, one should avoid prolonged exposure. Sunglasses that guard against UVA and UVB rays are pivotal in minimizing sun-induced ocular damage. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Ellisville, IL
- Average high temperature in December: 37°F
The warmest month (with the highest average high temperature) is July (82.8°F).
The month with the lowest average high temperature is January (31.5°F).
- Average low temperature in December: 26.4°F
The month with the highest average low temperature is July (65.8°F).
The coldest month (with the lowest average low temperature) is January (19.4°F).
Average pressure in December
Ellisville, IL
- Average pressure in December: 30.11"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in December
Ellisville, IL
- Average wind speed in December: 9.8mph
The windiest month (with the highest average wind speed) is April (10.4mph).
The calmest months (with the lowest average wind speed) are July and August (6.5mph).
Average humidity in December
Ellisville, IL
- Average humidity in December: 79%
The month with the highest relative humidity is July (83%).
The month with the lowest relative humidity is October (71%).
Average rainfall in December
Ellisville, IL
- Average rainfall in December: 0.94"
The wettest month (with the highest rainfall) is May (3.23").
The driest month (with the least rainfall) is December (0.94").
Average rainfall days in December
Ellisville, IL
- Average rainfall days in December: 6.5 days
The month with the highest number of rainy days is May (16.7 days).
The month with the least rainy days is February (4.7 days).
Average snowfall in December
Ellisville, IL
- Average snowfall in December: 1.1"
The month with the highest snowfall is January (3.35").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Ellisville, IL
- Average snowfall days in December: 5 days
The month with the highest number of snowfall days is January (9.4 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
Ellisville, IL
- Average daylight in December: 9h and 18min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in December: 4h and 30min
The months with the most sunshine are June and July (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 4h and 6min).
Average sunshine days in December
Ellisville, IL
- 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 June (11.1 days).
Average UV index in December
Ellisville, IL
- 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
Ellisville, IL
- Average cloud cover in December: 52
The month with the most cloud cover is January (Cloud cover 56).
The month with the least cloud cover is September (Cloud cover 29).
Average visibility in December
Ellisville, IL
- 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).
