December weather forecastLebanon, IL
December
Weather in December
The first month of the winter, December, is also a wintry month in Lebanon, Illinois, with an average temperature ranging between max 42.4°F (5.8°C) and min 30.2°F (-1°C).Temperature
A shift in Lebanon's weather is observed as November turns into December, with the average high temperature reducing from a fresh 53.2°F (11.8°C) to an icy 42.4°F (5.8°C). An average low-temperature of 30.2°F (-1°C) is noted during the nights in December.Humidity
In Lebanon, the average relative humidity in December is 77%.Rainfall
In December, the rain falls for 5.3 days. Throughout December, 0.63" (16mm) of precipitation is accumulated. Throughout the year, in Lebanon, there are 110.1 rainfall days, and 11.1" (282mm) of precipitation is accumulated.Snowfall
January through March, November and December are months with snowfall. In Lebanon, in December, snow falls for 2.9 days, with typically accumulated 0.2" (5mm) of snow. In Lebanon, during the entire year, snow falls for 13.8 days and aggregates up to 1.38" (35mm) of snow.Daylight
With an average of 9h and 30min of daylight, December has the shortest days of the year.On the first day of December, sunrise is at 6:58 am and sunset at 4:38 pm. On the last day of the month, sunrise is at 7:16 am and sunset at 4:48 pm CST.
Sunshine
In Lebanon, the average sunshine in December is 4.7h.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 estimate of 2, and below, represents a low threat to health from exposure to the Sun's UV radiation for average individuals.Note: In December, a regular UV index of 2 translates into these guidelines:
Apart from children, who require continuous protection, most can endure sun exposure for up to an hour without experiencing burns. The best time to avoid the Sun's harmful UV radiation is during midday when it's most potent. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days. Consider carefully! The reflective quality of snow can almost 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
Lebanon, IL
- Average high temperature in December: 42.4°F
The warmest month (with the highest average high temperature) is July (85.6°F).
The month with the lowest average high temperature is January (37.8°F).
- Average low temperature in December: 30.2°F
The month with the highest average low temperature is July (68°F).
The coldest month (with the lowest average low temperature) is January (24.8°F).
Average pressure in December
Lebanon, IL
- 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
Lebanon, IL
- Average wind speed in December: 8.8mph
The windiest month (with the highest average wind speed) is January (9.5mph).
The calmest month (with the lowest average wind speed) is July (5.6mph).
Average humidity in December
Lebanon, IL
- Average humidity in December: 77%
The months with the highest relative humidity are May, July and August (79%).
The month with the lowest relative humidity is October (70%).
Average rainfall in December
Lebanon, IL
- Average rainfall in December: 0.63"
The wettest month (with the highest rainfall) is May (1.5").
The driest month (with the least rainfall) is February (0.47").
Average rainfall days in December
Lebanon, IL
- Average rainfall days in December: 5.3 days
The month with the highest number of rainy days is July (13.2 days).
The month with the least rainy days is January (4.8 days).
Average snowfall in December
Lebanon, IL
- Average snowfall in December: 0.2"
The month with the highest snowfall is January (0.51").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in December
Lebanon, IL
- Average snowfall days in December: 2.9 days
The month with the highest number of snowfall days is January (4.7 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in December /
Average sunshine in December
Lebanon, IL
- Average daylight in December: 9h and 30min
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 42min
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 30min).
Average sunshine days in December
Lebanon, IL
- Average sunshine days in December: 22.9 days
The month with the most sunshine days is January (23.2 days).
The month with the least sunshine days is July (15.4 days).
Average UV index in December
Lebanon, IL
- 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, November and December (UV index 2).
Average cloud cover in December
Lebanon, IL
- Average cloud cover in December: 49
The month with the most cloud cover is January (Cloud cover 51).
The months with the least cloud cover are June and August (Cloud cover 28).
Average visibility in December
Lebanon, 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).
