December weather forecastInverness, IL
December
Weather in December
The first month of the winter, December, is also an icy month in Inverness, Illinois, with temperature in the range of an average low of 24.6°F (-4.1°C) and an average high of 34.3°F (1.3°C).Temperature
The arrival of December signals a shift in temperature, down from a chilly 45.5°F (7.5°C) in November to a cold 34.3°F (1.3°C). Inverness experiences an average temperature drop to a subzero cold 24.6°F (-4.1°C) during December nights.Humidity
In Inverness, the average relative humidity in December is 81%.Rainfall
December is the month with the least rainfall in Inverness. Rain falls for 4.6 days and accumulates 0.59" (15mm) of precipitation.Snowfall
January through May, October through December are months with snowfall in Inverness. In Inverness, Illinois, in December, snow falls for 7.5 days, with typically accumulated 0.98" (25mm) of snow. Throughout the year, there are 37.9 snowfall days, and 6.89" (175mm) of snow is accumulated.Daylight
The month with the shortest days in Inverness, Illinois, is December, with an average of 9h and 12min of daylight.On the first day of December, sunrise is at 7:01 am and sunset at 4:21 pm. On the last day of the month, sunrise is at 7:20 am and sunset at 4:30 pm CST.
Sunshine
In December, the average sunshine is 4h.UV index
January and December, with an average maximum UV index of 1, are months with the lowest UV index in Inverness. 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: A typical high UV index of 1 in December suggests the following recommendations:
The majority are not significantly affected by prolonged sun exposure. Infants, children, and those with fair skin must always have protection. Around midday, solar radiation is most harmful; hence, exposure should be limited. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Take heed! The reflection of snow can intensify the Sun's UV radiation nearly double.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Inverness, IL
- Average high temperature in December: 34.3°F
The warmest month (with the highest average high temperature) is July (81.5°F).
The month with the lowest average high temperature is January (27.9°F).
- Average low temperature in December: 24.6°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 (16.9°F).
Average pressure in December
Inverness, IL
- Average pressure in December: 30.09"Hg
The month with the highest atmospheric pressure is January (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in December
Inverness, IL
- Average wind speed in December: 9.3mph
The windiest month (with the highest average wind speed) is January (9.9mph).
The calmest month (with the lowest average wind speed) is August (6.3mph).
Average humidity in December
Inverness, IL
- Average humidity in December: 81%
The months with the highest relative humidity are January and February (83%).
The month with the lowest relative humidity is October (73%).
Average rainfall in December
Inverness, IL
- Average rainfall in December: 0.59"
The wettest month (with the highest rainfall) is May (1.77").
The driest month (with the least rainfall) is December (0.59").
Average rainfall days in December
Inverness, IL
- Average rainfall days in December: 4.6 days
The month with the highest number of rainy days is July (15.7 days).
The month with the least rainy days is February (3.8 days).
Average snowfall in December
Inverness, IL
- Average snowfall in December: 0.98"
The month with the highest snowfall is February (1.81").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Inverness, IL
- Average snowfall days in December: 7.5 days
The month with the highest number of snowfall days is January (11.1 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Inverness, IL
- Average daylight in December: 9h and 12min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in December: 4h and 0min
The months with the most sunshine are July and August (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days in December
Inverness, IL
- Average sunshine days in December: 20.1 days
The month with the most sunshine days is November (20.2 days).
The month with the least sunshine days is July (12.1 days).
Average UV index in December
Inverness, IL
- Average UV index in December: 1
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in December
Inverness, IL
- Average cloud cover in December: 59
The month with the most cloud cover is January (Cloud cover 61).
The months with the least cloud cover are July, August and September (Cloud cover 31).
Average visibility in December
Inverness, 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).
