December weather forecastGurnee, IL
December
Weather in December
The first month of the winter, December, is still a cold month in Gurnee, Illinois, with an average temperature varying between 34°F (1.1°C) and 25.3°F (-3.7°C).Temperature
In the transition to December, Gurnee observes a drop in the average high-temperature, moving from a chilly 45.1°F (7.3°C) in November to a cold 34°F (1.1°C). Gurnee's nocturnal average in December closely mirrors its daytime temperatures, settling at a freezing cold 25.3°F (-3.7°C).Humidity
In Gurnee, the average relative humidity in December is 81%.Rainfall
December is the month with the least rainfall. Rain falls for 8.1 days and accumulates 0.91" (23mm) of precipitation.Snowfall
January through April, October through December are months with snowfall. In Gurnee, in December, during 9.7 snowfall days, 1.77" (45mm) of snow is typically accumulated. Throughout the year, there are 45.5 snowfall days, and 9.37" (238mm) of snow is accumulated.Daylight
The month with the shortest days is December, with an average of 9h and 6min of daylight.On the first day of the month, sunrise is at 7:01 am and sunset at 4:19 pm. On the last day of December, sunrise is at 7:20 am and sunset at 4:29 pm CST.
Sunshine
In Gurnee, the average sunshine in December is 4h.UV index
The months with the lowest UV index in Gurnee are January and December, with an average maximum UV index of 1. A UV Index value of 2, and less, symbolizes a minimal health hazard from unsafe exposure to UV radiation for average individuals.Note: In December, the maximum UV index of 1 transforms into these recommendations:
Most people face no serious problems with extended sun exposure, but those with fair skin, infants, and children always need protection. The Sun's harshest UV rays are around midday; it's wise to seek shade and limit time outdoors. In bright sunlight, prioritize sunglasses that grant protection from UVA and UVB radiation. 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
Gurnee, IL
- Average high temperature in December: 34°F
The warmest month (with the highest average high temperature) is July (77.5°F).
The month with the lowest average high temperature is January (27.9°F).
- Average low temperature in December: 25.3°F
The month with the highest average low temperature is July (65.3°F).
The coldest month (with the lowest average low temperature) is January (18.3°F).
Average pressure in December
Gurnee, IL
- Average pressure in December: 30.09"Hg
The month with the highest atmospheric pressure is January (30.1"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in December
Gurnee, IL
- Average wind speed in December: 11.1mph
The windiest month (with the highest average wind speed) is January (11.9mph).
The calmest month (with the lowest average wind speed) is August (7.3mph).
Average humidity in December
Gurnee, IL
- Average humidity in December: 81%
The month with the highest relative humidity is January (83%).
The months with the lowest relative humidity are October and November (75%).
Average rainfall in December
Gurnee, IL
- Average rainfall in December: 0.91"
The wettest months (with the highest rainfall) are June and August (2.68").
The driest month (with the least rainfall) is December (0.91").
Average rainfall days in December
Gurnee, IL
- Average rainfall days in December: 8.1 days
The month with the highest number of rainy days is July (17 days).
The month with the least rainy days is February (5.2 days).
Average snowfall in December
Gurnee, IL
- Average snowfall in December: 1.77"
The month with the highest snowfall is February (2.6").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Gurnee, IL
- Average snowfall days in December: 9.7 days
The month with the highest number of snowfall days is January (12.4 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Gurnee, IL
- Average daylight in December: 9h and 6min
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 6min).
- Average sunshine in December: 4h and 0min
The months with the most sunshine are July and August (Average sunshine: 10h and 30min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days in December
Gurnee, IL
- Average sunshine days in December: 15.5 days
The month with the most sunshine days is November (16.5 days).
The month with the least sunshine days is July (10.8 days).
Average UV index in December
Gurnee, IL
- Average UV index in December: 1
The months with the highest UV index are 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
Gurnee, IL
- Average cloud cover in December: 59
The month with the most cloud cover is January (Cloud cover 61).
The month with the least cloud cover is August (Cloud cover 27).
Average visibility in December
Gurnee, 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).
