December weather forecastHighland Park, IL
December
Weather in December
The first month of the winter, December, is still a cold month in Highland Park, Illinois, with an average temperature fluctuating between 34.5°F (1.4°C) and 26.2°F (-3.2°C).Temperature
As Highland Park enters December, the average high-temperature decreases from the a frosty 45.5°F (7.5°C) of November to an icy 34.5°F (1.4°C). In Highland Park, December is characterized by an average low-temperature of 26.2°F (-3.2°C), indicating a minor drop from daytime highs.Humidity
In Highland Park, the average relative humidity in December is 80%.Rainfall
The month with the least rainfall is December, when the rain falls for 8.6 days and typically collects 1.3" (33mm) of precipitation.Snowfall
Months with snowfall in Highland Park are January through April, October through December. In December, in Highland Park, it is snowing for 9.1 days. Throughout December, 2.05" (52mm) of snow is accumulated. In Highland Park, during the entire year, snow falls for 42.9 days and aggregates up to 13.82" (351mm) of snow.Daylight
The month with the shortest days in Highland Park is December, with an average of 9h and 12min of daylight.On the first day of the month, sunrise is at 7:00 am and sunset at 4:20 pm. On the last day of December, in Highland Park, sunrise is at 7:19 am and sunset at 4:29 pm CST.
Sunshine
In Highland Park, the average sunshine in December is 4.1h.UV index
The month with the lowest UV index in Highland Park is December, with an average maximum UV index of 1. A UV Index value of 2, and less, symbolizes a minimal health hazard from exposure to the Sun's UV radiation for ordinary individuals.Note: A maximum UV index of 1 in December translates into the following recommendations:
Most people face no serious problems with extended sun exposure, but those with fair skin, infants, and children always need protection. Avoid the Sun's strongest UV rays by seeking shade and limiting exposure during midday. Wearing a wide-brim hat can block approximately 50% of UV radiation, protecting the eyes. Be aware! The reflective nature of snow can magnify the Sun's UV radiation almost twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Highland Park, IL
- Average high temperature in December: 34.5°F
The warmest month (with the highest average high temperature) is July (77.7°F).
The month with the lowest average high temperature is January (28.6°F).
- Average low temperature in December: 26.2°F
The months with the highest average low temperature are July and August (66.7°F).
The coldest month (with the lowest average low temperature) is January (18.9°F).
Average pressure in December
Highland Park, 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
Highland Park, IL
- Average wind speed in December: 11.2mph
The windiest month (with the highest average wind speed) is January (11.9mph).
The calmest month (with the lowest average wind speed) is August (7.4mph).
Average humidity in December
Highland Park, IL
- Average humidity in December: 80%
The months with the highest relative humidity are January and February (82%).
The month with the lowest relative humidity is October (73%).
Average rainfall in December
Highland Park, IL
- Average rainfall in December: 1.3"
The wettest months (with the highest rainfall) are May and June (3.82").
The driest month (with the least rainfall) is December (1.3").
Average rainfall days in December
Highland Park, IL
- Average rainfall days in December: 8.6 days
The month with the highest number of rainy days is May (17.7 days).
The month with the least rainy days is February (5.9 days).
Average snowfall in December
Highland Park, IL
- Average snowfall in December: 2.05"
The month with the highest snowfall is January (4.13").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Highland Park, IL
- Average snowfall days in December: 9.1 days
The month with the highest number of snowfall days is January (11.9 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
Highland Park, 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 6min
The month with the most sunshine is August (Average sunshine: 10h and 42min).
The month with the least sunshine is January (Average sunshine: 3h and 48min).
Average sunshine days in December
Highland Park, IL
- Average sunshine days in December: 15.3 days
The month with the most sunshine days is December (15.3 days).
The month with the least sunshine days is April (10.8 days).
Average UV index in December
Highland Park, IL
- Average UV index in December: 1
The months with the highest UV index are June, July and August (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in December
Highland Park, IL
- Average cloud cover in December: 58
The month with the most cloud cover is January (Cloud cover 61).
The months with the least cloud cover are July and August (Cloud cover 27).
Average visibility in December
Highland Park, 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).
