December weather forecastHighwood, IL
December
Weather in December
December, the first month of the winter in Highwood, is still a cold month, with temperature in the range of an average low of 26.2°F (-3.2°C) and an average high of 34.5°F (1.4°C).Temperature
As Highwood enters December, the average high-temperature decreases from the a chilly 45.5°F (7.5°C) of November to a wintry 34.5°F (1.4°C). A consistent average low-temperature of 26.2°F (-3.2°C), with a minor variance from the daytime highs, is noted during the nights of December.Humidity
The average relative humidity in December in Highwood 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 Highwood are January through April, October through December. In December, it is snowing for 9.1 days. Throughout December, 2.05" (52mm) of snow is accumulated. In Highwood, during the entire year, snow falls for 42.9 days and aggregates up to 13.82" (351mm) of snow.Daylight
With an average of 9h and 12min of daylight, December has the shortest days of the year in Highwood.On the first day of December in Highwood, sunrise is at 7:00 am and sunset at 4:20 pm. On the last day of the month, sunrise is at 7:19 am and sunset at 4:29 pm CST.
Sunshine
The average sunshine in December is 4.1h.UV index
With an average maximum UV index of 1, December is the month with the lowest UV index in Highwood. A UV Index estimate of 2, and below, represents a minimal health hazard from exposure to the Sun's UV rays for ordinary individuals.Note: In December, the maximum UV index of 1 suggests this advice:
Infants, children, and people with sensitive skin should always have protection against lengthy periods of sun exposure. When the Sun is at its strongest around midday, find shade and limit exposure. Select sunglasses that boast both UVA and UVB protection to limit the adverse effects of the sun on the eyes. Be attentive! The reflective property of snow can nearly double the Sun's UV radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Highwood, 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
Highwood, 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
Highwood, 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
Highwood, 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
Highwood, 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
Highwood, 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
Highwood, 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
Highwood, 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
Highwood, 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
Highwood, 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
Highwood, 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
Highwood, 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
Highwood, 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).
