Contents
- Weather in December
- Frequently asked questions
- Average temperature in December
- Average pressure in December
- Average wind speed in December
- Average humidity in December
- Average rainfall in December
- Average rainfall days in December
- Average snowfall in December
- Average snowfall days in December
- Average daylight in December
- Average sunshine in December
- Average sunshine days in December
- Average UV index in December
- Average cloud cover in December
- Average visibility in December
Weather in December
Temperature
A decrease in the average high-temperature is observed during December, shifting from a frosty 43.7°F (6.5°C) in November to a freezing cold 31.1°F (-0.5°C). December generally records an average low-temperature of 21.2°F (-6°C).Humidity
In December, the average relative humidity in Hebron is 84%.Rainfall
December is the month with the least rainfall in Hebron. Rain falls for 6.5 days and accumulates 0.55" (14mm) of precipitation.Snowfall
January through May, October through December are months with snowfall. In Hebron, in December, snow falls for 9.5 days, with typically accumulated 0.98" (25mm) of snow. Throughout the year, in Hebron, there are 46.4 snowfall days, and 7.48" (190mm) of snow is accumulated.Daylight
December has the shortest days of the year in Hebron, with an average of 9h and 6min of daylight.On the first day of December in Hebron, sunrise is at 7:04 am and sunset at 4:21 pm. On the last day of the month, sunrise is at 7:23 am and sunset at 4:30 pm CST.
Sunshine
In December, the average sunshine in Hebron, Illinois, is 3.8h.UV index
The months with the lowest UV index in Hebron are January, November and December, with an average maximum UV index of 1. A UV Index of 2, and less, symbolizes a low threat to health from exposure to the Sun's UV rays for the ordinary person.Note: The maximum daily UV index, 1 in December, converts into the following recommendations:
While sun exposure does not greatly affect most, individuals with fair skin, babies, and children always need vigilant safeguarding. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. Wearing a wide-brim hat can block approximately 50% of UV radiation, protecting the eyes. Take careful note! The UV radiation of the Sun can be nearly doubled by snow reflection.
Frequently asked questions
How cold is it in Hebron in December?
What is the average humidity in December in Hebron?
What is the driest month in Hebron?
How many days does it rain in December in Hebron?
How much does it snow in Hebron in December?
What is the month with the shortest days in Hebron?
How many hours of daylight does Hebron have in December?
When are sunrise and sunset in December in Hebron?
How long on average sun shines in December in Hebron?
When is the lowest UV index in Hebron?
How high is the UV index in December in Hebron?
Average temperature in December
Hebron, IL
- Average high temperature in December: 31.1°F
The warmest month (with the highest average high temperature) is July (79.3°F).
The month with the lowest average high temperature is January (24.3°F).
- Average low temperature in December: 21.2°F
The month with the highest average low temperature is July (61.5°F).
The coldest month (with the lowest average low temperature) is January (12.2°F).
Average pressure in December
Hebron, IL
- Average pressure in December: 30.09"Hg
The months with the highest atmospheric pressure are January and February (30.1"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in December
Hebron, IL
- Average wind speed in December: 9.1mph
The windiest month (with the highest average wind speed) is April (9.9mph).
The calmest month (with the lowest average wind speed) is August (6.3mph).
Average humidity in December
Hebron, IL
- Average humidity in December: 84%
The month with the highest relative humidity is January (88%).
The month with the lowest relative humidity is April (76%).
Average rainfall in December
Hebron, IL
- Average rainfall in December: 0.55"
The wettest month (with the highest rainfall) is July (1.93").
The driest month (with the least rainfall) is December (0.55").
Average rainfall days in December
Hebron, IL
- Average rainfall days in December: 6.5 days
The months with the highest number of rainy days are May and July (15.7 days).
The month with the least rainy days is January (2.8 days).
Average snowfall in December
Hebron, IL
- Average snowfall in December: 0.98"
The month with the highest snowfall is January (2.13").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Hebron, IL
- Average snowfall days in December: 9.5 days
The month with the highest number of snowfall days is January (12.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Hebron, IL
- Average daylight in December: 9h and 1min
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: 3h and 5min
The months with the most sunshine are July and August (Average sunshine: 9h and 42min).
The month with the least sunshine is January (Average sunshine: 3h and 24min).
Average sunshine days in December
Hebron, IL
- Average sunshine days in December: 17.7 days
The month with the most sunshine days is November (18.7 days).
The month with the least sunshine days is July (11.6 days).
Average UV index in December
Hebron, IL
- Average UV index in December: 1
The months with the highest UV index are May, June, July and August (UV index 5).
The months with the lowest UV index are January, November and December (UV index 1).
Average cloud cover in December
Hebron, IL
- Average cloud cover in December: 61
The month with the most cloud cover is January (Cloud cover 65).
The month with the least cloud cover is August (Cloud cover 34).
Average visibility in December
Hebron, IL
- Average visibility in December: 6mi
The months with the highest visibility are March, April, May, June, October, November and December (6mi).
The months with the lowest visibility are January, February, July, August and September (5mi).
Hebron, Illinois, USA
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