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
Combs experiences a temperature shift at the start of December, with average high-temperatures adjusting from a chilly 49.1°F (9.5°C) in November to a wintry 37.9°F (3.3°C). The average temperature during December nights dips to a subzero cold 27.5°F (-2.5°C).Humidity
In Combs, the average relative humidity in December is 79%.Rainfall
The month with the least rainfall in Combs is December, when the rain falls for 7.4 days and typically collects 0.91" (23mm) of precipitation.Snowfall
Months with snowfall are January through April, November and December. In December, it is snowing for 4.5 days. Throughout December, 0.79" (20mm) of snow is accumulated. Throughout the year, there are 23.2 snowfall days, and 5.83" (148mm) of snow is accumulated.Daylight
December has the shortest days of the year in Combs, with an average of 9h and 24min of daylight.On the first day of the month, sunrise is at 6:58 am and sunset at 4:29 pm. On the last day of December, in Combs, sunrise is at 7:16 am and sunset at 4:39 pm CST.
Sunshine
In December, the average sunshine is 4.4h.UV index
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index estimate of 2, and below, represents a minimal health hazard from exposure to the Sun's UV radiation for ordinary individuals.Note: The maximum daily UV index of 2 in December interprets into the following recommendations:
Babies, children, and individuals with sensitive skin should always have protection against extended sun exposure. Midday is the peak time for the Sun's radiation; stay in the shade and protect yourself. In bright sunlight, prioritize sunglasses that grant protection from UVA and UVB radiation. Be alert! Nearly double the UV rays from the Sun can be reflected by snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Is it cold in Combs during December?
What is the average humidity in December in Combs?
What is the driest month in Combs?
How many days does it rain in December in Combs?
How many days does it snow in December in Combs?
What is the month with the shortest days in Combs?
How many hours of daylight does Combs have in December?
When are sunrise and sunset in December in Combs?
How long on average sun shines in December in Combs?
What are the months with the lowest UV index in Combs?
What is the UV index intensity in December in Combs?
Average temperature in December
Combs, IL
- Average high temperature in December: 37.9°F
The warmest month (with the highest average high temperature) is July (81.9°F).
The month with the lowest average high temperature is January (32.4°F).
- Average low temperature in December: 27.5°F
The month with the highest average low temperature is July (64.9°F).
The coldest month (with the lowest average low temperature) is January (20.3°F).
Average pressure in December
Combs, IL
- Average pressure in December: 30.12"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in December
Combs, IL
- Average wind speed in December: 10.2mph
The windiest month (with the highest average wind speed) is January (10.9mph).
The calmest month (with the lowest average wind speed) is August (6.4mph).
Average humidity in December
Combs, IL
- Average humidity in December: 79%
The month with the highest relative humidity is July (85%).
The month with the lowest relative humidity is October (70%).
Average rainfall in December
Combs, IL
- Average rainfall in December: 0.91"
The wettest month (with the highest rainfall) is May (2.09").
The driest month (with the least rainfall) is December (0.91").
Average rainfall days in December
Combs, IL
- Average rainfall days in December: 7.4 days
The month with the highest number of rainy days is May (16.3 days).
The month with the least rainy days is February (5.2 days).
Average snowfall in December
Combs, IL
- Average snowfall in December: 0.79"
The month with the highest snowfall is January (2.05").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in December
Combs, IL
- Average snowfall days in December: 4.5 days
The month with the highest number of snowfall days is January (8.3 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in December /
Average sunshine in December
Combs, IL
- Average daylight in December: 9h and 2min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in December: 4h and 2min
The month with the most sunshine is June (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 3h and 54min).
Average sunshine days in December
Combs, IL
- Average sunshine days in December: 19.1 days
The month with the most sunshine days is November (19.6 days).
The month with the least sunshine days is May (12.3 days).
Average UV index in December
Combs, IL
- Average UV index in December: 2
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in December
Combs, IL
- Average cloud cover in December: 54
The month with the most cloud cover is January (Cloud cover 57).
The months with the least cloud cover are June, August and September (Cloud cover 32).
Average visibility in December
Combs, IL
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are July and August (5mi).
Combs, Illinois, USA
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