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
Onset of December comes with a temperature decline, the average high falling from a chilly 45°F (7.2°C) in November to an icy 32.5°F (0.3°C). The nighttime temperature, during December, averages of 22.5°F (-5.3°C).Humidity
In Mount Carroll, the average relative humidity in December is 82%.Rainfall
In Mount Carroll, in December, it is raining for 5.9 days, with typically 0.79" (20mm) of accumulated precipitation. In Mount Carroll, during the entire year, the rain falls for 123.8 days and collects up to 17.05" (433mm) of precipitation.Snowfall
Months with snowfall in Mount Carroll are January through April, October through December. In December, it is snowing for 8.4 days. Throughout December, 1.38" (35mm) of snow is accumulated. In Mount Carroll, during the entire year, snow falls for 37.4 days and aggregates up to 8.11" (206mm) of snow.Daylight
December has the shortest days of the year, with an average of 9h and 12min of daylight.On the first day of December, sunrise is at 7:09 am and sunset at 4:29 pm. On the last day of the month, sunrise is at 7:28 am and sunset at 4:38 pm CST.
Sunshine
The average sunshine in December is 4h.UV index
January and December, with an average maximum UV index of 1, are months with the lowest UV index. A UV Index estimate of 2, and below, represents a low health risk from unsafe exposure to UV radiation for ordinary individuals.Note: In December, an average UV index of 1 transforms into the following instructions:
For the majority, extended sun exposure is not of great concern. Infants and people with sensitive skin must always be protected. During midday, the Sun's radiation is strongest, and it's advisable to reduce direct exposure. Combat UV radiation's detrimental effects with sun-safe clothing and UV-blocking eyewear. Guard yourself! Snow reflection can almost double the UV radiation from the Sun.
Frequently asked questions
How cold is it in Mount Carroll in December?
What is the average humidity in December in Mount Carroll?
How much does it rain in Mount Carroll in December?
How many days does it snow in December in Mount Carroll?
What is the month with the shortest days in Mount Carroll?
How many hours of daylight does Mount Carroll have in December?
When is the sunrise / sunset in December in Mount Carroll?
How many hours of sunshine does Mount Carroll have in December?
What are the months with the lowest UV index in Mount Carroll?
What is the UV index intensity in December in Mount Carroll?
Average temperature in December
Mount Carroll, IL
- Average high temperature in December: 32.5°F
The warmest month (with the highest average high temperature) is July (79.9°F).
The month with the lowest average high temperature is January (26.1°F).
- Average low temperature in December: 22.5°F
The month with the highest average low temperature is July (63.3°F).
The coldest month (with the lowest average low temperature) is January (13.5°F).
Average pressure in December
Mount Carroll, IL
- Average pressure in December: 30.1"Hg
The month with the highest atmospheric pressure is January (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in December
Mount Carroll, IL
- Average wind speed in December: 9.4mph
The windiest month (with the highest average wind speed) is April (10.4mph).
The calmest month (with the lowest average wind speed) is August (6.5mph).
Average humidity in December
Mount Carroll, IL
- Average humidity in December: 82%
The month with the highest relative humidity is January (86%).
The month with the lowest relative humidity is October (74%).
Average rainfall in December
Mount Carroll, IL
- Average rainfall in December: 0.79"
The wettest month (with the highest rainfall) is May (2.52").
The driest months (with the least rainfall) are January and February (0.67").
Average rainfall days in December
Mount Carroll, IL
- Average rainfall days in December: 5.9 days
The month with the highest number of rainy days is May (17.2 days).
The month with the least rainy days is February (3.9 days).
Average snowfall in December
Mount Carroll, IL
- Average snowfall in December: 1.38"
The month with the highest snowfall is January (2.48").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Mount Carroll, IL
- Average snowfall days in December: 8.4 days
The month with the highest number of snowfall days is January (10.6 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
Mount Carroll, 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 12min).
- Average sunshine in December: 4h and 0min
The month with the most sunshine is July (Average sunshine: 9h and 42min).
The months with the least sunshine are January and February (Average sunshine: 3h and 42min).
Average sunshine days in December
Mount Carroll, IL
- Average sunshine days in December: 18.6 days
The month with the most sunshine days is November (19.9 days).
The month with the least sunshine days is June (11.1 days).
Average UV index in December
Mount Carroll, IL
- Average UV index in December: 1
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in December
Mount Carroll, IL
- Average cloud cover in December: 58
The month with the most cloud cover is January (Cloud cover 62).
The month with the least cloud cover is September (Cloud cover 32).
Average visibility in December
Mount Carroll, IL
- Average visibility in December: 6mi
The months with the highest visibility are February, March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are January, July and August (5mi).
Mount Carroll, Illinois, USA
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