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
The shift from November to December corresponds with a decrease in the average high-temperature, down to a wintry 32.4°F (0.2°C) from a chilly 43.7°F (6.5°C). December nights in Shirland are marked by an average low-temperature of 21.7°F (-5.7°C).Humidity
In Shirland, the average relative humidity in December is 83%.Rainfall
The months with the least rainfall in Shirland, Illinois, are February and December Rain falls for 5.5 days and accumulates 0.67" (17mm) of rain.Snowfall
January through April, October through December are months with snowfall. In Shirland, in December, during 8.5 snowfall days, 1.1" (28mm) of snow is typically accumulated. Throughout the year, there are 41.2 snowfall days, and 8.78" (223mm) of snow is accumulated.Daylight
December has the shortest days of the year, with an average of 9h and 6min of daylight.On the first day of the month, sunrise is at 7:07 am and sunset at 4:24 pm. On the last day of December, in Shirland, sunrise is at 7:26 am and sunset at 4:34 pm CST.
Sunshine
In Shirland, Illinois, the average sunshine in December is 3.8h.UV index
January and December, with an average maximum UV index of 1, are months with the lowest UV index. A UV Index value of 2, and less, symbolizes a minimal health hazard from exposure to the Sun's UV rays for the average person.Note: The daily high UV index of 1 during December translates into the following recommendations:
Children, babies, and those with sensitive skin should always be shielded from long periods of sun exposure. The most potent solar radiation is around mid-day, so one should minimize exposure to direct sunlight during this period. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes. Note this! The Sun's UV radiation can nearly be doubled by the reflection off snow.
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Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is it in Shirland in December?
What is the average humidity in December in Shirland?
What is the driest month in Shirland?
How much does it rain in Shirland in December?
How much does it snow in Shirland in December?
What is the month with the shortest days in Shirland?
What is the average length of the day in December in Shirland?
When are sunrise and sunset in December in Shirland?
How long on average sun shines in December in Shirland?
When is the lowest UV index in Shirland?
How high is the UV index in December in Shirland?
Average temperature in December
Shirland, IL
- Average high temperature in December: 32.4°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 (25.2°F).
- Average low temperature in December: 21.7°F
The month with the highest average low temperature is July (62.4°F).
The coldest month (with the lowest average low temperature) is January (12.7°F).
Average pressure in December
Shirland, IL
- Average pressure in December: 30.09"Hg
The month with the highest atmospheric pressure is January (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in December
Shirland, IL
- Average wind speed in December: 9.3mph
The windiest month (with the highest average wind speed) is April (10.1mph).
The calmest month (with the lowest average wind speed) is August (6.4mph).
Average humidity in December
Shirland, IL
- Average humidity in December: 83%
The month with the highest relative humidity is January (87%).
The months with the lowest relative humidity are April and October (76%).
Average rainfall in December
Shirland, IL
- Average rainfall in December: 0.67"
The wettest month (with the highest rainfall) is June (2.28").
The driest months (with the least rainfall) are February and December (0.67").
Average rainfall days in December
Shirland, IL
- Average rainfall days in December: 5.5 days
The months with the highest number of rainy days are May and June (15.3 days).
The month with the least rainy days is January (3.1 days).
Average snowfall in December
Shirland, IL
- Average snowfall in December: 1.1"
The month with the highest snowfall is January (2.52").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Shirland, IL
- Average snowfall days in December: 8.5 days
The month with the highest number of snowfall days is January (11.5 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
Shirland, 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 30min).
The months with the least sunshine are January and February (Average sunshine: 3h and 30min).
Average sunshine days in December
Shirland, IL
- Average sunshine days in December: 17.8 days
The month with the most sunshine days is November (19 days).
The month with the least sunshine days is June (12.8 days).
Average UV index in December
Shirland, IL
- Average UV index in December: 1
The month with the highest UV index is June (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in December
Shirland, 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 September (Cloud cover 35).
Average visibility in December
Shirland, 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).
Shirland, Illinois, USA
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