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
December's arrival comes with a decrease in the average high-temperature, moving from a chilly 46.8°F (8.2°C) in November to a wintry 34.7°F (1.5°C). Standard usually reports an average low-temperature of 24.4°F (-4.2°C) during the month of December.Humidity
In Standard, the average relative humidity in December is 82%.Rainfall
January and December are months with the least rain when the rain falls for 7.5 days and typically aggregates up to 1.61" (41mm) of rain.Snowfall
January through April, October through December are months with snowfall. In Standard, Illinois, in December, snow falls for 8 days, with typically accumulated 2.6" (66mm) of snow. Throughout the year, in Standard, Illinois, there are 39.5 snowfall days, and 15.31" (389mm) of snow is accumulated.Daylight
With an average of 9h and 18min of daylight, December has the shortest days of the year in Standard.On the first day of December in Standard, sunrise is at 7:03 am and sunset at 4:28 pm. On the last day of the month, sunrise is at 7:22 am and sunset at 4:37 pm CST.
Sunshine
In Standard, the average sunshine in December is 4.2h.UV index
The months with the lowest UV index are January and December, with an average maximum UV index of 1. A UV Index value of 2, and less, symbolizes a minimal health hazard from unprotected exposure to Sun's UV rays for the average person.Note: A maximum high UV index of 1 in December translates into the following recommendations:
Although prolonged sun exposure does not typically bother most people, children, babies, and those with sensitive skin should always have protection. For health reasons, it's advisable to reduce direct sun exposure during peak hours around midday. Consider a wide-brim hat essential for effective sun defense covering your face, neck, and eyes. Pay attention! The reflection of snow can enhance the Sun's UV radiation almost double.
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Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is December in Standard?
What is the average humidity in December in Standard?
What is the driest month in Standard?
How much does it rain in Standard in December?
How much does it snow in Standard in December?
What is the month with the shortest days in Standard?
What is the average length of the day in December in Standard?
When is the sunrise / sunset in December in Standard?
How many hours of sunshine does Standard have in December?
When is the lowest UV index in Standard?
What is the UV index intensity in December in Standard?
Average temperature in December
Standard, IL
- Average high temperature in December: 34.7°F
The warmest month (with the highest average high temperature) is July (80.8°F).
The month with the lowest average high temperature is January (28.9°F).
- Average low temperature in December: 24.4°F
The month with the highest average low temperature is July (64.2°F).
The coldest month (with the lowest average low temperature) is January (16.9°F).
Average pressure in December
Standard, IL
- Average pressure in December: 30.1"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in December
Standard, IL
- Average wind speed in December: 9.6mph
The windiest month (with the highest average wind speed) is April (10.4mph).
The calmest month (with the lowest average wind speed) is August (6.3mph).
Average humidity in December
Standard, IL
- Average humidity in December: 82%
The month with the highest relative humidity is July (85%).
The month with the lowest relative humidity is October (72%).
Average rainfall in December
Standard, IL
- Average rainfall in December: 1.61"
The wettest month (with the highest rainfall) is May (4.69").
The driest months (with the least rainfall) are January and December (1.61").
Average rainfall days in December
Standard, IL
- Average rainfall days in December: 7.5 days
The month with the highest number of rainy days is May (18.9 days).
The month with the least rainy days is January (5.9 days).
Average snowfall in December
Standard, IL
- Average snowfall in December: 2.6"
The month with the highest snowfall is January (4.09").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Standard, IL
- Average snowfall days in December: 8 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 and August (0 days).
Average daylight in December /
Average sunshine in December
Standard, IL
- Average daylight in December: 9h and 2min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in December: 4h and 1min
The months with the most sunshine are June, July and August (Average sunshine: 9h and 48min).
The month with the least sunshine is January (Average sunshine: 3h and 54min).
Average sunshine days in December
Standard, IL
- Average sunshine days in December: 16.2 days
The month with the most sunshine days is November (17.5 days).
The month with the least sunshine days is April (10.2 days).
Average UV index in December
Standard, IL
- Average UV index in December: 1
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in December
Standard, IL
- Average cloud cover in December: 55
The month with the most cloud cover is January (Cloud cover 59).
The months with the least cloud cover are August and September (Cloud cover 32).
Average visibility in December
Standard, 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).
Standard, Illinois, USA
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