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
Observing a mild shift, the average high-temperature during December reduces from November's fresh 53.8°F (12.1°C) to a frosty 43.9°F (6.6°C). Marion records an average nighttime low-temperature of 31.8°F (-0.1°C) throughout December.Humidity
The average relative humidity in December in Marion, Illinois, is 78%.Rainfall
In Marion, Illinois, in December, it is raining for 9.1 days, with typically 1.46" (37mm) of accumulated precipitation. Throughout the year, there are 137.6 rainfall days, and 23.03" (585mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through April, October through December. In December, it is snowing for 2.7 days. Throughout December, 0.91" (23mm) of snow is accumulated. In Marion, during the entire year, snow falls for 14.5 days and aggregates up to 4.13" (105mm) of snow.Daylight
With an average of 9h and 36min of daylight, December has the shortest days of the year.On the first day of December in Marion, sunrise is at 6:52 am and sunset at 4:37 pm. On the last day of the month, sunrise is at 7:10 am and sunset at 4:47 pm CST.
Sunshine
In December, the average sunshine is 4.7h.UV index
The months with the lowest UV index in Marion are January, February and December, with an average maximum UV index of 2. A UV Index value of 2, and less, symbolizes a minimal health hazard from unsafe exposure to UV radiation for average individuals.Note: The UV index of 2 during December translates into the following guidance:
Children must always have sun protection, unlike most people, who can tolerate up to an hour in the sun without any burns. Sun exposure should be minimized, especially during midday, to avoid harmful UV radiation. A hat with a broad brim is indispensable, filtering out up to half of UV rays. Take into account! The reflection from snow can nearly double the Sun's UV radiation intensity.
Frequently asked questions
Is it cold in Marion during December?
What is the average humidity in December in Marion?
How many days does it rain in December in Marion?
How much does it snow in Marion in December?
What is the month with the shortest days in Marion?
What is the average length of the day in December in Marion?
When is the sunrise / sunset in December in Marion?
How many hours of sunshine does Marion have in December?
When is the lowest UV index in Marion?
What is the UV index reading in December in Marion?
Average temperature in December
Marion, IL
- Average high temperature in December: 43.9°F
The warmest month (with the highest average high temperature) is July (87.4°F).
The month with the lowest average high temperature is January (39.6°F).
- Average low temperature in December: 31.8°F
The month with the highest average low temperature is July (68.5°F).
The coldest month (with the lowest average low temperature) is January (26.1°F).
Average pressure in December
Marion, IL
- Average pressure in December: 30.14"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed in December
Marion, IL
- Average wind speed in December: 8.8mph
The windiest months (with the highest average wind speed) are January and February (9.4mph).
The calmest months (with the lowest average wind speed) are July and August (5.8mph).
Average humidity in December
Marion, IL
- Average humidity in December: 78%
The month with the highest relative humidity is May (79%).
The month with the lowest relative humidity is October (71%).
Average rainfall in December
Marion, IL
- Average rainfall in December: 1.46"
The wettest month (with the highest rainfall) is April (3.11").
The driest month (with the least rainfall) is September (1.1").
Average rainfall days in December
Marion, IL
- Average rainfall days in December: 9.1 days
The month with the highest number of rainy days is July (15.3 days).
The month with the least rainy days is November (7.8 days).
Average snowfall in December
Marion, IL
- Average snowfall in December: 0.91"
The months with the highest snowfall are January and February (0.94").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Marion, IL
- Average snowfall days in December: 2.7 days
The month with the highest number of snowfall days is February (4.3 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
Marion, IL
- Average daylight in December: 9h and 4min
The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 36min).
- Average sunshine in December: 4h and 4min
The months with the most sunshine are June and July (Average sunshine: 10h and 30min).
The month with the least sunshine is January (Average sunshine: 4h and 36min).
Average sunshine days in December
Marion, IL
- Average sunshine days in December: 18.6 days
The month with the most sunshine days is October (20.6 days).
The month with the least sunshine days is July (12.9 days).
Average UV index in December
Marion, IL
- Average UV index in December: 2
The months with the highest UV index are May, June, July and August (UV index 6).
The months with the lowest UV index are January, February and December (UV index 2).
Average cloud cover in December
Marion, IL
- Average cloud cover in December: 49
The month with the most cloud cover is February (Cloud cover 51).
The months with the least cloud cover are June, August and September (Cloud cover 28).
Average visibility in December
Marion, IL
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Marion, Illinois, USA
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