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 brings a decrease in the average high-temperature, falling from November's frosty 43.7°F (6.5°C) to a wintry 32.4°F (0.2°C). South Beloit reports a consistent average low-temperature of 21.7°F (-5.7°C) throughout December nights.Humidity
In South Beloit, the average relative humidity in December is 83%.Rainfall
The months with the least rainfall 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 South Beloit, Illinois, in December, snow falls for 8.5 days, with typically accumulated 1.1" (28mm) of snow. In South Beloit, Illinois, during the entire year, snow falls for 41.2 days and aggregates up to 8.78" (223mm) of snow.Daylight
The month with the shortest days is December, with an average of 9h and 6min of daylight.On the first day of December, sunrise is at 7:06 am and sunset at 4:24 pm. On the last day of the month, sunrise is at 7:25 am and sunset at 4:33 pm CST.
Sunshine
The average sunshine in December in South Beloit is 3.8h.UV index
The months with the lowest UV index in South Beloit are January and December, with an average maximum UV index of 1. A UV Index estimate of 2, and below, represents a minimal health vulnerability from exposure to the Sun's UV radiation for the average person.Note: The maximum UV index of 1 during December translates into these guidelines:
Children, babies, and those with sensitive skin should always be shielded from long periods of sun exposure. Given the potency of the midday Sun's UV radiation, one should avoid prolonged exposure. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Attention! Nearly twice the Sun's UV radiation can be reflected by snow.
Frequently asked questions
How cold is December in South Beloit?
What is the average humidity in December in South Beloit?
What is the driest month in South Beloit?
How much does it rain in South Beloit in December?
How much does it snow in South Beloit in December?
What is the month with the shortest days in South Beloit?
What is the average length of the day in December in South Beloit?
When is the sunrise / sunset in December in South Beloit?
How many hours of sunshine does South Beloit have in December?
What is the month with the lowest UV index in South Beloit?
How high is the UV index in December in South Beloit?
Average temperature in December
South Beloit, 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
South Beloit, 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
South Beloit, 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
South Beloit, 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
South Beloit, 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
South Beloit, 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
South Beloit, 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
South Beloit, 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
South Beloit, 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
South Beloit, 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
South Beloit, 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
South Beloit, 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
South Beloit, 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).
South Beloit, Illinois, USA
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