December weather forecastScales Mound, IL
December
Weather in December
Scales Mound in December is a true winter wonderland, with temperatures dropping to their lowest, averaging a chilly 31.8°F (-0.1°C) high and 21.4°F (-5.9°C) low. The curtain falls on the year with icy weather gripping the city. The chill permeates the city, paving the way for warm hearths and hearty stories. Snowfall increases, painting the city white. Despite the frosty conditions, the Scales Mound exhibits a holiday spirit, ending the year on a high note.Temperature
December is characterized by a reduction in the average high-temperature, from a chilly 44.2°F (6.8°C) in November to a freezing cold 31.8°F (-0.1°C). During the nights in December, Scales Mound observes an average low-temperature of 21.4°F (-5.9°C).Humidity
In December, the average relative humidity is 83%.Rainfall
In December, the rain falls for 7.6 days. Throughout December, 1.5" (38mm) of precipitation is accumulated. In Scales Mound, during the entire year, the rain falls for 153.1 days and collects up to 30.75" (781mm) of precipitation.Snowfall
Months with snowfall are January through April, October through December. In Scales Mound, in December, snow falls for 10.5 days, with typically accumulated 3.03" (77mm) of snow. Throughout the year, there are 46.9 snowfall days, and 17.52" (445mm) of snow is accumulated.Daylight
The month with the shortest days in Scales Mound is December, with an average of 9h and 6min of daylight.On the first day of the month, sunrise is at 7:11 am and sunset at 4:29 pm. On the last day of December, in Scales Mound, sunrise is at 7:30 am and sunset at 4:38 pm CST.
Sunshine
In December, the average sunshine in Scales Mound, Illinois, is 4.1h.UV index
January and December, with an average maximum UV index of 1, are months with the lowest UV index in Scales Mound, Illinois. A UV Index value of 2, and less, symbolizes a low threat to health from unsafe exposure to UV radiation for the average person.Note: In December, the average maximum UV index of 1 translates into the following recommendations:
Despite the majority tolerating prolonged sun exposure, those with sensitive skin, infants, and children demand continual protection. Direct Sun exposure should be minimized especially during midday when radiation is most intense. Employ a wide-brim hat for potent defense against up to 50% of UV rays. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Scales Mound, IL
- Average high temperature in December: 31.8°F
The warmest month (with the highest average high temperature) is July (79.7°F).
The month with the lowest average high temperature is January (25°F).
- Average low temperature in December: 21.4°F
The month with the highest average low temperature is July (63°F).
The coldest month (with the lowest average low temperature) is January (12.4°F).
Average pressure in December
Scales Mound, 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 (29.9"Hg).
Average wind speed in December
Scales Mound, 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 (6.6mph).
Average humidity in December
Scales Mound, 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
Scales Mound, IL
- Average rainfall in December: 1.5"
The wettest month (with the highest rainfall) is June (4.29").
The driest month (with the least rainfall) is January (1.26").
Average rainfall days in December
Scales Mound, IL
- Average rainfall days in December: 7.6 days
The month with the highest number of rainy days is May (20 days).
The month with the least rainy days is February (4.8 days).
Average snowfall in December
Scales Mound, IL
- Average snowfall in December: 3.03"
The month with the highest snowfall is January (5.12").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Scales Mound, IL
- Average snowfall days in December: 10.5 days
The month with the highest number of snowfall days is January (13.2 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
Scales Mound, IL
- Average daylight in December: 9h and 6min
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: 4h and 6min
The month with the most sunshine is August (Average sunshine: 9h and 48min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days in December
Scales Mound, IL
- Average sunshine days in December: 15.7 days
The month with the most sunshine days is November (17.1 days).
The month with the least sunshine days is June (7.9 days).
Average UV index in December
Scales Mound, IL
- Average UV index in December: 1
The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in December
Scales Mound, 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
Scales Mound, IL
- Average visibility in December: 6mi
The months with the highest visibility are March, April, May, June, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February and July (5mi).
