December weather forecastSheldon, IL
December
Weather in December
The first month of the winter, December, is also an icy month in Sheldon, Illinois, with an average temperature fluctuating between 26.6°F (-3°C) and 36.7°F (2.6°C).Temperature
Sheldon's progression into December includes a drop in the average high-temperature, from a chilly 47.8°F (8.8°C) in November to a cold 36.7°F (2.6°C). Sheldon observes an average low-temperature of 26.6°F (-3°C) during December nights.Humidity
In December, the average relative humidity is 81%.Rainfall
In December, in Sheldon, the rain falls for 6.6 days. Throughout December, 0.91" (23mm) of precipitation is accumulated. In Sheldon, during the entire year, the rain falls for 140.3 days and collects up to 17.56" (446mm) of precipitation.Snowfall
January through April, November and December are months with snowfall. In Sheldon, in December, snow falls for 8 days, with typically accumulated 1.3" (33mm) of snow. In Sheldon, during the entire year, snow falls for 36.9 days and aggregates up to 7.56" (192mm) of snow.Daylight
With an average of 9h and 18min of daylight, December has the shortest days of the year in Sheldon.On the first day of December, sunrise is at 6:55 am and sunset at 4:23 pm. On the last day of the month, sunrise is at 7:14 am and sunset at 4:32 pm CST.
Sunshine
In December, the average sunshine 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 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 in December translates into this advice:
Children necessitate constant protection from sunlight, unlike the majority, who can remain under the sun for about an hour without burning. The solar radiation around mid-day is intense; avoid the Sun and stay safe. Tightly woven clothing, when worn loosely, shields effectively against the Sun. Remember this! The UV radiation of the Sun can be nearly doubled by the reflective properties of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Sheldon, IL
- Average high temperature in December: 36.7°F
The warmest month (with the highest average high temperature) is July (81°F).
The month with the lowest average high temperature is January (30.7°F).
- Average low temperature in December: 26.6°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 (18.9°F).
Average pressure in December
Sheldon, IL
- Average pressure in December: 30.11"Hg
The month with the highest atmospheric pressure is January (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in December
Sheldon, IL
- Average wind speed in December: 9.6mph
The windiest month (with the highest average wind speed) is January (10.3mph).
The calmest month (with the lowest average wind speed) is August (6.2mph).
Average humidity in December
Sheldon, IL
- Average humidity in December: 81%
The month with the highest relative humidity is July (85%).
The month with the lowest relative humidity is October (72%).
Average rainfall in December
Sheldon, IL
- Average rainfall in December: 0.91"
The wettest month (with the highest rainfall) is May (2.64").
The driest months (with the least rainfall) are January and February (0.79").
Average rainfall days in December
Sheldon, IL
- Average rainfall days in December: 6.6 days
The month with the highest number of rainy days is July (17.8 days).
The month with the least rainy days is January (4.9 days).
Average snowfall in December
Sheldon, IL
- Average snowfall in December: 1.3"
The month with the highest snowfall is January (2.05").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in December
Sheldon, IL
- Average snowfall days in December: 8 days
The month with the highest number of snowfall days is January (10.3 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
Sheldon, IL
- Average daylight in December: 9h and 18min
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 12min
The months with the most sunshine are June and July (Average sunshine: 9h and 48min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days in December
Sheldon, IL
- Average sunshine days in December: 17.4 days
The month with the most sunshine days is November (19 days).
The month with the least sunshine days is July (9.4 days).
Average UV index in December
Sheldon, 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
Sheldon, IL
- Average cloud cover in December: 57
The month with the most cloud cover is January (Cloud cover 61).
The months with the least cloud cover are July, August and September (Cloud cover 34).
Average visibility in December
Sheldon, IL
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are July and August (5mi).
