December weather forecastSun River Terrace, IL
December
Weather in December
December, the first month of the winter in Sun River Terrace, is still a cold month, with an average temperature ranging between max 36.1°F (2.3°C) and min 25.7°F (-3.5°C).Temperature
Sun River Terrace in December undergoes a mild reduction in the average high-temperature, shifting from November's frosty 47.3°F (8.5°C) to an icy 36.1°F (2.3°C). The month of December records an average low-temperature of 25.7°F (-3.5°C).Humidity
In December, the average relative humidity is 81%.Rainfall
In Sun River Terrace, during December, the rain falls for 7 days and regularly aggregates up to 0.79" (20mm) of precipitation. In Sun River Terrace, Illinois, during the entire year, the rain falls for 132 days and collects up to 15.16" (385mm) of precipitation.Snowfall
Months with snowfall are January through April, November and December. In Sun River Terrace, in December, during 7.5 snowfall days, 0.87" (22mm) of snow is typically accumulated. Throughout the year, in Sun River Terrace, there are 36.5 snowfall days, and 5.28" (134mm) of snow is accumulated.Daylight
With an average of 9h and 18min of daylight, December has the shortest days of the year.On the first day of the month, sunrise is at 6:57 am and sunset at 4:23 pm. On the last day of December, sunrise is at 7:16 am and sunset at 4:32 pm CST.
Sunshine
The average sunshine in December in Sun River Terrace 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 unsafe exposure to UV radiation for the ordinary person.Note: The maximum daily UV index of 1 in December converts into the following recommendations:
Many can withstand an hour in the sun without burning, yet children must always have protection against sunlight. The mid-day Sun emits the most powerful UV radiation, so seek shade and minimize exposure. During bright days, sunglasses that offer UVA and UVB defense are recommended. Bear in mind! The Sun's UV radiation can nearly double in intensity due to the reflective quality of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Sun River Terrace, IL
- Average high temperature in December: 36.1°F
The warmest month (with the highest average high temperature) is July (81.1°F).
The month with the lowest average high temperature is January (30°F).
- Average low temperature in December: 25.7°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 (18.5°F).
Average pressure in December
Sun River Terrace, 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 (29.92"Hg).
Average wind speed in December
Sun River Terrace, IL
- Average wind speed in December: 9.5mph
The windiest month (with the highest average wind speed) is January (10.1mph).
The calmest months (with the lowest average wind speed) are July and August (6.2mph).
Average humidity in December
Sun River Terrace, IL
- Average humidity in December: 81%
The month with the highest relative humidity is July (84%).
The month with the lowest relative humidity is October (72%).
Average rainfall in December
Sun River Terrace, IL
- Average rainfall in December: 0.79"
The wettest month (with the highest rainfall) is May (2.2").
The driest month (with the least rainfall) is February (0.67").
Average rainfall days in December
Sun River Terrace, IL
- Average rainfall days in December: 7 days
The month with the highest number of rainy days is July (15.7 days).
The month with the least rainy days is February (5.1 days).
Average snowfall in December
Sun River Terrace, IL
- Average snowfall in December: 0.87"
The month with the highest snowfall is January (1.42").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in December
Sun River Terrace, IL
- Average snowfall days in December: 7.5 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
Sun River Terrace, 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, July and August (Average sunshine: 9h and 48min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days in December
Sun River Terrace, IL
- Average sunshine days in December: 17.9 days
The month with the most sunshine days is November (18.9 days).
The month with the least sunshine days is July (10.7 days).
Average UV index in December
Sun River Terrace, 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
Sun River Terrace, IL
- Average cloud cover in December: 57
The month with the most cloud cover is January (Cloud cover 60).
The month with the least cloud cover is August (Cloud cover 32).
Average visibility in December
Sun River Terrace, 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).
