December weather forecastShady Grove, IL
December
Weather in December
The first month of the winter, December, is also a frosty month in Shady Grove, Illinois, with an average temperature fluctuating between 46.2°F (7.9°C) and 34.2°F (1.2°C).Temperature
December implies a gentle temperature shift, with average high-temperatures reducing from November's refreshing 55.6°F (13.1°C) to a frosty 46.2°F (7.9°C). Shady Grove, in December, witnesses an average low-temperature of 34.2°F (1.2°C).Humidity
In December, the average relative humidity is 78%.Rainfall
In Shady Grove, in December, it is raining for 9 days, with typically 1.14" (29mm) of accumulated precipitation. In Shady Grove, during the entire year, the rain falls for 126.4 days and collects up to 16.89" (429mm) of precipitation.Snowfall
January through March, November and December are months with snowfall in Shady Grove. In Shady Grove, in December, during 1.4 snowfall days, 0.08" (2mm) of snow is typically accumulated. In Shady Grove, during the entire year, snow falls for 8.9 days and aggregates up to 1.65" (42mm) of snow.Daylight
The month with the shortest days is December, with an average of 9h and 42min of daylight.On the first day of the month, sunrise is at 6:49 am and sunset at 4:37 pm. On the last day of December, sunrise is at 7:07 am and sunset at 4:47 pm CST.
Sunshine
In Shady Grove, the average sunshine in December is 4.9h.UV index
The months with the lowest UV index are January and December, with an average maximum UV index of 2. A UV Index of 2, and less, symbolizes a low threat to health from unprotected exposure to Sun's UV rays for the average person.Note: The UV index of 2 during December leads to these advisories:
Sun exposure does not present considerable issues for many, yet infants, fair-skinned people, and children necessitate constant protection. Considering the Sun's intensity during midday, it's wise to minimize direct exposure. Prioritize a wide-brim hat for comprehensive sun defense for your face, neck, eyes, and ears. Take precaution! The reflection from snow can almost double the UV radiation of the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Shady Grove, IL
- Average high temperature in December: 46.2°F
The warmest month (with the highest average high temperature) is July (88.7°F).
The month with the lowest average high temperature is January (41.5°F).
- Average low temperature in December: 34.2°F
The month with the highest average low temperature is July (69.4°F).
The coldest month (with the lowest average low temperature) is January (28.6°F).
Average pressure in December
Shady Grove, IL
- Average pressure in December: 30.14"Hg
The month with the highest atmospheric pressure is January (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.95"Hg).
Average wind speed in December
Shady Grove, IL
- Average wind speed in December: 8.5mph
The windiest month (with the highest average wind speed) is April (9mph).
The calmest months (with the lowest average wind speed) are July and August (5.7mph).
Average humidity in December
Shady Grove, IL
- Average humidity in December: 78%
The months with the highest relative humidity are March and May (79%).
The month with the lowest relative humidity is October (70%).
Average rainfall in December
Shady Grove, IL
- Average rainfall in December: 1.14"
The wettest month (with the highest rainfall) is May (1.93").
The driest month (with the least rainfall) is September (0.63").
Average rainfall days in December
Shady Grove, IL
- Average rainfall days in December: 9 days
The month with the highest number of rainy days is May (14.7 days).
The month with the least rainy days is October (7.6 days).
Average snowfall in December
Shady Grove, IL
- Average snowfall in December: 0.08"
The month with the highest snowfall is February (0.71").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in December
Shady Grove, IL
- Average snowfall days in December: 1.4 days
The month with the highest number of snowfall days is February (3.3 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in December /
Average sunshine in December
Shady Grove, IL
- Average daylight in December: 9h and 42min
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 42min).
- Average sunshine in December: 4h and 54min
The months with the most sunshine are June and July (Average sunshine: 10h and 30min).
The month with the least sunshine is February (Average sunshine: 4h and 36min).
Average sunshine days in December
Shady Grove, IL
- Average sunshine days in December: 20 days
The month with the most sunshine days is October (22.3 days).
The month with the least sunshine days is July (14.2 days).
Average UV index in December
Shady Grove, 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 and December (UV index 2).
Average cloud cover in December
Shady Grove, 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 and September (Cloud cover 28).
Average visibility in December
Shady Grove, 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).
