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, shifting from a chilly 44.6°F (7°C) in November to an icy 32.5°F (0.3°C). Nighttime temperatures consistently average a subzero cold 22.5°F (-5.3°C) during December.Humidity
The average relative humidity in December is 83%.Rainfall
November and December are months with the least rain when the rain falls for 3.9 days and typically aggregates up to 0.31" (8mm) of rain.Snowfall
Months with snowfall are January through April, October through December. In Cherry Valley, during December, snow falls for 6.3 days and regularly aggregates up to 0.28" (7mm) of snow. In Cherry Valley, Illinois, during the entire year, snow falls for 29.5 days and aggregates up to 2.8" (71mm) of snow.Daylight
December has the shortest days of the year, with an average of 9h and 12min of daylight.On the first day of the month, sunrise is at 7:05 am and sunset at 4:24 pm. On the last day of December, sunrise is at 7:24 am and sunset at 4:33 pm CST.
Sunshine
The average sunshine in December is 3.9h.UV index
January, November and December, with an average maximum UV index of 1, are months with the lowest UV index. A UV Index of 2, and less, symbolizes a low threat to health from unsafe exposure to UV radiation for ordinary individuals.Note: In December, a daily UV index of 1 turns into the following recommendations:
Babies, children, and individuals with sensitive skin should always have protection against extended sun exposure. The Sun's radiation is especially intense around midday; try to stay in shade during this period. Employ a wide-brim hat for potent defense against up to 50% of UV rays. Warning! The reflection from snow can nearly magnify the Sun's UV radiation twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is it in December?
What is the average humidity in December?
What is the driest month?
How many days does it rain in December?
How much does it snow in December?
What is the month with the shortest days?
What is the average length of the day in December?
When is the sunrise / sunset in December?
How many hours of sunshine does Cherry Valley have in December?
What are the months with the lowest UV index?
What is the UV index reading in December?
Average temperature in December
Cherry Valley, IL
- Average high temperature in December: 32.5°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 (26.2°F).
- Average low temperature in December: 22.5°F
The month with the highest average low temperature is July (62.8°F).
The coldest month (with the lowest average low temperature) is January (14°F).
Average pressure in December
Cherry Valley, IL
- Average pressure in December: 30.09"Hg
The months with the highest atmospheric pressure are January and February (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in December
Cherry Valley, 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 (6.2mph).
Average humidity in December
Cherry Valley, IL
- Average humidity in December: 83%
The month with the highest relative humidity is January (86%).
The month with the lowest relative humidity is October (75%).
Average rainfall in December
Cherry Valley, IL
- Average rainfall in December: 0.31"
The wettest month (with the highest rainfall) is May (0.91").
The driest months (with the least rainfall) are November and December (0.31").
Average rainfall days in December
Cherry Valley, IL
- Average rainfall days in December: 3.9 days
The month with the highest number of rainy days is May (12.3 days).
The month with the least rainy days is January (3 days).
Average snowfall in December
Cherry Valley, IL
- Average snowfall in December: 0.28"
The month with the highest snowfall is January (1.02").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Cherry Valley, IL
- Average snowfall days in December: 6.3 days
The month with the highest number of snowfall days is January (8.2 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
Cherry Valley, 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 12min).
- Average sunshine in December: 3h and 5min
The month with the most sunshine is July (Average sunshine: 9h and 42min).
The month with the least sunshine is January (Average sunshine: 3h and 36min).
Average sunshine days in December
Cherry Valley, IL
- Average sunshine days in December: 22.9 days
The month with the most sunshine days is December (22.9 days).
The month with the least sunshine days is July (14.1 days).
Average UV index in December
Cherry Valley, IL
- Average UV index in December: 1
The months with the highest UV index are May, June, July and August (UV index 5).
The months with the lowest UV index are January, November and December (UV index 1).
Average cloud cover in December
Cherry Valley, IL
- Average cloud cover in December: 59
The month with the most cloud cover is January (Cloud cover 63).
The months with the least cloud cover are August and September (Cloud cover 34).
Average visibility in December
Cherry Valley, 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).
Cherry Valley, Illinois, USA
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