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
The onset of December introduces a moderate change in German Valley's weather, with average high-temperatures falling from November's frosty 44.6°F (7°C) to a cold 32.4°F (0.2°C). December's nights observe an average temperature of 22.3°F (-5.4°C).Humidity
In December, the average relative humidity in German Valley is 83%.Rainfall
February and December are months with the least rain when the rain falls for 7.5 days and typically aggregates up to 1.06" (27mm) of rain.Snowfall
Months with snowfall are January through April, October through December. In German Valley, Illinois, during December, snow falls for 9.9 days and regularly aggregates up to 2.09" (53mm) of snow. Throughout the year, in German Valley, there are 45.5 snowfall days, and 13.15" (334mm) of snow is accumulated.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 7:07 am and sunset at 4:26 pm. On the last day of December, sunrise is at 7:26 am and sunset at 4:35 pm CST.
Sunshine
In December, the average sunshine in German Valley is 4h.UV index
January and December, with an average maximum UV index of 1, are months with the lowest UV index in German Valley. A UV Index of 2, and less, symbolizes a minimal health vulnerability from unsafe exposure to UV radiation for the ordinary person.Note: In December, a daily UV index of 1 turns into the following recommendations:
Although prolonged sun exposure does not typically bother most people, children, babies, and those with sensitive skin should always have protection. Sun exposure should be minimized, especially during midday, to avoid harmful UV radiation. A hat with a broad brim is indispensable, filtering out up to half of UV rays. Be watchful! The reflection of snow can enhance the intensity of the Sun's UV radiation nearly double.
Frequently asked questions
How cold is December in German Valley?
What is the average humidity in December in German Valley?
What is the driest month in German Valley?
How many days does it rain in December in German Valley?
How much does it snow in German Valley in December?
What is the month with the shortest days in German Valley?
What is the average length of the day in December in German Valley?
When is the sunrise / sunset in December in German Valley?
How many hours of sunshine does German Valley have in December?
When is the lowest UV index in German Valley?
What is the UV index intensity in December in German Valley?
Average temperature in December
German Valley, IL
- Average high temperature in December: 32.4°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 (26.1°F).
- Average low temperature in December: 22.3°F
The month with the highest average low temperature is July (63.5°F).
The coldest month (with the lowest average low temperature) is January (13.5°F).
Average pressure in December
German Valley, 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 (29.91"Hg).
Average wind speed in December
German Valley, IL
- Average wind speed in December: 9.4mph
The windiest month (with the highest average wind speed) is April (10.3mph).
The calmest month (with the lowest average wind speed) is August (6.5mph).
Average humidity in December
German Valley, 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 (75%).
Average rainfall in December
German Valley, IL
- Average rainfall in December: 1.06"
The wettest month (with the highest rainfall) is June (3.39").
The driest months (with the least rainfall) are February and December (1.06").
Average rainfall days in December
German Valley, IL
- Average rainfall days in December: 7.5 days
The month with the highest number of rainy days is May (18.3 days).
The month with the least rainy days is February (5 days).
Average snowfall in December
German Valley, IL
- Average snowfall in December: 2.09"
The month with the highest snowfall is January (3.54").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
German Valley, IL
- Average snowfall days in December: 9.9 days
The month with the highest number of snowfall days is January (12.4 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
German 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: 4h and 0min
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
German Valley, IL
- Average sunshine days in December: 16.3 days
The month with the most sunshine days is November (17.2 days).
The month with the least sunshine days is June (9.7 days).
Average UV index in December
German 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 and December (UV index 1).
Average cloud cover in December
German Valley, IL
- Average cloud cover in December: 59
The month with the most cloud cover is January (Cloud cover 62).
The month with the least cloud cover is September (Cloud cover 33).
Average visibility in December
German Valley, IL
- Average visibility in December: 6mi
The months with the highest visibility are March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are January, February, July and August (5mi).
German Valley, Illinois, USA
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