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
A shift in the average high-temperature occurs in December, reducing from a chilly 47.7°F (8.7°C) in November to a cold 36.1°F (2.3°C). Throughout the month of December, the nighttime temperature dips to an average of 25.7°F (-3.5°C).Humidity
The average relative humidity in December is 81%.Rainfall
In December, the rain falls for 6 days. Throughout December, 0.71" (18mm) of precipitation is accumulated. In Germantown Hills, during the entire year, the rain falls for 119 days and collects up to 13.11" (333mm) of precipitation.Snowfall
Months with snowfall are January through April, October through December. In Germantown Hills, Illinois, in December, snow falls for 6.4 days, with typically accumulated 0.63" (16mm) of snow. In Germantown Hills, during the entire year, snow falls for 29.9 days and aggregates up to 5.55" (141mm) of snow.Daylight
With an average of 9h and 18min of daylight, December has the shortest days of the year.On the first day of December in Germantown Hills, Illinois, sunrise is at 7:03 am and sunset at 4:30 pm. On the last day of the month, sunrise is at 7:21 am and sunset at 4:40 pm CST.
Sunshine
The average sunshine in December in Germantown Hills, Illinois, is 4.3h.UV index
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Germantown Hills. A UV Index value of 2, and less, symbolizes a minimal health vulnerability from exposure to the Sun's UV rays for average individuals.Note: In December, the maximum UV index of 2 translates into these guidelines:
Protection from prolonged sun exposure is necessary for babies, children, and individuals with sensitive skin. UV radiation is strongest from the Sun during midday; protect yourself by staying in shaded areas. Stay sun-safe with clothing that is both closely woven and worn loosely. Take note! UV radiation from the Sun can double in intensity due to snow reflection.
Frequently asked questions
How cold is December in Germantown Hills?
What is the average humidity in December in Germantown Hills?
How much does it rain in Germantown Hills in December?
How many days does it snow in December in Germantown Hills?
What is the month with the shortest days in Germantown Hills?
What is the average length of the day in December in Germantown Hills?
When is the sunrise / sunset in December in Germantown Hills?
How long on average sun shines in December in Germantown Hills?
When is the lowest UV index in Germantown Hills?
What is the UV index intensity in December in Germantown Hills?
Average temperature in December
Germantown Hills, IL
- Average high temperature in December: 36.1°F
The warmest month (with the highest average high temperature) is July (81.3°F).
The month with the lowest average high temperature is January (30.2°F).
- Average low temperature in December: 25.7°F
The month with the highest average low temperature is July (64.9°F).
The coldest month (with the lowest average low temperature) is January (18.5°F).
Average pressure in December
Germantown Hills, IL
- Average pressure in December: 30.11"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in December
Germantown Hills, IL
- Average wind speed in December: 9.9mph
The windiest month (with the highest average wind speed) is April (10.6mph).
The calmest month (with the lowest average wind speed) is August (6.5mph).
Average humidity in December
Germantown Hills, 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
Germantown Hills, IL
- Average rainfall in December: 0.71"
The wettest month (with the highest rainfall) is May (1.69").
The driest month (with the least rainfall) is February (0.63").
Average rainfall days in December
Germantown Hills, IL
- Average rainfall days in December: 6 days
The month with the highest number of rainy days is May (14.3 days).
The month with the least rainy days is January (4.2 days).
Average snowfall in December
Germantown Hills, IL
- Average snowfall in December: 0.63"
The month with the highest snowfall is January (1.46").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Germantown Hills, IL
- Average snowfall days in December: 6.4 days
The month with the highest number of snowfall days is January (10 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
Germantown Hills, IL
- Average daylight in December: 9h and 2min
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 2min
The month with the most sunshine is June (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 3h and 54min).
Average sunshine days in December
Germantown Hills, IL
- Average sunshine days in December: 20.6 days
The month with the most sunshine days is December (20.6 days).
The month with the least sunshine days is July (11.6 days).
Average UV index in December
Germantown Hills, IL
- Average UV index in December: 2
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in December
Germantown Hills, IL
- Average cloud cover in December: 53
The month with the most cloud cover is January (Cloud cover 58).
The month with the least cloud cover is September (Cloud cover 30).
Average visibility in December
Germantown Hills, 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).
Germantown Hills, Illinois, USA
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