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
Welcoming December, Brown Deer observes a shift in the average high-temperature, falling from November's frosty 43.7°F (6.5°C) to an icy 32.9°F (0.5°C). Brown Deer observes a minimal variance in temperature, with a consistent average low of 25°F (-3.9°C) during the nights of December.Humidity
The average relative humidity in December is 81%.Rainfall
The month with the least rainfall is December, when the rain falls for 5.5 days and typically collects 0.71" (18mm) of precipitation.Snowfall
Months with snowfall are January through April, October through December. In Brown Deer, in December, snow falls for 7.7 days, with typically accumulated 1.3" (33mm) of snow. In Brown Deer, Wisconsin, during the entire year, snow falls for 42.5 days and aggregates up to 8.23" (209mm) of snow.Daylight
With an average of 9h and 6min of daylight, December has the shortest days of the year.On the first day of the month, sunrise is at 7:04 am and sunset at 4:17 pm. On the last day of December, sunrise is at 7:23 am and sunset at 4:26 pm CST.
Sunshine
The average sunshine in December is 4h.UV index
January and December, with an average maximum UV index of 1, are months with the lowest UV index. A UV Index value of 2, and less, symbolizes a low threat to health from unsafe exposure to UV radiation for the ordinary person.Note: An average maximum UV index of 1 in December leads to these recommendations:
Unlike children, who always need sun protection, most individuals can remain in the sun for up to an hour without getting burnt. When the Sun is at its strongest around midday, find shade and limit exposure. Sunglasses that guard against UVA and UVB rays are pivotal in minimizing sun-induced ocular damage. On your guard! Snow's reflection can almost double the intensity of the Sun's UV radiation.
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Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is December?
What is the average humidity in December in Brown Deer?
What is the driest month?
How much does it rain in December?
How many days does it snow in December?
What is the month with the shortest days?
What is the average length of the day in December?
What time are sunrise and sunset in December?
How long on average sun shines in December?
What are the months with the lowest UV index in Brown Deer?
What is the UV index reading in December?
Average temperature in December
Brown Deer, WI
- Average high temperature in December: 32.9°F
The warmest month (with the highest average high temperature) is July (75.7°F).
The month with the lowest average high temperature is January (26.8°F).
- Average low temperature in December: 25°F
The month with the highest average low temperature is July (64.8°F).
The coldest month (with the lowest average low temperature) is January (17.1°F).
Average pressure in December
Brown Deer, WI
- Average pressure in December: 30.08"Hg
The months with the highest atmospheric pressure are January, February and March (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in December
Brown Deer, WI
- Average wind speed in December: 11.8mph
The windiest month (with the highest average wind speed) is January (12.6mph).
The calmest month (with the lowest average wind speed) is July (7.7mph).
Average humidity in December
Brown Deer, WI
- Average humidity in December: 81%
The month with the highest relative humidity is January (85%).
The month with the lowest relative humidity is October (75%).
Average rainfall in December
Brown Deer, WI
- Average rainfall in December: 0.71"
The wettest month (with the highest rainfall) is July (2.56").
The driest month (with the least rainfall) is December (0.71").
Average rainfall days in December
Brown Deer, WI
- Average rainfall days in December: 5.5 days
The months with the highest number of rainy days are May, June and July (15.2 days).
The month with the least rainy days is February (4.5 days).
Average snowfall in December
Brown Deer, WI
- Average snowfall in December: 1.3"
The month with the highest snowfall is January (2.17").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Brown Deer, WI
- Average snowfall days in December: 7.7 days
The month with the highest number of snowfall days is January (12.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Brown Deer, WI
- Average daylight in December: 9h and 1min
The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 6min).
- Average sunshine in December: 4h and 0min
The months with the most sunshine are July and August (Average sunshine: 10h and 36min).
The month with the least sunshine is January (Average sunshine: 3h and 36min).
Average sunshine days in December
Brown Deer, WI
- Average sunshine days in December: 18.2 days
The month with the most sunshine days is December (18.2 days).
The month with the least sunshine days is June (12.3 days).
Average UV index in December
Brown Deer, WI
- Average UV index in December: 1
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in December
Brown Deer, WI
- 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 July (Cloud cover 26).
Average visibility in December
Brown Deer, WI
- 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).
Brown Deer, Wisconsin, USA
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