December weather forecastBrill, WI
December
Weather in December
December, the first month of the winter in Brill, is still a freezing cold month, with temperature in the range of an average low of 12.9°F (-10.6°C) and an average high of 23.5°F (-4.7°C).Temperature
Brill's December weather features a mild decline in high-temperatures, reducing from a wintry 37.8°F (3.2°C) in November to a freezing cold 23.5°F (-4.7°C). An average low-temperature of 12.9°F (-10.6°C) is common in Brill during the nights of December.Humidity
The average relative humidity in December is 91%.Rainfall
In Brill, in December, during 4 rainfall days, 1.3" (33mm) of precipitation is typically accumulated. Throughout the year, there are 128.9 rainfall days, and 23.46" (596mm) of precipitation is accumulated.Snowfall
January through May, October through December are months with snowfall. In Brill, Wisconsin, during December, snow falls for 15.7 days and regularly aggregates up to 5.2" (132mm) of snow. In Brill, during the entire year, snow falls for 83.1 days and aggregates up to 28.98" (736mm) of snow.Daylight
With an average of 8h and 48min of daylight, December has the shortest days of the year.On the first day of December, sunrise is at 7:27 am and sunset at 4:24 pm. On the last day of the month, sunrise is at 7:47 am and sunset at 4:33 pm CST.
Sunshine
The average sunshine in December is 2.6h.UV index
January, November and December, with an average maximum UV index of 1, are months with the lowest UV index. A UV Index reading of 2, and below, represents a low health risk from exposure to the Sun's UV radiation for average individuals.Note: The UV index of 1 during December translates into the following guidance:
Prolonged exposure to sunlight rarely troubles the majority, but constant protection is vital for babies, children, and fair-skinned people. Limiting exposure to the direct Sun during midday hours can help prevent harmful UV radiation effects. Sunglasses that ward off UVA and UVB rays play a pivotal role in reducing solar eye damage. Be advised! The UV radiation from the Sun can be almost doubled due to the reflective properties of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Brill, WI
- Average high temperature in December: 23.5°F
The warmest month (with the highest average high temperature) is July (78.4°F).
The month with the lowest average high temperature is January (17.6°F).
- Average low temperature in December: 12.9°F
The month with the highest average low temperature is July (58.6°F).
The coldest month (with the lowest average low temperature) is January (5°F).
Average pressure in December
Brill, WI
- Average pressure in December: 30.09"Hg
The month with the highest atmospheric pressure is February (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.89"Hg).
Average wind speed in December
Brill, WI
- Average wind speed in December: 8.5mph
The windiest month (with the highest average wind speed) is April (9.1mph).
The calmest months (with the lowest average wind speed) are July and August (6.8mph).
Average humidity in December
Brill, WI
- Average humidity in December: 91%
The month with the highest relative humidity is January (93%).
The month with the lowest relative humidity is May (76%).
Average rainfall in December
Brill, WI
- Average rainfall in December: 1.3"
The wettest month (with the highest rainfall) is June (3.5").
The driest month (with the least rainfall) is January (0.79").
Average rainfall days in December
Brill, WI
- Average rainfall days in December: 4 days
The month with the highest number of rainy days is June (18.2 days).
The month with the least rainy days is February (2.5 days).
Average snowfall in December
Brill, WI
- Average snowfall in December: 5.2"
The month with the highest snowfall is February (5.59").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Brill, WI
- Average snowfall days in December: 15.7 days
The month with the highest number of snowfall days is January (18.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Brill, WI
- Average daylight in December: 8h and 48min
The month with the longest days is June (Average daylight: 15h and 36min).
The month with the shortest days is December (Average daylight: 8h and 48min).
- Average sunshine in December: 2h and 36min
The month with the most sunshine is July (Average sunshine: 9h and 36min).
The month with the least sunshine is January (Average sunshine: 2h and 30min).
Average sunshine days in December
Brill, WI
- Average sunshine days in December: 14.4 days
The month with the most sunshine days is September (15.4 days).
The month with the least sunshine days is June (9.7 days).
Average UV index in December
Brill, WI
- Average UV index in December: 1
The months with the highest UV index are May, June and July (UV index 5).
The months with the lowest UV index are January, November and December (UV index 1).
Average cloud cover in December
Brill, WI
- Average cloud cover in December: 73
The months with the most cloud cover are January and February (Cloud cover 75).
The month with the least cloud cover is July (Cloud cover 37).
Average visibility in December
Brill, WI
- Average visibility in December: 4mi
The months with the highest visibility are May and June (6mi).
The months with the lowest visibility are January, February and December (4mi).
