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 drop in Brillion's average high-temperature, falling from an icy 41.9°F (5.5°C) in November to a freezing cold 29.3°F (-1.5°C). Brillion's average low-temperature in December is measured at a still subzero cold 20.1°F (-6.6°C).Humidity
In December, the average relative humidity is 85%.Rainfall
In Brillion, in December, it is raining for 6 days, with typically 0.94" (24mm) of accumulated precipitation. In Brillion, during the entire year, the rain falls for 125 days and collects up to 18.07" (459mm) of precipitation.Snowfall
January through May, October through December are months with snowfall. In Brillion, during December, snow falls for 11.7 days and regularly aggregates up to 2.6" (66mm) of snow. Throughout the year, there are 55.7 snowfall days, and 13.39" (340mm) of snow is accumulated.Daylight
December has the shortest days of the year, with an average of 8h and 54min of daylight.On the first day of the month, sunrise is at 7:08 am and sunset at 4:14 pm. On the last day of December, in Brillion, sunrise is at 7:27 am and sunset at 4:23 pm CST.
Sunshine
The average sunshine in December is 3.7h.UV index
January, November and December, with an average maximum UV index of 1, are months with the lowest UV index. A UV Index estimate of 2, and below, represents a low health risk from unsafe exposure to UV radiation for the ordinary person.Note: The UV index of 1 during December leads to these advisories:
Extended sun exposure is not an issue for the majority. Children, infants, and fair-skinned individuals always need to be protected. Avoiding the Sun's peak radiation during midday hours is essential for health and safety. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses. Forewarned is forearmed! The Sun's UV radiation can be almost doubled in intensity by snow reflection.
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?
How much does it rain in December?
How many days does it snow in December in Brillion?
What is the month with the shortest days?
What is the average length of the day in December in Brillion?
When are sunrise and sunset in December?
How many hours of sunshine does Brillion have in December?
What are the months with the lowest UV index?
How high is the UV index in December?
Average temperature in December
Brillion, WI
- Average high temperature in December: 29.3°F
The warmest month (with the highest average high temperature) is July (78.3°F).
The month with the lowest average high temperature is January (23.2°F).
- Average low temperature in December: 20.1°F
The month with the highest average low temperature is July (61°F).
The coldest month (with the lowest average low temperature) is January (12°F).
Average pressure in December
Brillion, WI
- Average pressure in December: 30.07"Hg
The months with the highest atmospheric pressure are February and March (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in December
Brillion, WI
- Average wind speed in December: 10.1mph
The windiest months (with the highest average wind speed) are January and February (10.3mph).
The calmest months (with the lowest average wind speed) are July and August (7.1mph).
Average humidity in December
Brillion, WI
- Average humidity in December: 85%
The months with the highest relative humidity are January and February (88%).
The month with the lowest relative humidity is April (76%).
Average rainfall in December
Brillion, WI
- Average rainfall in December: 0.94"
The wettest month (with the highest rainfall) is May (2.48").
The driest month (with the least rainfall) is February (0.79").
Average rainfall days in December
Brillion, WI
- Average rainfall days in December: 6 days
The month with the highest number of rainy days is July (14.9 days).
The month with the least rainy days is January (3.8 days).
Average snowfall in December
Brillion, WI
- Average snowfall in December: 2.6"
The month with the highest snowfall is January (3.35").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Brillion, WI
- Average snowfall days in December: 11.7 days
The month with the highest number of snowfall days is February (13.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Brillion, WI
- Average daylight in December: 8h and 5min
The month with the longest days is June (Average daylight: 15h and 30min).
The month with the shortest days is December (Average daylight: 8h and 54min).
- Average sunshine in December: 3h and 4min
The month with the most sunshine is July (Average sunshine: 10h and 18min).
The month with the least sunshine is February (Average sunshine: 3h and 24min).
Average sunshine days in December
Brillion, WI
- Average sunshine days in December: 16.6 days
The month with the most sunshine days is November (17.2 days).
The month with the least sunshine days is July (12.6 days).
Average UV index in December
Brillion, WI
- Average UV index in December: 1
The months with the highest UV index are 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
Brillion, WI
- Average cloud cover in December: 63
The month with the most cloud cover is January (Cloud cover 64).
The month with the least cloud cover is July (Cloud cover 31).
Average visibility in December
Brillion, WI
- Average visibility in December: 6mi
The months with the highest visibility are March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January and February (5mi).
Brillion, Wisconsin, USA
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