December weather forecastSister Bay, WI
December
Weather in December
The first month of the winter, December, is also a subzero cold month in Sister Bay, Wisconsin, with temperature in the range of an average low of 25.5°F (-3.6°C) and an average high of 31.1°F (-0.5°C).Temperature
As Sister Bay enters December, the average high-temperature decreases from the a wintry 41.7°F (5.4°C) of November to a subzero cold 31.1°F (-0.5°C). Sister Bay, in December, logs an average low-temperature of 25.5°F (-3.6°C), a subtle step down from daytime readings.Humidity
In December, the average relative humidity is 81%.Rainfall
In Sister Bay, in December, it is raining for 7.5 days, with typically 2.09" (53mm) of accumulated precipitation. Throughout the year, there are 141.7 rainfall days, and 26.93" (684mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through May, October through December. In Sister Bay, in December, snow falls for 12.4 days, with typically accumulated 2.99" (76mm) of snow. Throughout the year, there are 62.3 snowfall days, and 15.83" (402mm) of snow is accumulated.Daylight
December has the shortest days of the year in Sister Bay, with an average of 8h and 48min of daylight.On the first day of December in Sister Bay, sunrise is at 7:07 am and sunset at 4:07 pm. On the last day of the month, sunrise is at 7:27 am and sunset at 4:16 pm CST.
Sunshine
The average sunshine in December is 3.2h.UV index
January, March and December, with an average maximum UV index of 1, are months with the lowest UV index in Sister Bay, Wisconsin. 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 average daily UV index of 1 in December transforms into the following instructions:
While sun exposure does not greatly affect most, individuals with fair skin, babies, and children always need vigilant safeguarding. When the Sun's UV radiation is most intense during midday, it's best to find shade and limit exposure. It's wise to wear UVA and UVB-blocking sunglasses when the sun shines brightly. Guard yourself! Snow reflection can almost double the UV radiation from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Sister Bay, WI
- Average high temperature in December: 31.1°F
The warmest month (with the highest average high temperature) is August (69.6°F).
The month with the lowest average high temperature is January (25.2°F).
- Average low temperature in December: 25.5°F
The month with the highest average low temperature is August (63°F).
The coldest month (with the lowest average low temperature) is January (18.1°F).
Average pressure in December
Sister Bay, WI
- Average pressure in December: 30.04"Hg
The month with the highest atmospheric pressure is March (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in December
Sister Bay, WI
- Average wind speed in December: 15.5mph
The windiest month (with the highest average wind speed) is December (15.5mph).
The calmest months (with the lowest average wind speed) are June and July (9.6mph).
Average humidity in December
Sister Bay, WI
- Average humidity in December: 81%
The months with the highest relative humidity are January and June (84%).
The month with the lowest relative humidity is November (76%).
Average rainfall in December
Sister Bay, WI
- Average rainfall in December: 2.09"
The wettest month (with the highest rainfall) is October (3.07").
The driest months (with the least rainfall) are January and February (1.38").
Average rainfall days in December
Sister Bay, WI
- Average rainfall days in December: 7.5 days
The month with the highest number of rainy days is August (15.6 days).
The month with the least rainy days is February (4.8 days).
Average snowfall in December
Sister Bay, WI
- Average snowfall in December: 2.99"
The month with the highest snowfall is February (4.49").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Sister Bay, WI
- Average snowfall days in December: 12.4 days
The month with the highest number of snowfall days is January (14.6 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Sister Bay, 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: 3h and 12min
The month with the most sunshine is July (Average sunshine: 10h and 36min).
The month with the least sunshine is January (Average sunshine: 3h and 6min).
Average sunshine days in December
Sister Bay, WI
- Average sunshine days in December: 10.3 days
The month with the most sunshine days is September (15.1 days).
The month with the least sunshine days is January (8.3 days).
Average UV index in December
Sister Bay, WI
- Average UV index in December: 1
The months with the highest UV index are July and August (UV index 5).
The months with the lowest UV index are January, March and December (UV index 1).
Average cloud cover in December
Sister Bay, WI
- Average cloud cover in December: 67
The month with the most cloud cover is January (Cloud cover 68).
The months with the least cloud cover are July and August (Cloud cover 28).
Average visibility in December
Sister Bay, WI
- Average visibility in December: 5mi
The months with the highest visibility are March, April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January, February and December (5mi).
