December weather forecastRoss, WI
December
Weather in December
The first month of the winter, December, is still a freezing cold month in Ross, Wisconsin, with an average temperature fluctuating between 28°F (-2.2°C) and 17.4°F (-8.1°C).Temperature
The shift from November to December corresponds with a decrease in the average high-temperature, down to a freezing cold 28°F (-2.2°C) from an icy 41.9°F (5.5°C). In December, the nighttime temperature in Ross lowers to an average of 17.4°F (-8.1°C).Humidity
The average relative humidity in December is 87%.Rainfall
In Ross, in December, during 5.1 rainfall days, 1.57" (40mm) of precipitation is typically accumulated. Throughout the year, there are 130.6 rainfall days, and 28.58" (726mm) of precipitation is accumulated.Snowfall
Months with snowfall in Ross, Wisconsin, are January through May, October through December. In December, it is snowing for 10.8 days. Throughout December, 4.29" (109mm) of snow is accumulated. In Ross, during the entire year, snow falls for 54.2 days and aggregates up to 24.65" (626mm) of snow.Daylight
With an average of 9h and 0min of daylight, December has the shortest days of the year.On the first day of the month, sunrise is at 7:16 am and sunset at 4:27 pm. On the last day of December, in Ross, sunrise is at 7:36 am and sunset at 4:36 pm CST.
Sunshine
The average sunshine in December is 3.5h.UV index
January, February, November and December, with an average maximum UV index of 1, are months with the lowest UV index in Ross. 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: In December, the maximum UV index of 1 suggests these recommendations:
Prolonged sun exposure should always be prevented in babies, children, and those with sensitive skin. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. It's wise to wear UVA and UVB-blocking sunglasses when the sun shines brightly. 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
Ross, WI
- Average high temperature in December: 28°F
The warmest month (with the highest average high temperature) is July (79.7°F).
The month with the lowest average high temperature is January (22.1°F).
- Average low temperature in December: 17.4°F
The month with the highest average low temperature is July (61.2°F).
The coldest month (with the lowest average low temperature) is January (9.3°F).
Average pressure in December
Ross, WI
- Average pressure in December: 30.1"Hg
The months with the highest atmospheric pressure are January and February (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).
Average wind speed in December
Ross, WI
- Average wind speed in December: 8.8mph
The windiest month (with the highest average wind speed) is April (9.3mph).
The calmest month (with the lowest average wind speed) is August (6.3mph).
Average humidity in December
Ross, WI
- Average humidity in December: 87%
The month with the highest relative humidity is January (91%).
The month with the lowest relative humidity is April (77%).
Average rainfall in December
Ross, WI
- Average rainfall in December: 1.57"
The wettest month (with the highest rainfall) is June (4.8").
The driest month (with the least rainfall) is January (1.1").
Average rainfall days in December
Ross, WI
- Average rainfall days in December: 5.1 days
The month with the highest number of rainy days is May (18.4 days).
The month with the least rainy days is February (3.1 days).
Average snowfall in December
Ross, WI
- Average snowfall in December: 4.29"
The month with the highest snowfall is February (6.38").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Ross, WI
- Average snowfall days in December: 10.8 days
The month with the highest number of snowfall days is January (13 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Ross, WI
- Average daylight in December: 9h and 0min
The month with the longest days is June (Average daylight: 15h and 24min).
The month with the shortest days is December (Average daylight: 9h and 0min).
- Average sunshine in December: 3h and 30min
The months with the most sunshine are July and August (Average sunshine: 9h and 42min).
The month with the least sunshine is January (Average sunshine: 3h and 6min).
Average sunshine days in December
Ross, WI
- Average sunshine days in December: 17.4 days
The month with the most sunshine days is December (17.4 days).
The month with the least sunshine days is June (9.8 days).
Average UV index in December
Ross, 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, February, November and December (UV index 1).
Average cloud cover in December
Ross, WI
- Average cloud cover in December: 64
The month with the most cloud cover is January (Cloud cover 68).
The month with the least cloud cover is August (Cloud cover 33).
Average visibility in December
Ross, WI
- Average visibility in December: 5mi
The months with the highest visibility are April, May, October and November (6mi).
The month with the lowest visibility is January (4mi).
