December weather forecastRoberts, WI
December
Weather in December
The first month of the winter, December, is also a subzero cold month in Roberts, Wisconsin, with an average temperature varying between 14.5°F (-9.7°C) and 24.6°F (-4.1°C).Temperature
December's arrival signals a distinct temperature shift, dropping from an icy 40.1°F (4.5°C) in November to a subzero cold 24.6°F (-4.1°C). An average temperature of 14.5°F (-9.7°C) marks the nights in Roberts, Wisconsin, in December.Humidity
In Roberts, the average relative humidity in December is 89%.Rainfall
In Roberts, in December, during 4.7 rainfall days, 1.3" (33mm) of precipitation is typically accumulated. Throughout the year, in Roberts, there are 130.4 rainfall days, and 24.29" (617mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through May, October through December. In Roberts, Wisconsin, during December, snow falls for 13.4 days and regularly aggregates up to 4.45" (113mm) of snow. Throughout the year, there are 67.4 snowfall days, and 22.4" (569mm) of snow is accumulated.Daylight
December has the shortest days of the year in Roberts, with an average of 8h and 48min of daylight.On the first day of December in Roberts, sunrise is at 7:28 am and sunset at 4:30 pm. On the last day of the month, sunrise is at 7:48 am and sunset at 4:38 pm CST.
Sunshine
In Roberts, the average sunshine in December is 3.3h.UV index
The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 1. A UV Index reading of 2, and below, represents a minimal health vulnerability from exposure to the Sun's UV radiation for the average person.Note: The UV index of 1 during December leads to these advisories:
Though extended exposure to the sun typically does not concern most people, it is crucial to always shield children, infants, and those with sensitive skin. For health reasons, it's advisable to reduce direct sun exposure during peak hours around midday. Counter UV radiation's ill effects with clothing designed for sun safety and UV-resistant eyewear. Be watchful! The reflection of snow can enhance the intensity of the Sun's UV radiation nearly double.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Roberts, WI
- Average high temperature in December: 24.6°F
The warmest month (with the highest average high temperature) is July (79.3°F).
The month with the lowest average high temperature is January (19.4°F).
- Average low temperature in December: 14.5°F
The month with the highest average low temperature is July (61.3°F).
The coldest month (with the lowest average low temperature) is January (6.3°F).
Average pressure in December
Roberts, WI
- Average pressure in December: 30.1"Hg
The months with the highest atmospheric pressure are January and February (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).
Average wind speed in December
Roberts, WI
- Average wind speed in December: 8.4mph
The windiest month (with the highest average wind speed) is April (9.4mph).
The calmest month (with the lowest average wind speed) is July (6.7mph).
Average humidity in December
Roberts, WI
- Average humidity in December: 89%
The month with the highest relative humidity is January (91%).
The month with the lowest relative humidity is April (74%).
Average rainfall in December
Roberts, WI
- Average rainfall in December: 1.3"
The wettest month (with the highest rainfall) is June (4.13").
The driest month (with the least rainfall) is January (0.75").
Average rainfall days in December
Roberts, WI
- Average rainfall days in December: 4.7 days
The month with the highest number of rainy days is June (17.8 days).
The month with the least rainy days is January (2.8 days).
Average snowfall in December
Roberts, WI
- Average snowfall in December: 4.45"
The month with the highest snowfall is February (5.67").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Roberts, WI
- Average snowfall days in December: 13.4 days
The month with the highest number of snowfall days is January (16.4 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Roberts, 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 18min
The month with the most sunshine is July (Average sunshine: 9h and 42min).
The month with the least sunshine is January (Average sunshine: 2h and 54min).
Average sunshine days in December
Roberts, WI
- Average sunshine days in December: 15.3 days
The month with the most sunshine days is November (16.2 days).
The month with the least sunshine days is June (9.6 days).
Average UV index in December
Roberts, 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
Roberts, WI
- Average cloud cover in December: 67
The month with the most cloud cover is January (Cloud cover 70).
The months with the least cloud cover are July and August (Cloud cover 33).
Average visibility in December
Roberts, WI
- Average visibility in December: 5mi
The months with the highest visibility are April, May, June, July, August, September, October and November (6mi).
The month with the lowest visibility is January (4mi).
