December weather forecastRoyalton, WI
December
Weather in December
The first month of the winter, December, is also a subzero cold month in Royalton, Wisconsin, with an average temperature varying between 18.5°F (-7.5°C) and 27.9°F (-2.3°C).Temperature
The shift from November to December corresponds with a decrease in the average high-temperature, down to a freezing cold 27.9°F (-2.3°C) from an icy 41.4°F (5.2°C). During the nights in December, an average low-temperature of 18.5°F (-7.5°C) is observed.Humidity
The average relative humidity in December in Royalton is 86%.Rainfall
In Royalton, in December, it is raining for 5.7 days, with typically 1.69" (43mm) of accumulated precipitation. Throughout the year, there are 132 rainfall days, and 25.79" (655mm) of precipitation is accumulated.Snowfall
Months with snowfall in Royalton are January through May, October through December. In Royalton, in December, during 13 snowfall days, 4.53" (115mm) of snow is typically accumulated. In Royalton, during the entire year, snow falls for 57.1 days and aggregates up to 24.8" (630mm) of snow.Daylight
With an average of 8h and 54min of daylight, December has the shortest days of the year.On the first day of December, sunrise is at 7:12 am and sunset at 4:17 pm. On the last day of the month, sunrise is at 7:31 am and sunset at 4:26 pm CST.
Sunshine
In Royalton, 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 in Royalton. A UV Index value of 2, and less, symbolizes a low threat to health from unprotected exposure to Sun's UV rays for the average person.Note: A maximum UV index of 1 in December translates into the following recommendations:
Long-term sun exposure is typically not a concern for most. However, those with sensitive skin, infants, and children must always have protection. Direct Sun exposure should be minimized especially during midday when radiation is most intense. Protect your eyes, ears, face, and neck from the Sun by wearing a wide-brimmed hat. 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
Royalton, WI
- Average high temperature in December: 27.9°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 (21.9°F).
- Average low temperature in December: 18.5°F
The month with the highest average low temperature is July (60.4°F).
The coldest month (with the lowest average low temperature) is January (10.6°F).
Average pressure in December
Royalton, WI
- Average pressure in December: 30.08"Hg
The months with the highest atmospheric pressure are January, February and March (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in December
Royalton, WI
- Average wind speed in December: 9.3mph
The windiest month (with the highest average wind speed) is April (9.8mph).
The calmest month (with the lowest average wind speed) is August (7mph).
Average humidity in December
Royalton, WI
- Average humidity in December: 86%
The month with the highest relative humidity is January (89%).
The month with the lowest relative humidity is April (76%).
Average rainfall in December
Royalton, WI
- Average rainfall in December: 1.69"
The wettest month (with the highest rainfall) is May (3.66").
The driest month (with the least rainfall) is January (1.18").
Average rainfall days in December
Royalton, WI
- Average rainfall days in December: 5.7 days
The month with the highest number of rainy days is May (16.3 days).
The month with the least rainy days is January (4 days).
Average snowfall in December
Royalton, WI
- Average snowfall in December: 4.53"
The month with the highest snowfall is January (6.06").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Royalton, WI
- Average snowfall days in December: 13 days
The month with the highest number of snowfall days is December (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
Royalton, WI
- Average daylight in December: 8h and 54min
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 42min
The month with the most sunshine is July (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 3h and 30min).
Average sunshine days in December
Royalton, WI
- Average sunshine days in December: 15.3 days
The month with the most sunshine days is November (16.7 days).
The month with the least sunshine days is April (11.7 days).
Average UV index in December
Royalton, WI
- Average UV index in December: 1
The months with the highest UV index are May, 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
Royalton, WI
- Average cloud cover in December: 62
The month with the most cloud cover is January (Cloud cover 63).
The month with the least cloud cover is July (Cloud cover 33).
Average visibility in December
Royalton, 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).
