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
As Rio enters December, the average high-temperature decreases from the a cold 41.9°F (5.5°C) of November to a freezing cold 29.1°F (-1.6°C). Throughout the month of December, Rio witnesses an average temperature of 19.2°F (-7.1°C).Humidity
In December, the average relative humidity in Rio is 85%.Rainfall
In Rio, in December, during 6.1 rainfall days, 1.3" (33mm) of precipitation is typically accumulated. Throughout the year, in Rio, there are 134.5 rainfall days, and 26.97" (685mm) of precipitation is accumulated.Snowfall
January through May, October through December are months with snowfall. In December, it is snowing for 11.5 days. Throughout December, 3.31" (84mm) of snow is accumulated. Throughout the year, in Rio, there are 54.7 snowfall days, and 19.06" (484mm) of snow is accumulated.Daylight
The month with the shortest days in Rio is December, with an average of 9h and 0min of daylight.On the first day of the month, sunrise is at 7:10 am and sunset at 4:21 pm. On the last day of December, sunrise is at 7:29 am and sunset at 4:30 pm CST.
Sunshine
In Rio, 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 threat to health from unprotected exposure to Sun's UV rays for ordinary individuals.Note: During December, 1 as the daily maximum UV index converts into the following advice:
Extended sun exposure is not an issue for the majority. Children, infants, and fair-skinned individuals always need to be protected. The Sun is most powerful around mid-day, so it's a good practice to reduce direct exposure. Enhance your sun protection with tightly woven, yet airy clothing. Be attentive! The reflective property of snow can nearly double the Sun's UV radiation.
Frequently asked questions
How cold is December in Rio?
What is the average humidity in December in Rio?
How much does it rain in Rio in December?
How much does it snow in Rio in December?
What is the month with the shortest days in Rio?
What is the average length of the day in December in Rio?
When are sunrise and sunset in December in Rio?
How many hours of sunshine does Rio have in December?
What is the month with the lowest UV index in Rio?
What is the UV index intensity in December in Rio?
Average temperature in December
Rio, WI
- Average high temperature in December: 29.1°F
The warmest month (with the highest average high temperature) is July (78.6°F).
The month with the lowest average high temperature is January (22.6°F).
- Average low temperature in December: 19.2°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 (10.6°F).
Average pressure in December
Rio, WI
- Average pressure in December: 30.09"Hg
The months with the highest atmospheric pressure are January and February (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in December
Rio, WI
- Average wind speed in December: 9.2mph
The windiest month (with the highest average wind speed) is April (9.9mph).
The calmest month (with the lowest average wind speed) is August (6.6mph).
Average humidity in December
Rio, WI
- Average humidity in December: 85%
The month with the highest relative humidity is January (89%).
The month with the lowest relative humidity is April (76%).
Average rainfall in December
Rio, WI
- Average rainfall in December: 1.3"
The wettest month (with the highest rainfall) is June (3.54").
The driest month (with the least rainfall) is February (1.1").
Average rainfall days in December
Rio, WI
- Average rainfall days in December: 6.1 days
The month with the highest number of rainy days is June (17.2 days).
The month with the least rainy days is February (4.2 days).
Average snowfall in December
Rio, WI
- Average snowfall in December: 3.31"
The month with the highest snowfall is January (5.16").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Rio, WI
- Average snowfall days in December: 11.5 days
The month with the highest number of snowfall days is January (14.4 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Rio, 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 4min
The month with the most sunshine is July (Average sunshine: 9h and 54min).
The month with the least sunshine is January (Average sunshine: 3h and 12min).
Average sunshine days in December
Rio, WI
- Average sunshine days in December: 16.2 days
The month with the most sunshine days is September (16.5 days).
The month with the least sunshine days is June (10.8 days).
Average UV index in December
Rio, 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, November and December (UV index 1).
Average cloud cover in December
Rio, WI
- Average cloud cover in December: 63
The month with the most cloud cover is January (Cloud cover 66).
The months with the least cloud cover are July and August (Cloud cover 34).
Average visibility in December
Rio, WI
- Average visibility in December: 5mi
The months with the highest visibility are March, April, May, June, October and November (6mi).
The months with the lowest visibility are January, February, July, August, September and December (5mi).
Rio, Wisconsin, USA
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