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
A decrease in the average high-temperature is observed during December, shifting from a chilly 43.7°F (6.5°C) in November to a cold 32.4°F (0.2°C). In Rochester, the average temperature during the nights of December drops to a subzero cold 22.3°F (-5.4°C).Humidity
In Rochester, the average relative humidity in December is 82%.Rainfall
In Rochester, in December, during 8.7 rainfall days, 1.61" (41mm) of precipitation is typically accumulated. Throughout the year, in Rochester, Wisconsin, there are 158.7 rainfall days, and 29.88" (759mm) of precipitation is accumulated.Snowfall
Months with snowfall in Rochester are January through May, October through December. In December, it is snowing for 11.9 days. Throughout December, 3.46" (88mm) of snow is accumulated. In Rochester, Wisconsin, during the entire year, snow falls for 56.1 days and aggregates up to 20.04" (509mm) of snow.Daylight
With an average of 9h and 6min of daylight, December has the shortest days of the year in Rochester.On the first day of December in Rochester, sunrise is at 7:04 am and sunset at 4:20 pm. On the last day of the month, sunrise is at 7:23 am and sunset at 4:29 pm CST.
Sunshine
In December, the average sunshine in Rochester is 4h.UV index
January 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 minimal health vulnerability from unsafe exposure to UV radiation for the average person.Note: An average UV index of 1 in December transforms into this advice:
Children must always have sun protection, unlike most people, who can tolerate up to an hour in the sun without any burns. During midday, the Sun's radiation is strongest, and it's advisable to reduce direct exposure. Sun protection is enhanced with clothing that boasts a tight weave yet offers a loose fit. Be advised! The UV radiation from the Sun can be almost doubled due to the reflective properties of snow.
Frequently asked questions
How cold is December in Rochester?
What is the average humidity in December in Rochester?
How many days does it rain in December in Rochester?
How much does it snow in Rochester in December?
What is the month with the shortest days in Rochester?
What is the average length of the day in December in Rochester?
When is the sunrise / sunset in December in Rochester?
How long on average sun shines in December in Rochester?
When is the lowest UV index in Rochester?
What is the UV index reading in December in Rochester?
Average temperature in December
Rochester, WI
- Average high temperature in December: 32.4°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 (25.7°F).
- Average low temperature in December: 22.3°F
The month with the highest average low temperature is July (63°F).
The coldest month (with the lowest average low temperature) is January (14.4°F).
Average pressure in December
Rochester, WI
- Average pressure in December: 30.09"Hg
The months with the highest atmospheric pressure are January and February (30.1"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in December
Rochester, WI
- Average wind speed in December: 9.6mph
The windiest month (with the highest average wind speed) is January (10.2mph).
The calmest month (with the lowest average wind speed) is August (6.4mph).
Average humidity in December
Rochester, WI
- Average humidity in December: 82%
The month with the highest relative humidity is January (86%).
The months with the lowest relative humidity are April, October and November (77%).
Average rainfall in December
Rochester, WI
- Average rainfall in December: 1.61"
The wettest month (with the highest rainfall) is June (3.78").
The driest month (with the least rainfall) is February (1.54").
Average rainfall days in December
Rochester, WI
- Average rainfall days in December: 8.7 days
The month with the highest number of rainy days is May (19.2 days).
The month with the least rainy days is February (5.5 days).
Average snowfall in December
Rochester, WI
- Average snowfall in December: 3.46"
The month with the highest snowfall is January (5.43").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Rochester, WI
- Average snowfall days in December: 11.9 days
The month with the highest number of snowfall days is January (14.9 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Rochester, WI
- Average daylight in December: 9h and 1min
The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 6min).
- Average sunshine in December: 4h and 0min
The month with the most sunshine is August (Average sunshine: 10h and 12min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days in December
Rochester, WI
- Average sunshine days in December: 13.8 days
The month with the most sunshine days is November (16 days).
The month with the least sunshine days is June (9 days).
Average UV index in December
Rochester, WI
- Average UV index in December: 1
The months with the highest UV index are June, July and August (UV index 5).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in December
Rochester, WI
- Average cloud cover in December: 60
The month with the most cloud cover is January (Cloud cover 62).
The months with the least cloud cover are August and September (Cloud cover 30).
Average visibility in December
Rochester, WI
- Average visibility in December: 6mi
The months with the highest visibility are March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January and February (5mi).
Rochester, Wisconsin, USA
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