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
Rochester's transition into December is marked by a distinct drop in the average high-temperature, reducing from a wintry 41°F (5°C) in November to a subzero cold 26.2°F (-3.2°C). Rochester observes an average nighttime temperature of 15.8°F (-9°C) during December.Humidity
The average relative humidity in December in Rochester is 88%.Rainfall
In Rochester, in December, it is raining for 3.6 days, with typically 0.71" (18mm) of accumulated precipitation. Throughout the year, there are 109.7 rainfall days, and 16.57" (421mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through May, October through December. In December, in Rochester, it is snowing for 12 days. Throughout December, 1.81" (46mm) of snow is accumulated. Throughout the year, there are 55.2 snowfall days, and 14.09" (358mm) of snow is accumulated.Daylight
With an average of 9h and 0min of daylight, December has the shortest days of the year.On the first day of December, sunrise is at 7:25 am and sunset at 4:33 pm. On the last day of the month, sunrise is at 7:44 am and sunset at 4:41 pm CST.
Sunshine
The average sunshine in December is 3.7h.UV index
January, February, November and December, with an average maximum UV index of 1, are months with the lowest UV index. A UV Index value of 2, and less, symbolizes a low threat to health from exposure to the Sun's UV rays for the average person.Note: In December, a daily maximum UV index of 1 leads to the following instructions:
Extended sunlight exposure does not pose significant problems for most people, except for children, infants, and people with fair skin who always need shielding. The most potent solar radiation is around mid-day, so one should minimize exposure to direct sunlight during this period. Wearing a wide-brim hat can block approximately 50% of UV radiation, protecting the eyes. Forewarned is forearmed! The Sun's UV radiation can be almost doubled in intensity by snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is it in Rochester in December?
What is the average humidity in December in Rochester?
How much does it rain in Rochester in December?
How many days does it snow in December in Rochester?
What is the month with the shortest days in Rochester?
How many hours of daylight does Rochester have in December?
What time are sunrise and sunset in December in Rochester?
How many hours of sunshine does Rochester have in December?
What are the months with the lowest UV index in Rochester?
How high is the UV index in December in Rochester?
Average temperature in December
Rochester, MN
- Average high temperature in December: 26.2°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 (20.7°F).
- Average low temperature in December: 15.8°F
The month with the highest average low temperature is July (61.7°F).
The coldest month (with the lowest average low temperature) is January (7.7°F).
Average pressure in December
Rochester, MN
- Average pressure in December: 30.11"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).
Average wind speed in December
Rochester, MN
- Average wind speed in December: 10.1mph
The windiest month (with the highest average wind speed) is January (10.6mph).
The calmest months (with the lowest average wind speed) are July and August (7.5mph).
Average humidity in December
Rochester, MN
- Average humidity in December: 88%
The month with the highest relative humidity is January (91%).
The month with the lowest relative humidity is October (74%).
Average rainfall in December
Rochester, MN
- Average rainfall in December: 0.71"
The wettest month (with the highest rainfall) is June (3.11").
The driest month (with the least rainfall) is January (0.47").
Average rainfall days in December
Rochester, MN
- Average rainfall days in December: 3.6 days
The month with the highest number of rainy days is June (15.3 days).
The month with the least rainy days is February (2.3 days).
Average snowfall in December
Rochester, MN
- Average snowfall in December: 1.81"
The month with the highest snowfall is February (4.09").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Rochester, MN
- Average snowfall days in December: 12 days
The month with the highest number of snowfall days is January (12.8 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, MN
- 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 42min).
The month with the least sunshine is January (Average sunshine: 3h and 12min).
Average sunshine days in December
Rochester, MN
- Average sunshine days in December: 17.4 days
The month with the most sunshine days is November (18.9 days).
The month with the least sunshine days is June (11.2 days).
Average UV index in December
Rochester, MN
- 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
Rochester, MN
- Average cloud cover in December: 63
The month with the most cloud cover is January (Cloud cover 67).
The month with the least cloud cover is August (Cloud cover 32).
Average visibility in December
Rochester, MN
- 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).
Rochester, Minnesota, USA
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