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
The start of December signals a considerable reduction in the average high-temperature, receding from a cold 41.4°F (5.2°C) in November to a freezing cold 26.2°F (-3.2°C). In Janesville, December nights witness a steady temperature drop to a still subzero cold 15.4°F (-9.2°C).Humidity
In Janesville, the average relative humidity in December is 88%.Rainfall
In December, the rain falls for 4.6 days. Throughout December, 1.42" (36mm) of precipitation is accumulated. In Janesville, Minnesota, during the entire year, the rain falls for 124.8 days and collects up to 24.25" (616mm) of precipitation.Snowfall
January through May, October through December are months with snowfall. In December, it is snowing for 12.8 days. Throughout December, 4.8" (122mm) of snow is accumulated. Throughout the year, there are 56.3 snowfall days, and 24.29" (617mm) of snow is accumulated.Daylight
The month with the shortest days in Janesville is December, with an average of 8h and 54min of daylight.On the first day of December in Janesville, sunrise is at 7:30 am and sunset at 4:37 pm. On the last day of the month, sunrise is at 7:49 am and sunset at 4:46 pm CST.
Sunshine
In Janesville, Minnesota, the average sunshine in December is 3.8h.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 reading of 2, and below, represents a low health risk from exposure to the Sun's UV radiation for the average person.Note: The maximum UV index of 1 during December leads to these instructions:
Prolonged sun exposure should always be prevented in babies, children, and those with sensitive skin. Direct exposure to the Sun's intense radiation around midday should be avoided for health reasons. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes. Be aware! The intensity of the Sun's UV radiation can be amplified nearly twice due to snow reflection.
Frequently asked questions
How cold is it in Janesville in December?
What is the average humidity in December in Janesville?
How much does it rain in Janesville in December?
How much does it snow in Janesville in December?
What is the month with the shortest days in Janesville?
What is the average length of the day in December in Janesville?
When are sunrise and sunset in December in Janesville?
How long on average sun shines in December in Janesville?
What is the month with the lowest UV index in Janesville?
How high is the UV index in December in Janesville?
Average temperature in December
Janesville, MN
- Average high temperature in December: 26.2°F
The warmest month (with the highest average high temperature) is July (80.1°F).
The month with the lowest average high temperature is January (21.2°F).
- Average low temperature in December: 15.4°F
The month with the highest average low temperature is July (62.4°F).
The coldest month (with the lowest average low temperature) is January (7.7°F).
Average pressure in December
Janesville, MN
- Average pressure in December: 30.11"Hg
The months with the highest atmospheric pressure are January and February (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).
Average wind speed in December
Janesville, MN
- Average wind speed in December: 8.8mph
The windiest month (with the highest average wind speed) is April (10mph).
The calmest month (with the lowest average wind speed) is July (7.2mph).
Average humidity in December
Janesville, 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 (70%).
Average rainfall in December
Janesville, MN
- Average rainfall in December: 1.42"
The wettest month (with the highest rainfall) is June (3.9").
The driest month (with the least rainfall) is January (0.75").
Average rainfall days in December
Janesville, MN
- Average rainfall days in December: 4.6 days
The month with the highest number of rainy days is June (17.5 days).
The month with the least rainy days is February (1.7 days).
Average snowfall in December
Janesville, MN
- Average snowfall in December: 4.8"
The month with the highest snowfall is February (6.26").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Janesville, MN
- Average snowfall days in December: 12.8 days
The month with the highest number of snowfall days is January (13.5 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Janesville, MN
- Average daylight in December: 8h and 5min
The month with the longest days is June (Average daylight: 15h and 24min).
The month with the shortest days is December (Average daylight: 8h and 54min).
- Average sunshine in December: 3h and 5min
The month with the most sunshine is July (Average sunshine: 10h and 0min).
The month with the least sunshine is January (Average sunshine: 3h and 12min).
Average sunshine days in December
Janesville, MN
- Average sunshine days in December: 15.8 days
The month with the most sunshine days is November (19.3 days).
The month with the least sunshine days is June (10.9 days).
Average UV index in December
Janesville, MN
- Average UV index in December: 1
The months with the highest UV index are June and 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
Janesville, MN
- Average cloud cover in December: 62
The month with the most cloud cover is January (Cloud cover 66).
The month with the least cloud cover is August (Cloud cover 31).
Average visibility in December
Janesville, 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 month with the lowest visibility is January (4mi).
Janesville, Minnesota, USA
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