December weather forecastJanesville, MN
December
Weather in December
December, the first month of the winter in Janesville, is still a freezing cold month, with an average temperature fluctuating between 15.4°F (-9.2°C) and 26.2°F (-3.2°C).Temperature
December's onset is marked by a clear temperature decrease, falling from a cold 41.4°F (5.2°C) in November to a freezing cold 26.2°F (-3.2°C). Janesville, during the month of December, experiences an average low-temperature of 15.4°F (-9.2°C).Humidity
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, during the entire year, the rain falls for 124.8 days and collects up to 24.25" (616mm) of precipitation.Snowfall
Months with snowfall are January through May, October through December. In December, it is snowing for 12.8 days. Throughout December, 4.8" (122mm) of snow is accumulated. In Janesville, during the entire year, snow falls for 56.3 days and aggregates up to 24.29" (617mm) 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 7:30 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
The average sunshine in December is 3.8h.UV index
The months with the lowest UV index in Janesville are January, February, November and December, with an average maximum UV index of 1. A UV Index estimate of 2, and below, represents a minimal health hazard from unsafe exposure to UV radiation for average individuals.Note: In December, an average UV index of 1 transforms into the following instructions:
Children, infants, and individuals with sensitive skin should be constantly protected from extended sun exposure. Direct Sun exposure should be minimized especially during midday when radiation is most intense. Shield yourself from the harmful effects of UV radiation with sun-protective attire, a hat, and quality sunglasses. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
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 54min
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 48min
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).
