Contents
- Weather in January
- Frequently asked questions
- Average temperature in January
- Average pressure in January
- Average wind speed in January
- Average humidity in January
- Average rainfall in January
- Average rainfall days in January
- Average snowfall in January
- Average snowfall days in January
- Average daylight in January
- Average sunshine in January
- Average sunshine days in January
- Average UV index in January
- Average cloud cover in January
- Average visibility in January
Weather in January
Temperature
The month of January, characterized by an average high of 25°F (-3.9°C) and a low of 12.9°F (-10.6°C), is recognized as the coldest.Humidity
The most humid month in Janesville is January, with an average relative humidity of 87%.Rainfall
The months with the least rainfall are January and February Rain falls for 3.5 days and accumulates 0.75" (19mm) of rain.Snowfall
Months with snowfall in Janesville are January through April, October through December. January is the month with the most snowfall in Janesville. Snow falls for 12.5 days and accumulates 2.83" (72mm) of snow.Daylight
In January, the average length of the day in Janesville is 9h and 28min.On the first day of the month, sunrise is at 7:26 am and sunset at 4:32 pm. On the last day of January, sunrise is at 7:11 am and sunset at 5:07 pm CST.
Sunshine
With an average of 3.5h of sunshine, January has the least sunshine of the year in Janesville, Wisconsin.UV index
January and December, with an average maximum UV index of 1, are months with the lowest UV index in Janesville, Wisconsin. A UV Index of 2, and less, symbolizes a minimal health hazard from exposure to the Sun's UV radiation for the average person.Note: A typical high UV index of 1 in January suggests the following recommendations:
While most people can stay under the sun for an hour without burning, children must always be guarded against sun exposure. Limiting exposure to the direct Sun during midday hours can help prevent harmful UV radiation effects. Experience reduced UV exposure by about half when donning a wide-brim hat. Notice this! Nearly double the intensity of the Sun's UV radiation can be caused by snow reflection.
Frequently asked questions
What part of the year is the coldest in Janesville?
How cold is it in Janesville in January?
What is the most humid month in Janesville?
What is the average humidity in January in Janesville?
What is the driest month in Janesville?
How many days does it rain in January in Janesville?
What is the snowiest month in Janesville?
How much does it snow in Janesville in January?
What is the average length of the day in January in Janesville?
When is the sunrise / sunset in January in Janesville?
What is the month with the least sunshine in Janesville?
How long on average sun shines in January in Janesville?
What is the month with the lowest UV index in Janesville?
What is the UV index intensity in January in Janesville?
Average temperature in January
Janesville, WI
- Average high temperature in January: 25°F
The warmest month (with the highest average high temperature) is July (79.7°F).
The month with the lowest average high temperature is January (25°F).
- Average low temperature in January: 12.9°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 (12.9°F).
Average pressure in January
Janesville, WI
- Average pressure in January: 30.11"Hg
The month with the highest atmospheric pressure is January (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in January
Janesville, WI
- Average wind speed in January: 9.6mph
The windiest month (with the highest average wind speed) is April (10.1mph).
The calmest month (with the lowest average wind speed) is August (6.4mph).
Average humidity in January
Janesville, WI
- Average humidity in January: 87%
The month with the highest relative humidity is January (87%).
The months with the lowest relative humidity are April and October (76%).
Average rainfall in January
Janesville, WI
- Average rainfall in January: 0.75"
The wettest month (with the highest rainfall) is June (2.76").
The driest months (with the least rainfall) are January and February (0.75").
Average rainfall days in January
Janesville, WI
- Average rainfall days in January: 3.5 days
The month with the highest number of rainy days is June (16.3 days).
The month with the least rainy days is January (3.5 days).
Average snowfall in January
Janesville, WI
- Average snowfall in January: 2.83"
The month with the highest snowfall is January (2.83").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in January
Janesville, WI
- Average snowfall days in January: 12.5 days
The month with the highest number of snowfall days is January (12.5 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in January /
Average sunshine in January
Janesville, WI
- Average daylight in January: 9h and 3min
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 January: 3h and 3min
The months with the most sunshine are July and August (Average sunshine: 9h and 42min).
The month with the least sunshine is January (Average sunshine: 3h and 30min).
Average sunshine days in January
Janesville, WI
- Average sunshine days in January: 17.1 days
The month with the most sunshine days is November (19.1 days).
The month with the least sunshine days is June (10.9 days).
Average UV index in January
Janesville, WI
- Average UV index in January: 1
The month with the highest UV index is June (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in January
Janesville, WI
- Average cloud cover in January: 64
The month with the most cloud cover is January (Cloud cover 64).
The month with the least cloud cover is September (Cloud cover 34).
Average visibility in January
Janesville, WI
- Average visibility in January: 5mi
The months with the highest visibility are March, April, May, June, October, November and December (6mi).
The months with the lowest visibility are January, February, July, August and September (5mi).
Janesville, Wisconsin, USA
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