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 coldest period is January, when temperatures fluctuate between an average high of 18.3°F (-7.6°C) and a low of 7°F (-13.9°C).Humidity
With an average relative humidity of 93%, January is the most humid month.Rainfall
The month with the least rainfall is January, when the rain falls for 3 days and typically collects 1.26" (32mm) of precipitation.Snowfall
Months with snowfall are January through May, October through December. In Mercer, during January, snow falls for 25.6 days and regularly aggregates up to 9.17" (233mm) of snow. Throughout the year, there are 120.8 snowfall days, and 54.92" (1395mm) of snow is accumulated.Daylight
In Mercer, the average length of the day in January is 9h and 7min.On the first day of the month, sunrise is at 7:42 am and sunset at 4:24 pm. On the last day of January, sunrise is at 7:24 am and sunset at 5:03 pm CST.
Sunshine
With an average of 1.9h of sunshine, January has the least sunshine of the year.UV index
January through March, 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 threat to health from exposure to the Sun's UV rays for the average person.Note: The maximum UV index of 1 during January translates into these guidelines:
It is important to always shield children, babies, and individuals with sensitive skin from prolonged exposure to the sun. Solar radiation is at its peak intensity during midday, so it's advisable to stay indoors or in the shade. A hat with a broad brim is indispensable, filtering out up to half of UV rays. Be informed! The Sun's UV radiation can be nearly doubled due to the reflection from snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What month is the coldest?
How cold is January?
What is the most humid month?
What is the average humidity in January in Mercer?
What is the driest month in Mercer?
How much does it rain in January?
How much does it snow in January?
How many hours of daylight does Mercer have in January?
When is the sunrise / sunset in January?
What is the month with the least sunshine in Mercer?
How many hours of sunshine does Mercer have in January?
When is the lowest UV index?
What is the UV index intensity in January in Mercer?
Average temperature in January
Mercer, WI
- Average high temperature in January: 18.3°F
The warmest month (with the highest average high temperature) is July (77.5°F).
The month with the lowest average high temperature is January (18.3°F).
- Average low temperature in January: 7°F
The month with the highest average low temperature is July (56.8°F).
The coldest month (with the lowest average low temperature) is January (7°F).
Average pressure in January
Mercer, WI
- Average pressure in January: 30.08"Hg
The month with the highest atmospheric pressure is February (30.1"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).
Average wind speed in January
Mercer, WI
- Average wind speed in January: 8.6mph
The windiest month (with the highest average wind speed) is November (8.8mph).
The calmest month (with the lowest average wind speed) is August (6.8mph).
Average humidity in January
Mercer, WI
- Average humidity in January: 93%
The month with the highest relative humidity is January (93%).
The month with the lowest relative humidity is May (71%).
Average rainfall in January
Mercer, WI
- Average rainfall in January: 1.26"
The wettest month (with the highest rainfall) is May (3.15").
The driest month (with the least rainfall) is January (1.26").
Average rainfall days in January
Mercer, WI
- Average rainfall days in January: 3 days
The months with the highest number of rainy days are May and June (16 days).
The month with the least rainy days is January (3 days).
Average snowfall in January
Mercer, WI
- Average snowfall in January: 9.17"
The month with the highest snowfall is December (10.75").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in January
Mercer, WI
- Average snowfall days in January: 25.6 days
The month with the highest number of snowfall days is January (25.6 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in January /
Average sunshine in January
Mercer, WI
- Average daylight in January: 9h and 1min
The month with the longest days is June (Average daylight: 15h and 42min).
The month with the shortest days is December (Average daylight: 8h and 42min).
- Average sunshine in January: 1h and 5min
The month with the most sunshine is July (Average sunshine: 9h and 54min).
The month with the least sunshine is January (Average sunshine: 1h and 54min).
Average sunshine days in January
Mercer, WI
- Average sunshine days in January: 6.3 days
The month with the most sunshine days is August (14.3 days).
The month with the least sunshine days is January (6.3 days).
Average UV index in January
Mercer, WI
- Average UV index in January: 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, February, March, November and December (UV index 1).
Average cloud cover in January
Mercer, WI
- Average cloud cover in January: 82
The month with the most cloud cover is January (Cloud cover 82).
The month with the least cloud cover is July (Cloud cover 37).
Average visibility in January
Mercer, WI
- Average visibility in January: 4mi
The months with the highest visibility are May and June (6mi).
The months with the lowest visibility are January, February and December (4mi).
Mercer, Wisconsin, USA
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