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 tends to be January, when average temperatures fluctuate between a high of 24.1°F (-4.4°C) and a low of 11.7°F (-11.3°C).Humidity
The months with the highest humidity are January and February, with an average relative humidity of 88%.Rainfall
The months with the least rainfall in Rockdale are January and February Rain falls for 4 days and accumulates 1.1" (28mm) of rain.Snowfall
January through May, October through December are months with snowfall. The month with the most snowfall is January, when snow falls for 11.9 days and typically aggregates up to 4.41" (112mm) of snow.Daylight
In Rockdale, the average length of the day in January is 9h and 26min.On the first day of the month, sunrise is at 7:27 am and sunset at 4:31 pm. On the last day of January, sunrise is at 7:12 am and sunset at 5:06 pm CST.
Sunshine
With an average of 3.3h of sunshine, January has the least sunshine of the year.UV index
The months with the lowest UV index are January, November and December, with an average maximum UV index of 1. A UV Index reading of 2, and below, represents a low threat to health from exposure to the Sun's UV radiation for the average person.Note: The daily high UV index of 1 in January translates into this advice:
Despite the majority tolerating prolonged sun exposure, those with sensitive skin, infants, and children demand continual protection. The mid-day Sun emits the most powerful UV radiation, so seek shade and minimize exposure. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Mind this! Nearly twice the UV radiation from the Sun can be reflected by the snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What month is the coldest?
How cold is it in Rockdale in January?
What is the most humid month?
What is the average humidity in January in Rockdale?
What is the driest month?
How many days does it rain in January?
What is the snowiest month?
How many days does it snow in January?
How many hours of daylight does Rockdale have in January?
What time are sunrise and sunset in January?
What is the month with the least sunshine?
How long on average sun shines in January?
What is the month with the lowest UV index?
What is the UV index intensity in January?
Average temperature in January
Rockdale, WI
- Average high temperature in January: 24.1°F
The warmest month (with the highest average high temperature) is July (79°F).
The month with the lowest average high temperature is January (24.1°F).
- Average low temperature in January: 11.7°F
The month with the highest average low temperature is July (61.5°F).
The coldest month (with the lowest average low temperature) is January (11.7°F).
Average pressure in January
Rockdale, 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
Rockdale, 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 (6.6mph).
Average humidity in January
Rockdale, WI
- Average humidity in January: 88%
The months with the highest relative humidity are January and February (88%).
The month with the lowest relative humidity is April (76%).
Average rainfall in January
Rockdale, WI
- Average rainfall in January: 1.1"
The wettest month (with the highest rainfall) is June (3.5").
The driest months (with the least rainfall) are January and February (1.1").
Average rainfall days in January
Rockdale, WI
- Average rainfall days in January: 4 days
The month with the highest number of rainy days is May (17.4 days).
The month with the least rainy days is January (4 days).
Average snowfall in January
Rockdale, WI
- Average snowfall in January: 4.41"
The month with the highest snowfall is January (4.41").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in January
Rockdale, WI
- Average snowfall days in January: 11.9 days
The month with the highest number of snowfall days is January (11.9 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in January /
Average sunshine in January
Rockdale, WI
- Average daylight in January: 9h and 2min
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 2min
The month with the most sunshine is July (Average sunshine: 9h and 48min).
The month with the least sunshine is January (Average sunshine: 3h and 18min).
Average sunshine days in January
Rockdale, WI
- Average sunshine days in January: 17.4 days
The month with the most sunshine days is December (17.5 days).
The month with the least sunshine days is June (10.7 days).
Average UV index in January
Rockdale, WI
- Average UV index in January: 1
The months with the highest UV index are May, June, July and August (UV index 5).
The months with the lowest UV index are January, November and December (UV index 1).
Average cloud cover in January
Rockdale, WI
- Average cloud cover in January: 65
The month with the most cloud cover is January (Cloud cover 65).
The month with the least cloud cover is July (Cloud cover 34).
Average visibility in January
Rockdale, 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).
Rockdale, Wisconsin, USA
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