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
With average high temperatures of 28.9°F (-1.7°C) and lows of 18.3°F (-7.6°C), January is the coldest month.Humidity
The months with the highest humidity in Willowbrook are January and February, with an average relative humidity of 82%.Rainfall
In Willowbrook, in January, it is raining for 7.8 days, with typically 1.89" (48mm) of accumulated precipitation. Throughout the year, there are 166.8 rainfall days, and 34.96" (888mm) of precipitation is accumulated.Snowfall
January through April, October through December are months with snowfall in Willowbrook. In Willowbrook, during January, snow falls for 13.3 days and regularly aggregates up to 5.2" (132mm) of snow. Throughout the year, there are 47.1 snowfall days, and 19.02" (483mm) of snow is accumulated.Daylight
In Willowbrook, the average length of the day in January is 9h and 34min.On the first day of January, sunrise is at 7:18 am and sunset at 4:31 pm. On the last day of the month, sunrise is at 7:05 am and sunset at 5:05 pm CST.
Sunshine
With an average of 3.7h of sunshine, January has the least sunshine of the year in Willowbrook.UV index
The average daily maximum UV index in January is 2. A UV Index estimate of 2, and below, represents a minimal health hazard from unsafe exposure to UV radiation for ordinary individuals.Note: The UV index of 2 during January translates into the following guidance:
In contrast to children, who must always be shielded from the sun, most people can tolerate up to an hour of sun exposure without any burns. To guard against the harmful effects of the Sun, minimize exposure during midday. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance. Pay attention! The reflection of snow can enhance the Sun's UV radiation almost double.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the coldest months in Willowbrook?
How cold is it in Willowbrook in January?
What are the most humid months in Willowbrook?
What is the average humidity in January in Willowbrook?
How much does it rain in Willowbrook in January?
How many days does it snow in January in Willowbrook?
What is the average length of the day in January in Willowbrook?
What time are sunrise and sunset in January in Willowbrook?
What is the month with the least sunshine in Willowbrook?
How long on average sun shines in January in Willowbrook?
What is the UV index intensity in January in Willowbrook?
Average temperature in January
Willowbrook, IL
- Average high temperature in January: 28.9°F
The warmest month (with the highest average high temperature) is July (81.9°F).
The month with the lowest average high temperature is January (28.9°F).
- Average low temperature in January: 18.3°F
The month with the highest average low temperature is July (66.6°F).
The coldest month (with the lowest average low temperature) is January (18.3°F).
Average pressure in January
Willowbrook, IL
- 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 (29.92"Hg).
Average wind speed in January
Willowbrook, IL
- Average wind speed in January: 10.2mph
The windiest month (with the highest average wind speed) is January (10.2mph).
The calmest month (with the lowest average wind speed) is August (6.3mph).
Average humidity in January
Willowbrook, IL
- Average humidity in January: 82%
The months with the highest relative humidity are January and February (82%).
The month with the lowest relative humidity is October (72%).
Average rainfall in January
Willowbrook, IL
- Average rainfall in January: 1.89"
The wettest month (with the highest rainfall) is May (4.61").
The driest months (with the least rainfall) are November and December (1.77").
Average rainfall days in January
Willowbrook, IL
- Average rainfall days in January: 7.8 days
The month with the highest number of rainy days is June (19.4 days).
The month with the least rainy days is February (5.9 days).
Average snowfall in January
Willowbrook, IL
- Average snowfall in January: 5.2"
The month with the highest snowfall is February (5.28").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in January
Willowbrook, IL
- Average snowfall days in January: 13.3 days
The month with the highest number of snowfall days is January (13.3 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in January /
Average sunshine in January
Willowbrook, IL
- Average daylight in January: 9h and 4min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in January: 3h and 4min
The month with the most sunshine is August (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days in January
Willowbrook, IL
- Average sunshine days in January: 12.8 days
The month with the most sunshine days is November (16.1 days).
The month with the least sunshine days is June (8.2 days).
Average UV index in January
Willowbrook, IL
- Average UV index in January: 2
The months with the highest UV index are July and August (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in January
Willowbrook, IL
- Average cloud cover in January: 61
The month with the most cloud cover is January (Cloud cover 61).
The month with the least cloud cover is August (Cloud cover 29).
Average visibility in January
Willowbrook, IL
- Average visibility in January: 5mi
The months with the highest visibility are March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January and February (5mi).
Willowbrook, Illinois, USA
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