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 temperatures occur during January, when averages reach a peak of 28°F (-2.2°C) and a low of 16.7°F (-8.5°C).Humidity
The months with the highest humidity are January and February, with an average relative humidity of 83%.Rainfall
In Glen Ellyn, in January, it is raining for 6.4 days, with typically 1.81" (46mm) of accumulated precipitation. In Glen Ellyn, during the entire year, the rain falls for 164.3 days and collects up to 33.78" (858mm) of precipitation.Snowfall
January through May, October through December are months with snowfall in Glen Ellyn. January is the month with the most snowfall in Glen Ellyn, Illinois. Snow falls for 13.1 days and accumulates 5.87" (149mm) of snow.Daylight
In January, the average length of the day in Glen Ellyn is 9h and 33min.On the first day of the month, sunrise is at 7:19 am and sunset at 4:31 pm. On the last day of January, sunrise is at 7:05 am and sunset at 5:05 pm CST.
Sunshine
January has the least sunshine of the year in Glen Ellyn, with an average of 3.7h of sunshine.UV index
The month with the lowest UV index in Glen Ellyn is January, with an average maximum UV index of 1. A UV Index of 2, and less, symbolizes a minimal health hazard from exposure to the Sun's UV radiation for the ordinary person.Note: In January, the maximum UV index of 1 translates into these guidelines:
Babies, children, and those with sensitive skin should always avoid extended periods in the sun. Avoiding the Sun during its peak radiation time around midday is a healthy practice. During bright days, sunglasses that offer UVA and UVB defense are recommended. Be attentive! The reflective property of snow can nearly double the Sun's UV radiation.
Frequently asked questions
What is the coldest time of year in Glen Ellyn?
How cold is January in Glen Ellyn?
What is the most humid month in Glen Ellyn?
What is the average humidity in January in Glen Ellyn?
How many days does it rain in January in Glen Ellyn?
When does it snow the most in Glen Ellyn?
How much does it snow in Glen Ellyn in January?
What is the average length of the day in January in Glen Ellyn?
What time are sunrise and sunset in January in Glen Ellyn?
What is the month with the least sunshine in Glen Ellyn?
How many hours of sunshine does Glen Ellyn have in January?
When is the lowest UV index in Glen Ellyn?
What is the UV index intensity in January in Glen Ellyn?
Average temperature in January
Glen Ellyn, IL
- Average high temperature in January: 28°F
The warmest month (with the highest average high temperature) is July (81.7°F).
The month with the lowest average high temperature is January (28°F).
- Average low temperature in January: 16.7°F
The month with the highest average low temperature is July (65.3°F).
The coldest month (with the lowest average low temperature) is January (16.7°F).
Average pressure in January
Glen Ellyn, 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
Glen Ellyn, IL
- Average wind speed in January: 9.8mph
The windiest month (with the highest average wind speed) is January (9.8mph).
The calmest month (with the lowest average wind speed) is August (6mph).
Average humidity in January
Glen Ellyn, IL
- Average humidity in January: 83%
The months with the highest relative humidity are January and February (83%).
The month with the lowest relative humidity is October (73%).
Average rainfall in January
Glen Ellyn, IL
- Average rainfall in January: 1.81"
The wettest month (with the highest rainfall) is May (4.45").
The driest months (with the least rainfall) are November and December (1.65").
Average rainfall days in January
Glen Ellyn, IL
- Average rainfall days in January: 6.4 days
The month with the highest number of rainy days is July (20.1 days).
The month with the least rainy days is February (5.8 days).
Average snowfall in January
Glen Ellyn, IL
- Average snowfall in January: 5.87"
The month with the highest snowfall is January (5.87").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in January
Glen Ellyn, IL
- Average snowfall days in January: 13.1 days
The month with the highest number of snowfall days is January (13.1 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in January /
Average sunshine in January
Glen Ellyn, IL
- Average daylight in January: 9h and 3min
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: 9h and 54min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days in January
Glen Ellyn, IL
- Average sunshine days in January: 14.3 days
The month with the most sunshine days is November (16.1 days).
The month with the least sunshine days is July (8.2 days).
Average UV index in January
Glen Ellyn, IL
- Average UV index in January: 1
The months with the highest UV index are June, July and August (UV index 6).
The month with the lowest UV index is January (UV index 1).
Average cloud cover in January
Glen Ellyn, IL
- Average cloud cover in January: 61
The month with the most cloud cover is January (Cloud cover 61).
The months with the least cloud cover are August and September (Cloud cover 32).
Average visibility in January
Glen Ellyn, 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).
Glen Ellyn, Illinois, USA
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