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 temperatures fluctuating between a high of 27.9°F (-2.3°C) and a low of 16.7°F (-8.5°C), January stands out as the coldest month.Humidity
The months with the highest humidity are January and February, with an average relative humidity of 83%.Rainfall
In January, the rain falls for 4.1 days. Throughout January, 0.55" (14mm) of precipitation is accumulated. Throughout the year, there are 119.1 rainfall days, and 10.83" (275mm) of precipitation is accumulated.Snowfall
January through April, October through December are months with snowfall in Carol Stream. The month with the most snowfall is January, when snow falls for 9.3 days and typically aggregates up to 1.5" (38mm) of snow.Daylight
In January, the average length of the day is 9h and 32min.On the first day of the month, sunrise is at 7:20 am and sunset at 4:31 pm. On the last day of January, sunrise is at 7:06 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.UV index
January and December, with an average maximum UV index of 1, are months with the lowest UV index. A UV Index value of 2, and less, symbolizes a low threat to health from unsafe exposure to UV radiation for ordinary individuals.Note: The daily high UV index of 1 during January translates into the following recommendations:
Children, babies, and those with sensitive skin should always be shielded from long periods of sun exposure. The solar radiation around mid-day is intense; avoid the Sun and stay safe. In the presence of strong sunlight, it's crucial to wear sunglasses that ward off UVA and UVB rays. Mark this! Snow reflection can nearly double the UV radiation intensity from the Sun.
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 January?
What are the most humid months?
What is the average humidity in January?
How many days does it rain in January?
What is the snowiest month?
How many days does it snow in January?
What is the average length of the day in January?
When are sunrise and sunset in January?
What is the month with the least sunshine?
How long on average sun shines in January in Carol Stream?
What is the month with the lowest UV index?
What is the UV index reading in January?
Average temperature in January
Carol Stream, IL
- Average high temperature in January: 27.9°F
The warmest month (with the highest average high temperature) is July (81.5°F).
The month with the lowest average high temperature is January (27.9°F).
- Average low temperature in January: 16.7°F
The month with the highest average low temperature is July (64.9°F).
The coldest month (with the lowest average low temperature) is January (16.7°F).
Average pressure in January
Carol Stream, 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
Carol Stream, 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 (6.1mph).
Average humidity in January
Carol Stream, 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 (74%).
Average rainfall in January
Carol Stream, IL
- Average rainfall in January: 0.55"
The wettest month (with the highest rainfall) is May (1.65").
The driest months (with the least rainfall) are February, November and December (0.51").
Average rainfall days in January
Carol Stream, IL
- Average rainfall days in January: 4.1 days
The month with the highest number of rainy days is June (15 days).
The month with the least rainy days is January (4.1 days).
Average snowfall in January
Carol Stream, IL
- Average snowfall in January: 1.5"
The month with the highest snowfall is January (1.5").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in January
Carol Stream, IL
- Average snowfall days in January: 9.3 days
The month with the highest number of snowfall days is January (9.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in January /
Average sunshine in January
Carol Stream, 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 months with the most sunshine are July and August (Average sunshine: 9h and 54min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days in January
Carol Stream, IL
- Average sunshine days in January: 19.8 days
The month with the most sunshine days is November (20.6 days).
The month with the least sunshine days is July (11.3 days).
Average UV index in January
Carol Stream, IL
- Average UV index in January: 1
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in January
Carol Stream, 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 July, August and September (Cloud cover 32).
Average visibility in January
Carol Stream, IL
- Average visibility in January: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Carol Stream, Illinois, USA
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