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January 18th, 2026 :: 9:41 am CST   

Local Weather Report for
Dekalb
Illinois, United States

 Current Dekalb Weather Conditions Updated January 18th at 8:55 am 
Temperature:5°F Dew Point:-2°F
Barometer:30.04 inHg Wind:calm
Humidity:64.3% Visibility:0M
 
 Dekalb Weather Forecast Summary  
 
Today
Jan 18th
Monday
Jan 19th
Tuesday
Jan 20th
Wednesday
Jan 21st
Thursday
Jan 22nd
Cloudy Cloudy Cloudy Flurries Cloudy
18°F
9°F
-1°F
18°F
5°F
25°F
13°F
14°F
7°F
 
 Dekalb Detailed Weather Forecast  
 
Sunday, January 18th, 2026
Morning Temperature: 14°F
Cloudy. Windy at times.
Afternoon Temperature: 17°F
Cloudy with a chance of flurries. Windy at times.
Evening Temperature: 16°F
Cloudy with a chance of flurries. Windy.
Monday, January 19th, 2026
Overnight Temperature: 2°F
Cloudy. Windy.
Morning Temperature: 3°F
A mix of cloud and sun. Windy.
Afternoon Temperature: 5°F
Cloudy. Windy at times.
Evening Temperature: 8°F
Cloudy. Windy at times.
Tuesday, January 20th, 2026
Overnight Temperature: 7°F
Clear with cloudy periods. Windy at times.
Morning Temperature: 10°F
Sunny with cloudy periods. Windy at times.
Afternoon Temperature: 14°F
Cloudy.
Evening Temperature: 17°F
Cloudy with a chance of flurries. Windy at times.
Wednesday, January 21st, 2026
Overnight Temperature: 24°F
Cloudy with flurries likely. Windy at times.
Morning Temperature: 22°F
Cloudy. Windy.
Afternoon Temperature: 22°F
Cloudy. Windy.
Evening Temperature: 16°F
Mostly clear. Windy.
Thursday, January 22nd, 2026
Overnight Temperature: 9°F
Clear. Windy at times.
Morning Temperature: 11°F
Sunny with cloudy periods. Windy at times.
Afternoon Temperature: 8°F
Sunny.
Evening Temperature: 9°F
Cloudy.
Friday, January 23rd, 2026
Overnight Temperature: 15°F
Cloudy.
Morning Temperature: 23°F
Cloudy with a few flurries. Windy at times.
Afternoon Temperature: 25°F
Cloudy with a few flurries.
Evening Temperature: 19°F
Cloudy with flurries likely. Windy.
Saturday, January 24th, 2026
Overnight Temperature: 6°F
Cloudy. Windy.
Morning Temperature: 2°F
Cloudy. Windy.
Afternoon Temperature: 0°F
Cloudy. Windy at times.
Evening Temperature: -5°F
Cloudy. Windy at times.
Sunday, January 25th, 2026
Overnight Temperature: -13°F
Mostly clear. Windy at times.
Morning Temperature: -9°F
Sunny. Windy at times.
Afternoon Temperature: -9°F
Sunny. Windy at times.
Evening Temperature: -11°F
Clear. Windy at times.
Monday, January 26th, 2026
Overnight Temperature: -8°F
Mostly cloudy.
Morning Temperature: 3°F
Cloudy with a chance of flurries.
Afternoon Temperature: -1°F
Sunny.
Evening Temperature: -2°F
Clear.





 

  [ Local Weather Report ]
De Kalb, IL 
8:55 AM  5°F
 
 
Sycamore, IL 
8:55 AM  5°F
 
 
Genoa, IL 
 
Rochelle, IL 
 
Sandwich, IL 
 
Plano, IL 
 
Batavia, IL 
8:52 AM  7°F
 
 
Geneva, IL 
8:52 AM  7°F
 
 
Marengo, IL 
 
Belvidere, IL 

 
This WeatherCity Weather Forecast for Dekalb, Illinois, United States is computed using a computer-generated forecast model and should be considered experimental. Please confirm this weather information with your official weather information office

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