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January 12th, 2026 :: 5:19 pm CST   

Local Weather Report for
Dekalb
Illinois, United States

 Current Dekalb Weather Conditions Updated January 12th at 3:55 pm 
Temperature:37°F Dew Point:32°F
Barometer:30.06 inHg Wind:calm
Humidity:80.6% Visibility:0M
 
 Dekalb Weather Forecast Summary  
 
Today
Jan 12th
Tuesday
Jan 13th
Wednesday
Jan 14th
Thursday
Jan 15th
Friday
Jan 16th
Cloudy Cloudy Cloudy Cloudy Cloudy
37°F
45°F
34°F
34°F
16°F
23°F
14°F
31°F
21°F
 
 Dekalb Detailed Weather Forecast  
 
Monday, January 12th, 2026
Evening Temperature: 32°F
Cloudy. Windy at times.
Tuesday, January 13th, 2026
Overnight Temperature: 34°F
Cloudy. Windy.
Morning Temperature: 41°F
Cloudy. Windy.
Afternoon Temperature: 41°F
Cloudy. Windy at times.
Evening Temperature: 37°F
Cloudy. Windy at times.
Wednesday, January 14th, 2026
Overnight Temperature: 31°F
Cloudy. Windy.
Morning Temperature: 20°F
Cloudy. Windy.
Afternoon Temperature: 19°F
Cloudy. Windy.
Evening Temperature: 17°F
Cloudy. Windy.
Thursday, January 15th, 2026
Overnight Temperature: 15°F
Clear. Windy.
Morning Temperature: 19°F
Cloudy. Windy at times.
Afternoon Temperature: 21°F
A mix of cloud and sun.
Evening Temperature: 19°F
Cloudy. Windy at times.
Friday, January 16th, 2026
Overnight Temperature: 22°F
Cloudy. Windy at times.
Morning Temperature: 27°F
Cloudy. Windy at times.
Afternoon Temperature: 29°F
Cloudy. Windy at times.
Evening Temperature: 27°F
Cloudy with a chance of flurries. Windy at times.
Saturday, January 17th, 2026
Overnight Temperature: 19°F
Cloudy with a chance of flurries. Windy at times.
Morning Temperature: 12°F
Cloudy with a chance of flurries. Windy.
Afternoon Temperature: 7°F
Cloudy with a chance of flurries. Windy at times.
Evening Temperature: 3°F
Cloudy. Windy.
Sunday, January 18th, 2026
Overnight Temperature: 0°F
Clear with cloudy periods. Windy at times.
Morning Temperature: 8°F
Cloudy. Windy at times.
Afternoon Temperature: 12°F
Mostly cloudy.
Evening Temperature: 14°F
Cloudy. Windy at times.
Monday, January 19th, 2026
Overnight Temperature: 19°F
Cloudy. Windy.
Morning Temperature: 28°F
Cloudy with a slight chance of flurries. Wind 25 to 40 mph.
Afternoon Temperature: 23°F
Sunny. Windy.
Evening Temperature: 22°F
A mix of cloudy and clear skies. Windy.
Tuesday, January 20th, 2026
Overnight Temperature: 20°F
Cloudy.
Morning Temperature: 27°F
Sunny with cloudy periods. Windy.
Afternoon Temperature: 20°F
A mix of cloud and sun. Windy at times.
Evening Temperature: 17°F
Cloudy.





 

  [ Local Weather Report ]
De Kalb, IL 
3:55 PM  37°F
 
 
Sycamore, IL 
3:55 PM  37°F
 
 
Genoa, IL 
 
Rochelle, IL 
 
Sandwich, IL 
 
Plano, IL 
 
Batavia, IL 
3:52 PM  37°F
 
 
Geneva, IL 
3:52 PM  37°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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