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January 21st, 2026 :: 1:50 pm CST   

Local Weather Report for
Dekalb
Illinois, United States

 Current Dekalb Weather Conditions Updated January 21st at 12:55 pm 
Overcast
Temperature:23°F Dew Point:18°F
Barometer:29.92 inHg Wind:calm
Humidity:79.1% Visibility:0M
 
 Dekalb Weather Forecast Summary  
 
Today
Jan 21st
Thursday
Jan 22nd
Friday
Jan 23rd
Saturday
Jan 24th
Sunday
Jan 25th
Cloudy Cloudy Cloudy Cloudy Cloudy
27°F
20°F
0°F
-7°F
-14°F
6°F
-11°F
14°F
6°F
 
 Dekalb Detailed Weather Forecast  
 
Wednesday, January 21st, 2026
Afternoon Temperature: 25°F
Cloudy. Windy at times.
Evening Temperature: 22°F
Cloudy with a chance of flurries. Windy.
Thursday, January 22nd, 2026
Overnight Temperature: 13°F
Cloudy. Windy at times.
Morning Temperature: 19°F
Cloudy. Windy.
Afternoon Temperature: 16°F
Cloudy with sunny periods. Windy.
Evening Temperature: 4°F
A mix of cloudy and clear skies. Windy.
Friday, January 23rd, 2026
Overnight Temperature: -11°F
Cloudy. Windy.
Morning Temperature: -10°F
A mix of cloud and sun. Windy at times.
Afternoon Temperature: -8°F
Sunny. Windy at times.
Evening Temperature: -9°F
A mix of cloudy and clear skies.
Saturday, January 24th, 2026
Overnight Temperature: -10°F
Cloudy.
Morning Temperature: -3°F
Cloudy.
Afternoon Temperature: 2°F
Cloudy.
Evening Temperature: 4°F
Cloudy.
Sunday, January 25th, 2026
Overnight Temperature: 7°F
Cloudy.
Morning Temperature: 12°F
Cloudy.
Afternoon Temperature: 10°F
Cloudy.
Evening Temperature: 6°F
A mix of cloudy and clear skies. Windy at times.
Monday, January 26th, 2026
Overnight Temperature: 3°F
Cloudy. Windy at times.
Morning Temperature: 5°F
Sunny with cloudy periods. Windy at times.
Afternoon Temperature: 4°F
Sunny. Windy at times.
Evening Temperature: 5°F
Clear. Windy at times.
Tuesday, January 27th, 2026
Overnight Temperature: 7°F
Clear. Windy.
Morning Temperature: 21°F
Sunny. Windy.
Afternoon Temperature: 25°F
Sunny. Windy at times.
Evening Temperature: 21°F
Clear. Windy at times.
Wednesday, January 28th, 2026
Overnight Temperature: 16°F
Cloudy.
Morning Temperature: 21°F
Cloudy. Windy at times.
Afternoon Temperature: 22°F
Cloudy. Windy at times.
Evening Temperature: 21°F
Cloudy with a chance of flurries. Windy at times.
Thursday, January 29th, 2026
Overnight Temperature: 14°F
Cloudy with a chance of flurries. Windy.
Morning Temperature: 10°F
Cloudy. Windy.
Afternoon Temperature: 7°F
Sunny. Windy at times.
Evening Temperature: 3°F
Clear. Windy at times.





 

  [ Local Weather Report ]
De Kalb, IL 
12:55 PM  23°F
Overcast
 
Sycamore, IL 
12:55 PM  23°F
Overcast
 
Genoa, IL 
 
Rochelle, IL 
 
Sandwich, IL 
 
Plano, IL 
 
Batavia, IL 
12:52 PM  27°F
Overcast
 
Geneva, IL 
12:52 PM  27°F
Overcast
 
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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