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September 9th, 2026 :: 10:50 am CDT   

Local Weather Report for
De Kalb
Illinois, United States

 Current De Kalb Weather Conditions Updated September 9th at 9:55 am 
moderate rain
Temperature:70°F Dew Point:70°F
Barometer:30.09 inHg Wind:N 17 Mph
Humidity:100.0% Visibility:0M
 
 De Kalb Weather Forecast Summary  
 
Today
Sep 9th
Thursday
Sep 10th
Friday
Sep 11th
Saturday
Sep 12th
Sunday
Sep 13th
Thundershowers Mostly Sunny Mostly Sunny Mostly Sunny Mix of Cloud and Sun
77°F
75°F
61°F
75°F
57°F
80°F
59°F
77°F
65°F
 
 De Kalb Detailed Weather Forecast  
 
Wednesday, September 9th, 2026
Afternoon Temperature: 75°F
Mostly cloudy with showers likely. Chance of a thunderstorm. Windy at times.
Evening Temperature: 70°F
Mostly clear. Chance of a thunderstorm.
Thursday, September 10th, 2026
Overnight Temperature: 63°F
Mostly clear.
Morning Temperature: 65°F
Sunny with cloudy periods.
Afternoon Temperature: 74°F
Sunny with cloudy periods.
Evening Temperature: 64°F
Clear.
Friday, September 11th, 2026
Overnight Temperature: 59°F
Clear.
Morning Temperature: 62°F
Sunny.
Afternoon Temperature: 74°F
Sunny.
Evening Temperature: 65°F
Mostly clear.
Saturday, September 12th, 2026
Overnight Temperature: 59°F
Mostly clear.
Morning Temperature: 65°F
Sunny. Windy at times.
Afternoon Temperature: 79°F
Sunny with cloudy periods. Chance of a thunderstorm. Windy at times.
Evening Temperature: 72°F
Mostly clear. Chance of a thunderstorm.
Sunday, September 13th, 2026
Overnight Temperature: 66°F
Mostly clear.
Morning Temperature: 69°F
Sunny with cloudy periods.
Afternoon Temperature: 77°F
Mostly cloudy.
Evening Temperature: 70°F
Cloudy with a chance of showers.
Monday, September 14th, 2026
Overnight Temperature: 68°F
Mostly cloudy with a chance of showers. Windy at times.
Morning Temperature: 69°F
Cloudy with a chance of showers.
Afternoon Temperature: 73°F
A mix of cloud and sun with a chance of showers. Slight chance of a thunderstorm. Windy at times.
Evening Temperature: 74°F
Cloudy with showers. Chance of a thunderstorm. Windy.
Tuesday, September 15th, 2026
Overnight Temperature: 69°F
A mix of cloudy and clear skies with a few showers.
Morning Temperature: 68°F
Mostly cloudy. Slight chance of a thunderstorm. Windy at times.
Afternoon Temperature: 71°F
Mostly cloudy.
Evening Temperature: 61°F
Clear with cloudy periods.
Wednesday, September 16th, 2026
Overnight Temperature: 59°F
A mix of cloudy and clear skies.
Morning Temperature: 62°F
A mix of cloud and sun.
Afternoon Temperature: 73°F
Mostly sunny.
Evening Temperature: 61°F
Clear.
Thursday, September 17th, 2026
Overnight Temperature: 60°F
Clear. Windy at times.
Morning Temperature: 68°F
Sunny with cloudy periods with showers likely. Slight chance of a thunderstorm. Windy at times.
Afternoon Temperature: 74°F
A mix of cloud and sun with a chance of showers or thundershowers. Windy.
Evening Temperature: 55°F
A mix of cloudy and clear skies with a slight chance of showers. Windy at times.





 

  [ Local Weather Report ]
Dekalb, IL 
9:55 AM  70°F
moderate rain
 
Sycamore, IL 
9:55 AM  70°F
moderate rain
 
Genoa, IL 
 
Rochelle, IL 
9:55 AM  70°F
light drizzle
 
Sandwich, IL 
 
Batavia, IL 
9:52 AM  72°F
light rain
 
Geneva, IL 
9:52 AM  72°F
light rain
 
Plano, IL 
 
Marengo, IL 
 
Aurora, IL 

 
This WeatherCity Weather Forecast for De Kalb, 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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