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May 12th, 2026 :: 8:20 pm CDT   

Local Weather Report for
Dekalb
Illinois, United States

 Current Dekalb Weather Conditions Updated May 12th at 6:55 pm 
Temperature:68°F Dew Point:54°F
Barometer:29.8 inHg Wind:N 28 Mph
Humidity:60.0% Visibility:0M
 
 Dekalb Weather Forecast Summary  
 
Today
May 12th
Wednesday
May 13th
Thursday
May 14th
Friday
May 15th
Saturday
May 16th
Mix of Sun and Cloud Mix of Sun and Cloud Mostly Sunny Mix of Cloud and Sun Mostly Sunny
73°F
52°F
45°F
64°F
40°F
72°F
52°F
84°F
61°F
 
 Dekalb Detailed Weather Forecast  
 
Tuesday, May 12th, 2026
Evening Temperature: 62°F
Clear with cloudy periods with a chance of showers. Slight chance of a thunderstorm. Windy.
Wednesday, May 13th, 2026
Overnight Temperature: 49°F
Clear with a chance of showers. Windy.
Morning Temperature: 49°F
A mix of cloud and sun. Windy.
Afternoon Temperature: 52°F
A mix of cloud and sun. Windy.
Evening Temperature: 48°F
Clear with cloudy periods. Windy at times.
Thursday, May 14th, 2026
Overnight Temperature: 41°F
Clear.
Morning Temperature: 49°F
Sunny.
Afternoon Temperature: 63°F
Mostly sunny.
Evening Temperature: 54°F
Mostly clear.
Friday, May 15th, 2026
Overnight Temperature: 53°F
Cloudy with a slight chance of showers. Windy at times.
Morning Temperature: 53°F
Mostly cloudy. Windy.
Afternoon Temperature: 68°F
A mix of cloud and sun. Slight chance of a thunderstorm. Windy at times.
Evening Temperature: 67°F
Clear. Chance of a thunderstorm.
Saturday, May 16th, 2026
Overnight Temperature: 62°F
Mostly clear. Slight chance of a thunderstorm.
Morning Temperature: 69°F
Mostly sunny.
Afternoon Temperature: 82°F
Sunny.
Evening Temperature: 70°F
Clear. Slight chance of a thunderstorm. Windy at times.
Sunday, May 17th, 2026
Overnight Temperature: 62°F
Mostly clear. Windy at times.
Morning Temperature: 68°F
A mix of sun and cloud with a slight chance of showers. Windy.
Afternoon Temperature: 75°F
A mix of cloud and sun with a slight chance of showers or thundershowers. Windy.
Evening Temperature: 75°F
Mostly clear. Chance of a thunderstorm. Windy.
Monday, May 18th, 2026
Overnight Temperature: 68°F
Mostly clear with showers likely. Chance of a thunderstorm. Windy at times.
Morning Temperature: 71°F
Mostly cloudy with a few showers. Chance of a thunderstorm. Windy.
Afternoon Temperature: 69°F
Cloudy with showers likely. Slight chance of a thunderstorm. Windy.
Evening Temperature: 67°F
Cloudy with showers likely. Windy at times.
Tuesday, May 19th, 2026
Overnight Temperature: 59°F
Cloudy with showers likely.
Morning Temperature: 53°F
Cloudy with a chance of showers. Windy at times.
Afternoon Temperature: 63°F
A mix of cloud and sun.
Evening Temperature: 61°F
Cloudy with a slight chance of showers. Windy at times.
Wednesday, May 20th, 2026
Overnight Temperature: 49°F
A mix of cloudy and clear skies with a slight chance of showers. Windy at times.
Morning Temperature: 53°F
Sunny with cloudy periods. Windy at times.
Afternoon Temperature: 68°F
Sunny.
Evening Temperature: 65°F
A mix of cloudy and clear skies.





 

  [ Local Weather Report ]
De Kalb, IL 
6:55 PM  68°F
 
 
Sycamore, IL 
6:55 PM  68°F
 
 
Genoa, IL 
 
Rochelle, IL 
6:55 PM  72°F
 
 
Sandwich, IL 
 
Plano, IL 
 
Batavia, IL 
6:52 PM  64°F
Mostly Clear
 
Geneva, IL 
6:52 PM  64°F
Mostly Clear
 
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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