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January 5th, 2026 :: 4:04 am CST   

Local Weather Report for
Eureka
Illinois, United States

 Eureka Weather Forecast Summary  
 
Today
Jan 5th
Tuesday
Jan 6th
Wednesday
Jan 7th
Thursday
Jan 8th
Friday
Jan 9th
Cloudy Mix of Cloud and Sun Cloudy Rain Cloudy
46°F
52°F
39°F
55°F
36°F
60°F
41°F
63°F
41°F
 
 Eureka Detailed Weather Forecast  
 
Monday, January 5th, 2026
Morning Temperature: 41°F
Cloudy. Windy at times.
Afternoon Temperature: 42°F
Cloudy.
Evening Temperature: 43°F
Cloudy. Windy at times.
Tuesday, January 6th, 2026
Overnight Temperature: 43°F
A mix of cloudy and clear skies. Windy at times.
Morning Temperature: 49°F
Sunny with cloudy periods. Windy at times.
Afternoon Temperature: 45°F
Sunny.
Evening Temperature: 40°F
Clear.
Wednesday, January 7th, 2026
Overnight Temperature: 36°F
Clear.
Morning Temperature: 47°F
Sunny. Windy at times.
Afternoon Temperature: 47°F
Sunny. Windy at times.
Evening Temperature: 45°F
Cloudy. Windy at times.
Thursday, January 8th, 2026
Overnight Temperature: 42°F
A mix of cloudy and clear skies.
Morning Temperature: 49°F
Cloudy. Windy at times.
Afternoon Temperature: 52°F
Cloudy with showers likely. Windy at times.
Evening Temperature: 57°F
Cloudy with rain. Wind 20 to 30 mph.
Friday, January 9th, 2026
Overnight Temperature: 57°F
Cloudy with clear periods with a chance of showers. Windy.
Morning Temperature: 58°F
Cloudy with a chance of showers. Windy.
Afternoon Temperature: 45°F
A mix of cloud and sun. Windy at times.
Evening Temperature: 42°F
Cloudy. Windy at times.
Saturday, January 10th, 2026
Overnight Temperature: 40°F
Cloudy with a chance of showers. Showers possibly mixed with wet flurries. Wind 20 to 30 mph.
Morning Temperature: 37°F
Cloudy with a slight chance of showers. Showers possibly mixed with wet flurries. Wind 20 to 30 mph.
Afternoon Temperature: 32°F
A mix of cloud and sun. Wind 20 to 30 mph.
Evening Temperature: 28°F
Cloudy. Windy.
Sunday, January 11th, 2026
Overnight Temperature: 26°F
Cloudy. Windy.
Morning Temperature: 29°F
Sunny with cloudy periods. Windy at times.
Afternoon Temperature: 28°F
Sunny.
Evening Temperature: 26°F
Clear.
Monday, January 12th, 2026
Overnight Temperature: 26°F
Clear.
Morning Temperature: 36°F
Sunny with cloudy periods. Windy.
Afternoon Temperature: 37°F
Cloudy. Windy at times.
Evening Temperature: 34°F
Clear. Windy at times.
Tuesday, January 13th, 2026
Overnight Temperature: 29°F
Clear with cloudy periods. Windy at times.
Morning Temperature: 36°F
Cloudy. Windy at times.
Afternoon Temperature: 36°F
Cloudy.
Evening Temperature: 38°F
Cloudy. Windy at times.





 

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This WeatherCity Weather Forecast for Eureka, 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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