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January 4th, 2026 :: 11:04 am CST   

Local Weather Report for
Eureka
Illinois, United States

 Eureka Weather Forecast Summary  
 
Today
Jan 4th
Monday
Jan 5th
Tuesday
Jan 6th
Wednesday
Jan 7th
Thursday
Jan 8th
Cloudy Cloudy Cloudy Mostly Sunny Cloudy
36°F
47°F
32°F
57°F
41°F
54°F
37°F
52°F
40°F
 
 Eureka Detailed Weather Forecast  
 
Sunday, January 4th, 2026
Morning Temperature: 31°F
Cloudy.
Afternoon Temperature: 33°F
A mix of cloud and sun. Windy at times.
Evening Temperature: 34°F
Clear with cloudy periods. Windy at times.
Monday, January 5th, 2026
Overnight Temperature: 33°F
A mix of clear and cloudy skies. Windy at times.
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
Cloudy. Windy at times.
Morning Temperature: 52°F
Sunny with cloudy periods. Windy.
Afternoon Temperature: 49°F
Sunny. Windy.
Evening Temperature: 43°F
Clear. Windy at times.
Wednesday, January 7th, 2026
Overnight Temperature: 37°F
Clear.
Morning Temperature: 47°F
Sunny. Windy at times.
Afternoon Temperature: 47°F
Sunny. Windy at times.
Evening Temperature: 44°F
Mostly clear. Windy at times.
Thursday, January 8th, 2026
Overnight Temperature: 41°F
Clear.
Morning Temperature: 48°F
Cloudy. Windy at times.
Afternoon Temperature: 43°F
Cloudy.
Evening Temperature: 40°F
Cloudy.
Friday, January 9th, 2026
Overnight Temperature: 38°F
Cloudy.
Morning Temperature: 38°F
Cloudy with a slight chance of showers. Showers possibly mixed with wet flurries.
Afternoon Temperature: 37°F
Cloudy with a chance of showers. Showers possibly mixed with wet flurries.
Evening Temperature: 35°F
Cloudy. Windy at times.
Saturday, January 10th, 2026
Overnight Temperature: 32°F
Cloudy with a chance of flurries or showers. Risk of freezing rain. Windy.
Morning Temperature: 31°F
Cloudy. Windy.
Afternoon Temperature: 28°F
A mix of cloud and sun. Windy at times.
Evening Temperature: 24°F
Clear with cloudy periods. Windy at times.
Sunday, January 11th, 2026
Overnight Temperature: 21°F
Clear. Windy at times.
Morning Temperature: 29°F
Sunny. Windy at times.
Afternoon Temperature: 28°F
Sunny.
Evening Temperature: 28°F
Clear. Windy at times.
Monday, January 12th, 2026
Overnight Temperature: 29°F
Clear. Windy.
Morning Temperature: 40°F
Mostly sunny. Windy.
Afternoon Temperature: 43°F
Cloudy. Windy.
Evening Temperature: 40°F
Clear. Windy.





 

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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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