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June 12th, 2026 :: 1:09 pm CDT   

Local Weather Report for
Sullivan
Illinois, United States

 Sullivan Weather Forecast Summary  
 
Today
Jun 12th
Saturday
Jun 13th
Sunday
Jun 14th
Monday
Jun 15th
Tuesday
Jun 16th
Mostly Sunny Mostly Sunny Mostly Sunny Mix of Cloud and Sun Mostly Sunny
78°F
75°F
62°F
71°F
58°F
72°F
57°F
75°F
59°F
 
 Sullivan Detailed Weather Forecast  
 
Friday, June 12th, 2026
Afternoon Temperature: 78°F
Sunny. Windy at times.
Evening Temperature: 71°F
Clear.
Saturday, June 13th, 2026
Overnight Temperature: 63°F
Mostly clear.
Morning Temperature: 68°F
Sunny with cloudy periods. Windy at times.
Afternoon Temperature: 72°F
A mix of sun and cloud. Slight chance of a thunderstorm. Windy at times.
Evening Temperature: 72°F
Mostly clear. Chance of a thunderstorm.
Sunday, June 14th, 2026
Overnight Temperature: 69°F
Clear with cloudy periods. Slight chance of a thunderstorm. Windy at times.
Morning Temperature: 62°F
A mix of cloud and sun. Windy.
Afternoon Temperature: 70°F
Sunny. Windy at times.
Evening Temperature: 62°F
Mostly clear. Windy at times.
Monday, June 15th, 2026
Overnight Temperature: 58°F
Cloudy with clear periods.
Morning Temperature: 63°F
Sunny with cloudy periods.
Afternoon Temperature: 71°F
Sunny with cloudy periods. Slight chance of a thunderstorm.
Evening Temperature: 65°F
A mix of clear and cloudy skies. Slight chance of a thunderstorm.
Tuesday, June 16th, 2026
Overnight Temperature: 61°F
Clear with cloudy periods.
Morning Temperature: 65°F
Mostly sunny. Slight chance of a thunderstorm.
Afternoon Temperature: 74°F
Mostly sunny with a slight chance of showers or thundershowers.
Evening Temperature: 68°F
Clear with cloudy periods. Chance of a thunderstorm.
Wednesday, June 17th, 2026
Overnight Temperature: 63°F
Cloudy with a slight chance of showers. Windy at times.
Morning Temperature: 69°F
Sunny with cloudy periods with a slight chance of showers. Windy.
Afternoon Temperature: 81°F
Sunny. Chance of a thunderstorm. Windy.
Evening Temperature: 78°F
Clear with cloudy periods with a chance of showers or thundershowers. Wind 20 to 30 mph.
Thursday, June 18th, 2026
Overnight Temperature: 74°F
Mostly clear with showers likely. Chance of a thunderstorm. Windy.
Morning Temperature: 67°F
Mostly sunny with a chance of showers. Windy at times.
Afternoon Temperature: 76°F
Sunny. Windy at times.
Evening Temperature: 69°F
Clear.
Friday, June 19th, 2026
Overnight Temperature: 62°F
Mostly clear.
Morning Temperature: 69°F
Mostly sunny.
Afternoon Temperature: 73°F
Sunny with cloudy periods.
Evening Temperature: 72°F
A mix of clear and cloudy skies with a chance of showers. Slight chance of a thunderstorm.
Saturday, June 20th, 2026
Overnight Temperature: 69°F
A mix of cloudy and clear skies with showers likely. Windy at times.
Morning Temperature: 76°F
Sunny with cloudy periods with showers likely. Chance of a thunderstorm. Windy.
Afternoon Temperature: 86°F
Sunny with a chance of showers or thundershowers. Windy.
Evening Temperature: 80°F
Clear with showers likely. Chance of a thunderstorm. Windy.





 

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This WeatherCity Weather Forecast for Sullivan, 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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