1. North Region Illinois
Best window: Monday 11:00 PM-2:00 AM CDT
Clear skies
State stargazing forecast
Illinois
Worth it tonight
Tonight score: 93 (Great)
Best window: Monday 11:00 PM-2:00 AM CDT
Main reason: Clear window with strong viewing conditions.
More planning links
How to use this state page
Use the statewide signal first, then compare ranked locations below before traveling. For final execution, open the state-scoped map and city pages before leaving so you can verify late shifts in limiting factors.
Best locations in Illinois tonight
Best places to check tonight
2. Central Region Illinois
Best window: Monday 11:00 PM-2:00 AM CDT
Clear skies
3. South Region Illinois
Best window: Monday 11:00 PM-2:00 AM CDT
Clear skies
Best nights this week
Illinois planning strip
Great 90-100Good 80-89Conditional 68-79Borderline 55-67Skip 0-54
Thursday
95Great
Friday
94Great
Saturday
92Great
Sunday
90Great
Monday
88Good
Tuesday
93Great
Wednesday
94Great
FAQ
Illinois planning basics
Is tonight good for stargazing in Illinois?
Current run suggests a strong window if you stay inside the best-time range.
Where should I check next?
View the state map and city pages to compare local conditions, darkness, and short-window risk before travel.