1. North Region Illinois
Best window: Wednesday 11:00 PM-1:00 AM CDT
CLEAR
Data: 2026-05-20 (Fresh)
State stargazing forecast
This Illinois stargazing forecast is the state-level planning hub for tonight. Use it to decide if conditions are worth your time, where the strongest local pockets are, and when the best viewing window is most likely to hold. Start with the statewide signal, then compare the ranked locations below to avoid broad assumptions that can miss local cloud or moon-risk differences. If you are traveling for faint targets, prioritize darker locations and keep your departure aligned to the best-window range shown here. For final execution, open the state-scoped map and city pages before leaving so you can verify late shifts in limiting factors. This page is intentionally decision-first and should be used as the bridge between national outlook pages and location-level checks.
Borderline with timing
Tonight score: 69 (Good)
Best window: Wednesday 11:00 PM-1:00 AM CDT
Main limiter: Heavy cloud limits viewing tonight.
Quality-gated location candidates from current run
Best window: Wednesday 11:00 PM-1:00 AM CDT
CLEAR
Best window: Wednesday 11:00 PM-1:00 AM CDT
CLEAR
Best window: Wednesday 11:00 PM-1:00 AM CDT
CLEAR
Illinois planning strip
Thursday
94Good
Friday
93Good
Saturday
91Okay
Sunday
89Okay
Monday
87Poor
Tuesday
92Okay
Wednesday
93Good
Illinois planning basics
Current run shows mixed conditions, so timing and local pockets matter more than usual.
View the state map and city pages to compare local conditions, darkness, and short-window risk before travel.