The Star WindowMap-first stargazing decisionsData: 2026-04-04 (Fresh)

Data: 2026-04-04 (Fresh)

Saved placesSign inGet alerts

City stargazing forecast

South Region Illinois

Worth planning tonight

City-level planning view for South Region Illinois.

Use this page to verify tonight's best window before committing to travel.

State: Illinois

Tonight score: 83

Best window: Sunday 3:00 AM-6:00 AM CDT

Main factor: CLEAR

View full location pageParent state forecastView on mapStargazing forecast tonightMilky Way in this state

Why tonight

Decision factors that drive the score

Clouds: 11%

Moon interference: 53%

Darkness: 86%

Light pollution: Low

Darkness class: B3

Good dark sky. Milky Way visible with contrast loss.

Best nights this week

South Region Illinois planning strip

Thursday

85

Good

Friday

84

Good

Saturday

82

Okay

Sunday

80

Okay

Monday

78

Poor

Tuesday

83

Okay

Wednesday

84

Good

FAQ

South Region Illinois quick planning guidance

Is South Region Illinois worth it tonight?

Yes, current conditions are favorable if you follow the best window.

What is the biggest limiter here tonight?

CLEAR. Compare nearby options before driving if your margin is tight.