The Star WindowMap-first stargazing decisionsData: 2026-05-20 (Fresh)

Data: 2026-05-20 (Fresh)

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City stargazing forecast

South Region Montana

Likely skip tonight

City-level planning view for South Region Montana.

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

State: Montana

Tonight score: 38

Best window: Thursday 1:00 AM-3:00 AM MDT

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: 17%

Moon interference: 53%

Darkness: 95%

Light pollution: Low

Darkness class: B2

Excellent dark sky. Milky Way structure is strong.

Best nights this week

South Region Montana planning strip

Thursday

89

Good

Friday

88

Good

Saturday

86

Okay

Sunday

84

Okay

Monday

82

Poor

Tuesday

87

Okay

Wednesday

88

Good

FAQ

South Region Montana quick planning guidance

Is South Region Montana worth it tonight?

Conditions are mixed, so this is more timing-sensitive tonight.

What is the biggest limiter here tonight?

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