Chicago, US Clear Sky Chart

Chicago, US (41.88°, -87.63°) · Updated 15:33 CDT
55
Mixed
high confidence ⓘ
high · Forecast stability

Tonight's forecast has held steady across recent updates. We compare how much tonight's score has moved across our recent forecast updates, a score that's held steady is more trustworthy.

Confidence reflects how trustworthy the forecast is, it doesn't change the score.

Worth a short session
BEST 19:00–23:00 (4h)
Mostly clear skies with moderate moon interference. Best conditions early, deteriorating later.
Sunset
17:49
Sunrise
07:19
Usable Hours
8/11
Moon
87%
Visible Planets
♂ Mars55° SE
♃ Jupiter49° SE
♄ Saturn49° S
⛢ Uranus69° S
♆ Neptune48° S
Sky darkness
City sky (Bortle 8-9)
SQM 16.9, estimated from satellite night lights. A property of the place, separate from tonight’s score. How we estimate this
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Hour-by-hour scores · Planet rise/set & visibility · ISS & satellite passes · Moon detail · Full score breakdown · Aurora & observer profiles

Stargazing in Chicago, US

Chicago's lakefront Bortle 8–9 is among the brightest in the Midwest, but driving 90 minutes west or south reaches Bortle 4–5 rural Illinois. The Adler Planetarium hosts regular lakefront stargazing events. Lake Michigan creates its own weather — lake-effect clouds are common in autumn and winter, but offshore breezes in summer can keep the sky clear. The flat terrain provides huge open horizons in every direction once out of the urban area.

Chicago, US Stargazing FAQ

Where can I stargaze near Chicago?∨
Rural Illinois and Indiana reach Bortle 4-5 within 90 minutes of the city. The Adler Planetarium hosts regular lakefront stargazing events. Indiana Dunes on the south shore of Lake Michigan offers a darker horizon.
Does Lake Michigan affect stargazing in Chicago?∨
Yes — in both directions. Lake-effect clouds are common in autumn and winter, but the dark water provides a low-light-pollution horizon to the east. Summer offshore breezes can keep the city sky clearer than inland areas.
When is the best time to stargaze in Chicago?∨
Summer and early autumn offer the most reliable clear skies. Winter can be very clear during high-pressure systems, but lake-effect cloud cover is unpredictable.