Round Lake, IL — light pollution & stargazing

Illinois · Poor — bright suburban · population 18,461

Round Lake, Illinois has a light-pollution rating of about Bortle 6 — a bright suburban sky (poor — bright suburban) — measured from VIIRS 2024 satellite night-lights at 16 nW/cm²/sr at the town center. The Milky Way is effectively invisible and the sky has a grayish glow near the horizon. Bright star clusters and the Moon and planets are the reliable targets; galaxies need a telescope. The nearest genuinely darker skies are around Salem, WI (about 14 mi away, Bortle 5). Tonight's Moon phase, cloud cover, and aurora odds load live below, computed in your browser. This is a satellite upward-radiance proxy for planning, not a survey-grade sky-brightness measurement.

Stargazing in Round Lake tonight

Light-pollution reading Round Lake, IL · VIIRS 2024
Estimated Bortle class
6 of 9

Bright suburban sky. A satellite upward-radiance proxy for planning — not a survey-grade sky-brightness reading.

VIIRS radiance (town center)
16 nW/cm²/sr
Naked-eye limiting mag.
5.1–5.5
Milky Way
not visible

What you can see from Round Lake

The Milky Way is effectively invisible and the sky has a grayish glow near the horizon. Bright star clusters and the Moon and planets are the reliable targets; galaxies need a telescope.

Darker skies within reach

The nearest town in each darker class — your ladder from Round Lake's sky toward truly dark skies.

Nearer, darker towns from Round Lake — nearest first.
Town State Bortle Sky Drive
Salem WI 5 Suburban sky 14 mi
Caledonia WI 4 Rural / suburban transition 33 mi

Frequently asked questions

Can you see the Milky Way from Round Lake, IL?
Not really. At about Bortle 6 the Milky Way is not visible from Round Lake — the sky is too light-polluted. The nearest genuinely dark skies are around Salem, WI, about 14 mi away.
How dark is the sky in Round Lake?
Round Lake rates a bright suburban sky — about Bortle 6, with a naked-eye limiting magnitude around 5.1–5.5. That comes from a VIIRS satellite night-lights reading of 16 nW/cm²/sr at the town center. It is a satellite proxy for planning, not a survey-grade measurement.
Where is the nearest dark sky to Round Lake?
The nearest town with genuinely darker skies is Salem, WI — about 14 mi away at roughly Bortle 5. See the "darker skies within reach" list on this page for more options.
Can I see the aurora from Round Lake tonight?
It depends on tonight's space weather. The live panel on this page reads the current NOAA aurora forecast for your latitude, along with cloud cover and the Moon — most U.S. locations only see aurora during strong geomagnetic storms.
How to read this rating

The darkness rating is measured from VIIRS satellite night-lights at the town center and is a proxy for planning, not a survey-grade sky-brightness measurement — and the darkest skies are usually a short drive out of any town. Tonight's Moon, cloud, and aurora figures are live third-party forecasts that can change. See the methodology for sources and limits.

More in Illinois

See every town's darkness rating in Illinois, learn to read the Bortle scale, or check tonight's Moon phase.