The Moon matters more than one band of difference

A full Moon washes out faint stars and the Milky Way even from a genuinely dark site, while a new Moon can make a Suburban-band sky noticeably better than usual. Checking a Moon-phase calendar for the week of a planned trip matters at least as much as the difference between this site's Suburban and Suburban edge bands.

Clear air beats a slightly darker band

Humidity, haze, and thin cloud scatter what light there is and wash out contrast even under a technically dark sky. A clear, dry night in a Suburban-band city can outperform a hazy night somewhere rated Rural. Check a real forecast, not just this site's figure, for anything time-sensitive like a meteor shower or a specific planet's visibility.

Give your eyes 20 to 30 minutes

Human night vision keeps improving for 20 to 30 minutes after the last bright light source, a phone screen included. Someone who checks their phone repeatedly under an otherwise dark sky never gets the full benefit of the band they drove to reach.

Elevation and horizon help too, and neither is in this dataset

Higher ground with a clear, low horizon outperforms a valley of the same measured radiance, because a light dome from a distant town sits along the horizon rather than overhead. Neither elevation nor horizon obstruction is part of this site's dataset, so two places with an identical brightness band can still give a genuinely different view.

Where to go next

See the range this plays out across: Truckee, CA, Roswell, NM, Oklahoma City, OK.

What This Dataset Does and Doesn't Cover · How DarkSkyCheck Measures Your City's Night Sky