YozoraAtlas

How dark is the sky in Salzburg?

Sky darkness for 4 towns and parks in Salzburg, worked out from NASA satellite images of light at night (2025). 3 of them have skies of Bortle 4 or darker, where the Milky Way shows overhead. The darkest is Riedingtal Nature Park (21.72, Bortle 3), the brightest Salzburg (19.43, Bortle 6). Milky Way season in Salzburg runs May to July: on moonless nights the bright core stands clear of the horizon, climbing to about 14° at its highest.

19 Bortle class, 1 pristine to 9 city center park or dark-sky place city

Numbers like 21.95 or 16.97 are the brightness of the sky overhead on a clear, moonless night, in mag/arcsec². The scale runs backwards: a lower number means a brighter sky, from about 22 for a natural sky to about 17 in a city center.
How the readings are made

NASA satellite night-lights map of Salzburg with every place marked

Darkest skies in Salzburg

  1. Riedingtal Nature ParkBortle 321.72
  2. Hohe Tauern National ParkBortle 321.70
  3. WeißbachBortle 421.55

Among the places on this site. Plenty of land between them is just as dark, with no town or park to name it by.

Brightest city skies in Salzburg

  1. SalzburgBortle 619.43

All 4 places in Salzburg

Amber names are parks and certified dark-sky places. The figure is the Bortle class: 1 darkest, 9 city center.
Hohe Tauern National Park3Riedingtal Nature Park3Salzburg6Weißbach4