YozoraAtlas

How dark is the sky in Carinthia?

Sky darkness for 4 towns and parks in Carinthia, worked out from NASA satellite images of light at night (2025). 2 of them have skies of Bortle 4 or darker, where the Milky Way shows overhead. The darkest is Salzburger Lungau and Kärntner Nockberge Biosphere Reserve (21.75, Bortle 3), the brightest Klagenfurt am Wörthersee (19.83, Bortle 5). Milky Way season in Carinthia 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 Carinthia with every place marked

Darkest skies in Carinthia

  1. Salzburger Lungau and Kärntner Nockberge Biosphere ReserveBortle 321.75
  2. WolfsbergBortle 420.60

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 Carinthia

  1. Klagenfurt am WörtherseeBortle 519.83
  2. VillachBortle 520.06

All 4 places in Carinthia

Amber names are parks and certified dark-sky places. The figure is the Bortle class: 1 darkest, 9 city center.
Klagenfurt am Wörthersee5Salzburger Lungau and Kärntner Nockberge Biosphere Reserve3Villach5Wolfsberg4