Dark Sky Odds

Stargazing at Hohe Tauern National Park: when is the sky clear and dark?

December is the best month for stargazing at Hohe Tauern National Park: on average 36 clear, moonless hours of full darkness, and 20% of nights have at least two of them (ERA5, 2006–2025). The darkest spot we found there is darker than 86% of Europe’s land (NASA VIIRS 2025).

Data updated: 31 December 2025 · Sources and licences

Calculated 5 November 2026 · cloud cover ERA5 2006–2025 · night lights NASA VIIRS 2025

national park · Austria

DecemberBest month
201Clear moonless dark hours a year
86%darker than … of Europe’s land
20%Nights with ≥ 2 such hours (December)

Month by month

MonthNights with ≥ 2 such hoursClear moonless dark hoursMoonless dark hoursOf them clear
January14%2418014%
February19%2514517%
March15%2513618%
April12%149814%
May4%5648%
June4%43910%
July6%65611%
August8%119411%
September10%121249%
October12%1615411%
November16%2416814%
December20%3617620%

Climate, not a forecast: these are shares of past nights (ERA5 reanalysis, 2006–2025), not a prediction for a particular night. Check a forecast before you go.

Light pollution

Darker than86% of Europe’s land
Light pollutionvery dark (darkest 5–20 %)
Sky-glow index (own, VIIRS) — Darkest spot we found0.36
Sky-glow index (own, VIIRS) — at the official map point0.50
Sky-glow index (own, VIIRS) — median across the area0.56
Darkest spot we found47.042, 13.358 (map) — within the OSM boundary

Next new moons

New moonNightMoonless dark hours that nightTypical share of good nights that month
9 November 20268–9 November 202610.816%
9 December 20268–9 December 202611.720%
7 January 20277–8 January 202711.714%
6 February 20276–7 February 202710.719%
8 March 20277–8 March 20279.215%
6 April 20276–7 April 20277.212%
6 May 20275–6 May 20275.04%
4 June 20274–5 June 20272.74%
4 July 20273–4 July 20272.56%
2 August 20271–2 August 20274.78%
31 August 202731 August 2027 – 1 September 20277.08%
30 September 202729–30 September 20278.810%

Hours with the Sun below −18° and the Moon below the horizon, on the night of the new moon, at the darkest spot.

Meteor showers

ShowerPeak nightChance of a clear peak nightMoon litMoonless dark hours (Sun < −12°)Radiant max. height
Leonids17–18 November 202630%55%6.564°
Geminids *13–14 December 202627%20%10.376°
Geminids *14–15 December 202623%28%9.276°
Quadrantids3–4 January 202717%13%11.770°
Lyrids22–23 April 202723%95%1.377°
Eta Aquariids *5–6 May 202715%0%6.715°
Eta Aquariids *6–7 May 202718%0%6.716°
Perseids *12–13 August 202715%84%3.267°
Perseids *13–14 August 202712%90%2.268°
Orionids21–22 October 202715%59%3.359°
Leonids *17–18 November 202730%82%1.764°
Leonids *18–19 November 202727%73%3.264°
Geminids14–15 December 202723%98%0.076°

* The peak falls in daylight in Europe, so both neighbouring nights are shown.

Clear peak night: at least 2 hours with ≤ 20 % cloud while the Sun is below −12°, on the same calendar night ± 1 in 2006–2025.

How we calculate