Dark Sky Odds

Stargazing at Tomorr Mountain National Park: when is the sky clear and dark?

August is the best month for stargazing at Tomorr Mountain National Park: on average 81 clear, moonless hours of full darkness, and 56% of nights have at least two of them (ERA5, 2006–2025). The darkest spot we found there is darker than 68% 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 · Albania

AugustBest month
592Clear moonless dark hours a year
68%darker than … of Europe’s land
56%Nights with ≥ 2 such hours (August)

Month by month

MonthNights with ≥ 2 such hoursClear moonless dark hoursMoonless dark hoursOf them clear
January21%3517220%
February24%4115028%
March26%4213831%
April29%3911135%
May26%309232%
June35%417753%
July54%678480%
August56%8111074%
September36%5812846%
October34%5815836%
November28%4816728%
December28%5118827%

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 than68% of Europe’s land
Light pollutiondark rural sky (darkest 20–50 %)
Sky-glow index (own, VIIRS) — Darkest spot we found1.41
Sky-glow index (own, VIIRS) — at the official map point2.48
Sky-glow index (own, VIIRS) — median across the area2.52
Darkest spot we found40.692, 20.225 (map) — within 9.1 km of the Wikidata point (no OSM boundary)

Next new moons

New moonNightMoonless dark hours that nightTypical share of good nights that month
9 November 20268–9 November 202610.728%
9 December 20268–9 December 202611.528%
7 January 20277–8 January 202711.321%
6 February 20276–7 February 202710.724%
8 March 20277–8 March 20279.526%
6 April 20276–7 April 20277.829%
6 May 20276–7 May 20276.326%
4 June 20274–5 June 20275.035%
4 July 20273–4 July 20274.854%
2 August 20271–2 August 20276.056%
31 August 202731 August 2027 – 1 September 20277.556%
30 September 202729–30 September 20279.236%

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 202645%54%6.270°
Geminids *13–14 December 202643%20%9.782°
Geminids *14–15 December 202640%28%8.882°
Quadrantids3–4 January 202740%13%11.065°
Lyrids22–23 April 202742%95%1.283°
Eta Aquariids *5–6 May 202747%0%7.722°
Eta Aquariids *6–7 May 202748%0%7.723°
Perseids *12–13 August 202787%84%3.266°
Perseids *13–14 August 202790%90%2.266°
Orionids21–22 October 202753%59%3.565°
Leonids *17–18 November 202745%82%1.870°
Leonids *18–19 November 202742%73%3.270°
Geminids14–15 December 202740%98%0.082°

* 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