Dark Sky Odds

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

January is the best month for stargazing at Hallingskarvet National Park: on average 13 clear, moonless hours of full darkness, and 6% of nights have at least two of them (ERA5, 2006–2025). The darkest spot we found there is darker than 93% 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 · Norway

JanuaryBest month
53Clear moonless dark hours a year
93%darker than … of Europe’s land
6%Nights with ≥ 2 such hours (January)

Month by month

MonthNights with ≥ 2 such hoursClear moonless dark hoursMoonless dark hoursOf them clear
January6%131877%
February5%61444%
March4%71126%
April4%43012%
May0%00—
June0%00—
July0%00—
August1%1127%
September5%6916%
October6%91466%
November2%31772%
December4%51893%

No astronomical darkness (May, June, July): the Sun stays above −18° all night.

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 than93% of Europe’s land
Light pollutionvery dark (darkest 5–20 %)
Sky-glow index (own, VIIRS) — Darkest spot we found0.17
Sky-glow index (own, VIIRS) — at the official map point0.19
Sky-glow index (own, VIIRS) — median across the area0.23
Darkest spot we found60.675, 7.758 (map) — within 12 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 202611.02%
9 December 20268–9 December 202612.54%
7 January 20277–8 January 202712.36%
6 February 20276–7 February 202710.85%
8 March 20277–8 March 20278.24%
6 April 20276–7 April 20274.34%
6 May 20275–6 May 20270.00%
4 June 20274–5 June 20270.00%
4 July 20273–4 July 20270.00%
2 August 20271–2 August 20270.01%
31 August 202731 August 2027 – 1 September 20273.51%
30 September 202729–30 September 20277.55%

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 202610%55%7.551°
Geminids *13–14 December 20267%20%12.062°
Geminids *14–15 December 20265%28%10.562°
Quadrantids3–4 January 20277%13%14.374°
Lyrids *22–23 April 202728%95%1.758°
Lyrids *23–24 April 202725%90%3.258°
Eta Aquariids *5–6 May 202712%0%2.0-6°
Eta Aquariids *6–7 May 202710%0%1.7-7°
Perseids *12–13 August 20277%84%3.360°
Perseids *13–14 August 20278%90%2.260°
Orionids21–22 October 20270%58%1.845°
Leonids *17–18 November 202710%82%0.551°
Leonids *18–19 November 202712%73%2.251°
Geminids14–15 December 20275%98%0.062°

* 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