Dark Sky Odds

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

March is the best month for stargazing at Børgefjell National Park: on average 8 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 57% 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

MarchBest month
30Clear moonless dark hours a year
57%darker than … of Europe’s land
6%Nights with ≥ 2 such hours (March)

Month by month

MonthNights with ≥ 2 such hoursClear moonless dark hoursMoonless dark hoursOf them clear
January4%61943%
February3%41413%
March6%8959%
April1%1610%
May0%00—
June0%00—
July0%00—
August0%00—
September2%3634%
October2%41403%
November2%31802%
December2%22051%

No astronomical darkness (May, June, July, August): 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 than57% of Europe’s land
Light pollutiondark rural sky (darkest 20–50 %)
Sky-glow index (own, VIIRS) — Darkest spot we found2.61
Sky-glow index (own, VIIRS) — at the official map point6.23
Sky-glow index (own, VIIRS) — median across the area5.67
Darkest spot we found65.275, 14.325 (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 202611.22%
9 December 20268–9 December 202613.02%
7 January 20277–8 January 202712.84%
6 February 20276–7 February 202710.73%
8 March 20277–8 March 20277.56%
6 April 20276–7 April 20270.71%
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 20270.00%
31 August 202731 August 2027 – 1 September 20270.00%
30 September 202729–30 September 20276.72%

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 20267%55%8.247°
Geminids *13–14 December 20265%20%13.058°
Geminids *14–15 December 20263%28%11.558°
Quadrantids3–4 January 20275%13%15.072°
Lyrids *22–23 April 20270%95%1.347°
Lyrids *23–24 April 2027—90%0.344°
Eta Aquariids *5–6 May 2027—0%0.0—
Eta Aquariids *6–7 May 2027—0%0.0—
Perseids *12–13 August 2027—84%0.0—
Perseids *13–14 August 2027—90%0.0—
Orionids21–22 October 20277%59%0.341°
Leonids *17–18 November 20277%82%0.047°
Leonids *18–19 November 20277%73%1.547°
Geminids14–15 December 20273%98%0.058°

* 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