Dark Sky Odds

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

March is the best month for stargazing at Dalby Söderskog National Park: on average 33 clear, moonless hours of full darkness, and 22% of nights have at least two of them (ERA5, 2006–2025). The darkest spot we found there is darker than 6% 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 · Sweden

MarchBest month
180Clear moonless dark hours a year
6%darker than … of Europe’s land
22%Nights with ≥ 2 such hours (March)

Month by month

MonthNights with ≥ 2 such hoursClear moonless dark hoursMoonless dark hoursOf them clear
January12%1818510%
February13%1814412%
March22%3312427%
April21%246835%
May0%1231%
June0%00—
July0%00—
August10%104623%
September16%2010619%
October15%2315115%
November12%1717110%
December10%162018%

No astronomical darkness (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 than6% of Europe’s land
Light pollutionstrong light pollution
Sky-glow index (own, VIIRS) — Darkest spot we found41
Sky-glow index (own, VIIRS) — at the official map point41
Sky-glow index (own, VIIRS) — median across the area41
Darkest spot we found55.675, 13.325 (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 202611.012%
9 December 20268–9 December 202612.210%
7 January 20277–8 January 202712.012%
6 February 20276–7 February 202710.813%
8 March 20277–8 March 20278.722%
6 April 20276–7 April 20275.821%
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 20270.010%
31 August 202731 August 2027 – 1 September 20275.310%
30 September 202729–30 September 20278.216%

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 202627%55%7.056°
Geminids *13–14 December 202610%20%11.267°
Geminids *14–15 December 202617%28%9.867°
Quadrantids3–4 January 202732%13%13.074°
Lyrids22–23 April 202758%95%1.365°
Eta Aquariids *5–6 May 202743%0%4.74°
Eta Aquariids *6–7 May 202742%0%4.75°
Perseids *12–13 August 202730%84%3.365°
Perseids *13–14 August 202732%90%2.266°
Orionids21–22 October 202715%59%2.550°
Leonids *17–18 November 202727%82%1.256°
Leonids *18–19 November 202723%73%2.756°
Geminids14–15 December 202717%98%0.067°

* 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