Dark Sky Odds

Stargazing at OM Dark Sky Park & Observatory: when is the sky clear and dark?

March is the best month for stargazing at OM Dark Sky Park & Observatory: on average 15 clear, moonless hours of full darkness, and 11% of nights have at least two of them (ERA5, 2006–2025). The darkest spot we found there is darker than 65% 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

International Dark Sky Park · United Kingdom · DarkSky International

MarchBest month
91Clear moonless dark hours a year
65%darker than … of Europe’s land
11%Nights with ≥ 2 such hours (March)

Month by month

MonthNights with ≥ 2 such hoursClear moonless dark hoursMoonless dark hoursOf them clear
January8%121866%
February9%111467%
March11%1512512%
April12%137317%
May1%1612%
June0%00—
July0%00—
August2%2544%
September7%81098%
October9%111518%
November7%91745%
December6%91895%

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 than65% of Europe’s land
Light pollutiondark rural sky (darkest 20–50 %)
Sky-glow index (own, VIIRS) — Darkest spot we found1.72
Sky-glow index (own, VIIRS) — at the official map point1.80
Sky-glow index (own, VIIRS) — median across the area1.86
Darkest spot we found54.708, -6.908 (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 202611.07%
9 December 20268–9 December 202612.26%
7 January 20277–8 January 202712.08%
6 February 20276–7 February 202710.89%
8 March 20277–8 March 20278.811%
6 April 20276–7 April 20276.212%
6 May 20275–6 May 20271.71%
4 June 20274–5 June 20270.00%
4 July 20273–4 July 20270.00%
2 August 20271–2 August 20270.02%
31 August 202731 August 2027 – 1 September 20275.52%
30 September 202729–30 September 20278.27%

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 202613%55%6.857°
Geminids *13–14 December 202612%21%11.068°
Geminids *14–15 December 202610%29%9.868°
Quadrantids3–4 January 202717%13%13.073°
Lyrids22–23 April 202722%95%1.567°
Eta Aquariids *5–6 May 202722%0%5.06°
Eta Aquariids *6–7 May 202720%1%5.06°
Perseids *12–13 August 202713%84%3.366°
Perseids *13–14 August 202710%91%2.267°
Orionids21–22 October 202713%58%2.751°
Leonids17–18 November 202713%82%1.357°
Geminids14–15 December 202710%98%0.068°

* 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