Dark Sky Odds

Stargazing at Tablas de Daimiel National Park: when is the sky clear and dark?

August is the best month for stargazing at Tablas de Daimiel National Park: on average 82 clear, moonless hours of full darkness, and 55% 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 · Spain

AugustBest month
727Clear moonless dark hours a year
57%darker than … of Europe’s land
55%Nights with ≥ 2 such hours (August)

Month by month

MonthNights with ≥ 2 such hoursClear moonless dark hoursMoonless dark hoursOf them clear
January33%5916935%
February39%6114243%
March34%5614239%
April30%4211437%
May34%449447%
June39%447658%
July57%769282%
August55%8211274%
September41%6513249%
October36%6215540%
November39%7016842%
December35%6617338%

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 found2.59
Sky-glow index (own, VIIRS) — at the official map point2.59
Sky-glow index (own, VIIRS) — median across the area2.81
Darkest spot we found39.142, -3.708 (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 202610.739%
9 December 20268–9 December 202611.335%
7 January 20277–8 January 202711.233%
6 February 20276–7 February 202710.539%
8 March 20277–8 March 20279.334%
6 April 20276–7 April 20278.030%
6 May 20275–6 May 20276.534%
4 June 20274–5 June 20275.339%
4 July 20273–4 July 20275.257%
2 August 20271–2 August 20276.255%
31 August 202731 August 2027 – 1 September 20277.755%
30 September 202729–30 September 20279.241%

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 202670%55%6.070°
Geminids *13–14 December 202643%20%9.784°
Geminids *14–15 December 202647%29%8.784°
Quadrantids3–4 January 202752%13%11.065°
Lyrids22–23 April 202745%95%1.285°
Eta Aquariids *5–6 May 202763%0%7.824°
Eta Aquariids *6–7 May 202755%1%7.824°
Perseids *12–13 August 202783%84%3.065°
Perseids *13–14 August 202783%90%2.066°
Orionids21–22 October 202752%58%3.867°
Leonids *17–18 November 202770%82%2.070°
Leonids *18–19 November 202773%72%3.372°
Geminids14–15 December 202747%98%0.084°

* 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