# Horas de oscuridad y cielos despejados, por base y mes

Canonical: https://northernlightsindex.com/es/tours-de-auroras-boreales/mejor-mes-por-base/

Dos cifras por base y mes, y las dos son nuestras. Cuántas horas pasa el sol más de doce grados por debajo del horizonte, y con qué frecuencia un observador en la estación meteorológica de esa base vio de verdad un cielo despejado en esas horas.

Seis bases: Tromsø, Rovaniemi, Reikiavik, Kiruna, Yellowknife y Fairbanks. Una estación meteorológica por base, todas a menos de 10 km, y la estación va nombrada en cada fila.

Las horas de oscuridad salen de la posición del sol y no necesitan licencia. El porcentaje de cielo despejado es nubosidad observada de la Integrated Surface Database de la NOAA, una obra del gobierno de Estados Unidos en dominio público.

Un mes con menos de 200 observaciones en horas de oscuridad recibe su cifra de horas de oscuridad y ningún porcentaje de nubes, en lugar de un porcentaje calculado con un puñado de horas. Por eso las filas de verano están en parte en blanco en las bases del norte.

Una búsqueda de auroras necesita dos cosas del cielo antes de que nada más pueda salir bien: que esté oscuro y que esté despejado. Las dos varían por base y por mes de formas que ninguna página de reserva te va a contar, y las dos se pueden calcular sin permiso de nadie.

Las horas de oscuridad son aritmética. La posición del sol se calcula con la fecha y las coordenadas de la estación, y la cifra es la media de horas al día con el sol por debajo de los menos doce grados, el punto en que el cielo está lo bastante oscuro para que una aurora débil se distinga. El porcentaje de cielo despejado es observado: de las observaciones horarias que caen dentro de esas horas de oscuridad, la proporción en que el observador de esa estación registró dos octavos de nube o menos. Diez años, de 2015 a 2024.

Lo que esto no es: una previsión, ni una probabilidad de ver la aurora. La oscuridad y el cielo despejado son necesarios para un avistamiento. La actividad solar, de la que esta página no dice nada, decide si hay algo que ver cuando ya los tienes.

## Destinations

- [Tromsø](https://northernlightsindex.com/es/tours-de-auroras-boreales/tromso/): 25 tours · from $81
- [Rovaniemi](https://northernlightsindex.com/es/tours-de-auroras-boreales/rovaniemi/): 49 tours · from $88
- [Reikiavik](https://northernlightsindex.com/es/tours-de-auroras-boreales/reikiavik/)

Source: noaa-isd-pds.s3.amazonaws.com. 72 rows, checked 2026-10-28.

Las horas de oscuridad se calculan con la posición del sol en las coordenadas de la estación. El porcentaje de cielo despejado es nubosidad observada en esas horas, de 2015 a 2024, en la estación nombrada en la fila.

| Base | Mes | Horas de oscuridad al día | Cielo despejado | Medio despejado o mejor | Observaciones | Estación | km desde la base | Read from | Checked |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| Fairbanks | January | 14.36 | 59.1 | 82.9 | 2377 | FAIRBANKS INTERNATIONAL | 8.4 | https://noaa-isd-pds.s3.amazonaws.com/isd-history.csv | 2026-10-28 |
| Fairbanks | February | 11.91 | 58.5 | 78.2 | 1810 | FAIRBANKS INTERNATIONAL | 8.4 | https://noaa-isd-pds.s3.amazonaws.com/isd-history.csv | 2026-10-28 |
| Fairbanks | March | 8.87 | 55.9 | 78.7 | 1437 | FAIRBANKS INTERNATIONAL | 8.4 | https://noaa-isd-pds.s3.amazonaws.com/isd-history.csv | 2026-10-28 |
| Fairbanks | April | 4.24 | 55.5 | 83.9 | 553 | FAIRBANKS INTERNATIONAL | 8.4 | https://noaa-isd-pds.s3.amazonaws.com/isd-history.csv | 2026-10-28 |
| Fairbanks | May | 0 |  |  | 0 | FAIRBANKS INTERNATIONAL | 8.4 | https://noaa-isd-pds.s3.amazonaws.com/isd-history.csv | 2026-10-28 |
| Fairbanks | June | 0 |  |  | 0 | FAIRBANKS INTERNATIONAL | 8.4 | https://noaa-isd-pds.s3.amazonaws.com/isd-history.csv | 2026-10-28 |
| Fairbanks | July | 0 |  |  | 0 | FAIRBANKS INTERNATIONAL | 8.4 | https://noaa-isd-pds.s3.amazonaws.com/isd-history.csv | 2026-10-28 |
| Fairbanks | August | 0 |  |  | 94 | FAIRBANKS INTERNATIONAL | 8.4 | https://noaa-isd-pds.s3.amazonaws.com/isd-history.csv | 2026-10-28 |
| Fairbanks | September | 6.96 | 34.1 | 60.7 | 891 | FAIRBANKS INTERNATIONAL | 8.4 | https://noaa-isd-pds.s3.amazonaws.com/isd-history.csv | 2026-10-28 |
| Fairbanks | October | 10.57 | 41.4 | 66.8 | 1522 | FAIRBANKS INTERNATIONAL | 8.4 | https://noaa-isd-pds.s3.amazonaws.com/isd-history.csv | 2026-10-28 |
| Fairbanks | November | 13.45 | 45.9 | 67.3 | 1635 | FAIRBANKS INTERNATIONAL | 8.4 | https://noaa-isd-pds.s3.amazonaws.com/isd-history.csv | 2026-10-28 |
| Fairbanks | December | 14.98 | 53.5 | 74.3 | 2181 | FAIRBANKS INTERNATIONAL | 8.4 | https://noaa-isd-pds.s3.amazonaws.com/isd-history.csv | 2026-10-28 |
| Kiruna | January | 14.85 | 92.7 | 92.7 | 931 | KIRUNA | 0.4 | https://noaa-isd-pds.s3.amazonaws.com/isd-history.csv | 2026-10-28 |
| Kiruna | February | 11.99 | 96.3 | 96.3 | 729 | KIRUNA | 0.4 | https://noaa-isd-pds.s3.amazonaws.com/isd-history.csv | 2026-10-28 |
| Kiruna | March | 8.46 | 95.6 | 95.6 | 751 | KIRUNA | 0.4 | https://noaa-isd-pds.s3.amazonaws.com/isd-history.csv | 2026-10-28 |
| Kiruna | April | 1.94 |  |  | 182 | KIRUNA | 0.4 | https://noaa-isd-pds.s3.amazonaws.com/isd-history.csv | 2026-10-28 |
| Kiruna | May | 0 |  |  | 0 | KIRUNA | 0.4 | https://noaa-isd-pds.s3.amazonaws.com/isd-history.csv | 2026-10-28 |
| Kiruna | June | 0 |  |  | 0 | KIRUNA | 0.4 | https://noaa-isd-pds.s3.amazonaws.com/isd-history.csv | 2026-10-28 |
| Kiruna | July | 0 |  |  | 0 | KIRUNA | 0.4 | https://noaa-isd-pds.s3.amazonaws.com/isd-history.csv | 2026-10-28 |
| Kiruna | August | 0 |  |  | 39 | KIRUNA | 0.4 | https://noaa-isd-pds.s3.amazonaws.com/isd-history.csv | 2026-10-28 |
| Kiruna | September | 6.13 | 96.7 | 96.7 | 427 | KIRUNA | 0.4 | https://noaa-isd-pds.s3.amazonaws.com/isd-history.csv | 2026-10-28 |
| Kiruna | October | 10.44 | 93.5 | 93.5 | 781 | KIRUNA | 0.4 | https://noaa-isd-pds.s3.amazonaws.com/isd-history.csv | 2026-10-28 |
| Kiruna | November | 13.78 | 92.5 | 92.5 | 929 | KIRUNA | 0.4 | https://noaa-isd-pds.s3.amazonaws.com/isd-history.csv | 2026-10-28 |
| Kiruna | December | 15.59 | 88.7 | 88.7 | 849 | KIRUNA | 0.4 | https://noaa-isd-pds.s3.amazonaws.com/isd-history.csv | 2026-10-28 |
| Reykjavík | January | 14.26 | 15.7 | 25.7 | 1224 | REYKJAVIK | 0 | https://noaa-isd-pds.s3.amazonaws.com/isd-history.csv | 2026-10-28 |
| Reykjavík | February | 11.89 | 12.2 | 20.8 | 1116 | REYKJAVIK | 0 | https://noaa-isd-pds.s3.amazonaws.com/isd-history.csv | 2026-10-28 |
| Reykjavík | March | 8.95 | 16.3 | 26.5 | 838 | REYKJAVIK | 0 | https://noaa-isd-pds.s3.amazonaws.com/isd-history.csv | 2026-10-28 |
| Reykjavík | April | 4.55 | 12.9 | 24 | 404 | REYKJAVIK | 0 | https://noaa-isd-pds.s3.amazonaws.com/isd-history.csv | 2026-10-28 |
| Reykjavík | May | 0 |  |  | 0 | REYKJAVIK | 0 | https://noaa-isd-pds.s3.amazonaws.com/isd-history.csv | 2026-10-28 |
| Reykjavík | June | 0 |  |  | 0 | REYKJAVIK | 0 | https://noaa-isd-pds.s3.amazonaws.com/isd-history.csv | 2026-10-28 |
| Reykjavík | July | 0 |  |  | 0 | REYKJAVIK | 0 | https://noaa-isd-pds.s3.amazonaws.com/isd-history.csv | 2026-10-28 |
| Reykjavík | August | 0 |  |  | 194 | REYKJAVIK | 0 | https://noaa-isd-pds.s3.amazonaws.com/isd-history.csv | 2026-10-28 |
| Reykjavík | September | 7.11 | 15.6 | 26.4 | 621 | REYKJAVIK | 0 | https://noaa-isd-pds.s3.amazonaws.com/isd-history.csv | 2026-10-28 |
| Reykjavík | October | 10.59 | 13.5 | 22.5 | 1156 | REYKJAVIK | 0 | https://noaa-isd-pds.s3.amazonaws.com/isd-history.csv | 2026-10-28 |
| Reykjavík | November | 13.38 | 14.2 | 27.1 | 1140 | REYKJAVIK | 0 | https://noaa-isd-pds.s3.amazonaws.com/isd-history.csv | 2026-10-28 |
| Reykjavík | December | 14.86 | 15.3 | 27.5 | 1373 | REYKJAVIK | 0 | https://noaa-isd-pds.s3.amazonaws.com/isd-history.csv | 2026-10-28 |
| Rovaniemi | January | 14.63 | 32 | 34 | 1337 | ROVANIEMI | 0.6 | https://noaa-isd-pds.s3.amazonaws.com/isd-history.csv | 2026-10-28 |
| Rovaniemi | February | 11.96 | 23.4 | 25.1 | 952 | ROVANIEMI | 0.6 | https://noaa-isd-pds.s3.amazonaws.com/isd-history.csv | 2026-10-28 |
| Rovaniemi | March | 8.65 | 35.7 | 38.3 | 652 | ROVANIEMI | 0.6 | https://noaa-isd-pds.s3.amazonaws.com/isd-history.csv | 2026-10-28 |
| Rovaniemi | April | 3.17 |  |  | 119 | ROVANIEMI | 0.6 | https://noaa-isd-pds.s3.amazonaws.com/isd-history.csv | 2026-10-28 |
| Rovaniemi | May | 0 |  |  | 0 | ROVANIEMI | 0.6 | https://noaa-isd-pds.s3.amazonaws.com/isd-history.csv | 2026-10-28 |
| Rovaniemi | June | 0 |  |  | 0 | ROVANIEMI | 0.6 | https://noaa-isd-pds.s3.amazonaws.com/isd-history.csv | 2026-10-28 |
| Rovaniemi | July | 0 |  |  | 0 | ROVANIEMI | 0.6 | https://noaa-isd-pds.s3.amazonaws.com/isd-history.csv | 2026-10-28 |
| Rovaniemi | August | 0 |  |  | 44 | ROVANIEMI | 0.6 | https://noaa-isd-pds.s3.amazonaws.com/isd-history.csv | 2026-10-28 |
| Rovaniemi | September | 6.51 | 17.6 | 18.4 | 414 | ROVANIEMI | 0.6 | https://noaa-isd-pds.s3.amazonaws.com/isd-history.csv | 2026-10-28 |
| Rovaniemi | October | 10.5 | 18.5 | 20.7 | 855 | ROVANIEMI | 0.6 | https://noaa-isd-pds.s3.amazonaws.com/isd-history.csv | 2026-10-28 |
| Rovaniemi | November | 13.64 | 22.1 | 23.2 | 1411 | ROVANIEMI | 0.6 | https://noaa-isd-pds.s3.amazonaws.com/isd-history.csv | 2026-10-28 |
| Rovaniemi | December | 15.32 | 32.5 | 35.2 | 1223 | ROVANIEMI | 0.6 | https://noaa-isd-pds.s3.amazonaws.com/isd-history.csv | 2026-10-28 |
| Tromsø | January | 15.22 | 35 | 40.2 | 3338 | TROMSO | 0.3 | https://noaa-isd-pds.s3.amazonaws.com/isd-history.csv | 2026-10-28 |
| Tromsø | February | 12.05 | 29 | 34.2 | 2501 | TROMSO | 0.3 | https://noaa-isd-pds.s3.amazonaws.com/isd-history.csv | 2026-10-28 |
| Tromsø | March | 8.14 | 27.4 | 32.4 | 1688 | TROMSO | 0.3 | https://noaa-isd-pds.s3.amazonaws.com/isd-history.csv | 2026-10-28 |
| Tromsø | April | 0 | 26.7 | 32.7 | 202 | TROMSO | 0.3 | https://noaa-isd-pds.s3.amazonaws.com/isd-history.csv | 2026-10-28 |
| Tromsø | May | 0 |  |  | 0 | TROMSO | 0.3 | https://noaa-isd-pds.s3.amazonaws.com/isd-history.csv | 2026-10-28 |
| Tromsø | June | 0 |  |  | 0 | TROMSO | 0.3 | https://noaa-isd-pds.s3.amazonaws.com/isd-history.csv | 2026-10-28 |
| Tromsø | July | 0 |  |  | 0 | TROMSO | 0.3 | https://noaa-isd-pds.s3.amazonaws.com/isd-history.csv | 2026-10-28 |
| Tromsø | August | 0 |  |  | 3 | TROMSO | 0.3 | https://noaa-isd-pds.s3.amazonaws.com/isd-history.csv | 2026-10-28 |
| Tromsø | September | 5.43 | 32.3 | 36.7 | 1050 | TROMSO | 0.3 | https://noaa-isd-pds.s3.amazonaws.com/isd-history.csv | 2026-10-28 |
| Tromsø | October | 10.34 | 30.1 | 34.5 | 2420 | TROMSO | 0.3 | https://noaa-isd-pds.s3.amazonaws.com/isd-history.csv | 2026-10-28 |
| Tromsø | November | 14.03 | 29.4 | 34.4 | 3024 | TROMSO | 0.3 | https://noaa-isd-pds.s3.amazonaws.com/isd-history.csv | 2026-10-28 |
| Tromsø | December | 16.06 | 26.1 | 31.8 | 3430 | TROMSO | 0.3 | https://noaa-isd-pds.s3.amazonaws.com/isd-history.csv | 2026-10-28 |
| Yellowknife | January | 14.04 | 59.9 | 72.7 | 2439 | YELLOWKNIFE | 3.9 | https://noaa-isd-pds.s3.amazonaws.com/isd-history.csv | 2026-10-28 |
| Yellowknife | February | 11.84 | 67.4 | 78.8 | 2223 | YELLOWKNIFE | 3.9 | https://noaa-isd-pds.s3.amazonaws.com/isd-history.csv | 2026-10-28 |
| Yellowknife | March | 9.12 | 70.2 | 81.6 | 1896 | YELLOWKNIFE | 3.9 | https://noaa-isd-pds.s3.amazonaws.com/isd-history.csv | 2026-10-28 |
| Yellowknife | April | 5.21 | 65.5 | 83.4 | 1036 | YELLOWKNIFE | 3.9 | https://noaa-isd-pds.s3.amazonaws.com/isd-history.csv | 2026-10-28 |
| Yellowknife | May | 0 |  |  | 13 | YELLOWKNIFE | 3.9 | https://noaa-isd-pds.s3.amazonaws.com/isd-history.csv | 2026-10-28 |
| Yellowknife | June | 0 |  |  | 0 | YELLOWKNIFE | 3.9 | https://noaa-isd-pds.s3.amazonaws.com/isd-history.csv | 2026-10-28 |
| Yellowknife | July | 0 |  |  | 0 | YELLOWKNIFE | 3.9 | https://noaa-isd-pds.s3.amazonaws.com/isd-history.csv | 2026-10-28 |
| Yellowknife | August | 2.35 | 50.2 | 71.1 | 478 | YELLOWKNIFE | 3.9 | https://noaa-isd-pds.s3.amazonaws.com/isd-history.csv | 2026-10-28 |
| Yellowknife | September | 7.44 | 59.4 | 77.3 | 1328 | YELLOWKNIFE | 3.9 | https://noaa-isd-pds.s3.amazonaws.com/isd-history.csv | 2026-10-28 |
| Yellowknife | October | 10.64 | 37 | 48.8 | 1752 | YELLOWKNIFE | 3.9 | https://noaa-isd-pds.s3.amazonaws.com/isd-history.csv | 2026-10-28 |
| Yellowknife | November | 13.23 | 34 | 46.4 | 1742 | YELLOWKNIFE | 3.9 | https://noaa-isd-pds.s3.amazonaws.com/isd-history.csv | 2026-10-28 |
| Yellowknife | December | 14.6 | 50.4 | 65.3 | 2284 | YELLOWKNIFE | 3.9 | https://noaa-isd-pds.s3.amazonaws.com/isd-history.csv | 2026-10-28 |

## ¿Por qué menos doce grados y no la puesta de sol?

Porque al atardecer el cielo todavía está demasiado claro. Menos doce está dentro del crepúsculo náutico, aproximadamente el punto en que una aurora débil se distingue del fondo. Es un umbral que elegimos nosotros; si lo cambiamos, la cifra se recalcula, y la elección se declara aquí en vez de esconderse.

## ¿El porcentaje de cielo despejado es la probabilidad de ver auroras?

No, y tenemos cuidado de no presentarlo así. Es con qué frecuencia el cielo sobre esa estación estuvo despejado durante horas de oscuridad, promediado a diez años. Si la aurora está activa tu noche es otra pregunta que este sitio no responde.

## ¿Qué base sale mejor?

Depende del mes, que es justo el sentido de la tabla. Si ordenas por cielo despejado dentro de un mes, las bases de interior y continentales suelen ganar a las costeras; si ordenas por horas de oscuridad, las bases más al norte ganan en pleno invierno y pierden en los meses de transición.

## ¿Puedo reutilizar estas cifras?

Sí, con atribución y un enlace a la página de metodología. Las cifras de nubes derivan de observaciones de la NOAA en dominio público, y la licencia al final de la página de metodología cubre nuestras propias filas.

## Related

- [Tours de auroras que prometen una segunda noche: todas las políticas que pudimos leer](https://northernlightsindex.com/es/tours-de-auroras-boreales/politicas-de-garantia-y-segunda-salida/)

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