{
 "destination": "Rovaniemi",
 "lat": 66.5,
 "lon": 25.75,
 "history": {
  "dark_hours": {
   "9": 6,
   "10": 11,
   "11": 14,
   "12": 16,
   "1": 14,
   "2": 12,
   "3": 8
  },
  "airport": {
   "station": "EFRO",
   "name": "Rovaniemi Airport",
   "months": {
    "9": {
     "nights": 299,
     "share": 0.505
    },
    "10": {
     "nights": 310,
     "share": 0.419
    },
    "11": {
     "nights": 300,
     "share": 0.427
    },
    "12": {
     "nights": 310,
     "share": 0.49
    },
    "1": {
     "nights": 310,
     "share": 0.613
    },
    "2": {
     "nights": 282,
     "share": 0.553
    },
    "3": {
     "nights": 310,
     "share": 0.652
    }
   },
   "nights": 2121,
   "share": 0.523,
   "seasons": [
    "2016-17",
    "2017-18",
    "2018-19",
    "2019-20",
    "2020-21",
    "2021-22",
    "2022-23",
    "2023-24",
    "2024-25",
    "2025-26"
   ]
  }
 },
 "tonight": {
  "state": "forecast",
  "night": "2026-10-30",
  "issued": true,
  "issued_at": "2026-10-30T14:08:02.564Z",
  "probability": 40,
  "label": "possible",
  "confidence": "medium",
  "confidence_reason": "edge_band",
  "reasons": [
   "bright_moon",
   "quiet_activity"
  ],
  "best_viewing_hours": {
   "start": "18:00",
   "end": "21:00",
   "tz": "Europe/Helsinki",
   "start_at": "2026-10-30T16:00:00.000Z",
   "end_at": "2026-10-30T19:00:00.000Z"
  },
  "cloud_cover": 69,
  "fetched_at": "2026-10-30T14:13:31Z",
  "model_version": "planv2_lr-mm2-2026-10-26",
  "cell": "66.50_25.75"
 },
 "moon_free_windows": [
  {
   "start": "2026-11-01",
   "end": "2026-11-19",
   "max_moon_free_dark_hours": 14
  },
  {
   "start": "2026-11-29",
   "end": "2026-12-18",
   "max_moon_free_dark_hours": 16
  },
  {
   "start": "2026-12-27",
   "end": "2027-01-15",
   "max_moon_free_dark_hours": 16
  },
  {
   "start": "2027-01-25",
   "end": "2027-02-12",
   "max_moon_free_dark_hours": 13
  },
  {
   "start": "2027-02-24",
   "end": "2027-03-12",
   "max_moon_free_dark_hours": 11
  },
  {
   "start": "2027-03-25",
   "end": "2027-03-31",
   "max_moon_free_dark_hours": 7
  }
 ],
 "sources": [
  "UEC Tromsø AI dataset (Nanjo et al. 2022)",
  "Iowa Environmental Mesonet METAR archive",
  "MET Norway (CC BY 4.0)",
  "NOAA SWPC",
  "GFZ Potsdam (CC BY 4.0)",
  "PyEphem"
 ],
 "license": "CC BY 4.0, https://creativecommons.org/licenses/by/4.0/ (credit: Aurora by Sterk Vekst, with a link)",
 "definitions": "https://aurora.report/methodology/",
 "generated": "2026-10-30"
}