Aurora Borealis in Fredericia
Denmark · 55.57°, 9.75° · geomagnetic 55.7° · needs Kp 7
Tonight's aurora forecast for Fredericia
8%
Peak chance of a visible display tonight, from the same model the Revon app runs. Fredericia needs Kp 7 to see anything at all, and tonight the forecast peaks at Kp 4.8. Short of the threshold, which is what most nights look like here.
Get the full 30-night forecast in Revon
Updated 2026-09-08 10:35 UTC
Local aurora guide for Fredericia
Fredericia generally needs planetary Kp 7 before the aurora borealis reaches the local sky. Historical Kp and darkness data produce about 2.5 viable nights a year across 10.0 years of records.
The strongest historical overlap of darkness and activity occurs in September, November and August. From May through July, limited astronomical darkness can prevent viewing.
The central sky is approximately Bortle 4.
Aurorasaurus recorded 7 verified reports within 300 km of Fredericia between 2015-01-01 and 2016-12-31. These records describe past observations, not tonight's prediction.
Sources: Revon analysis of NOAA planetary Kp · Solar declination and hour-angle calculation · Falchi 2016 World Atlas of artificial night sky brightness · Aurorasaurus verified positive reports
Know when it is worth going outside
Revon watches the Fredericia forecast and pushes an alert when the odds for tonight clear your threshold — no checking, no guessing.
Nearby towns
Forecasts for places within reach of Fredericia.