Aurora Borealis in Fort St. John

Canada · 56.25°, -120.85° · geomagnetic 61.7° · needs Kp 5

Tonight's aurora forecast for Fort St. John

46%

Peak chance of a visible display tonight, from the same model the Revon app runs. Fort St. John needs Kp 5 to see anything at all, and tonight the forecast peaks at Kp 4.7. Short of the threshold, which is what most nights look like here.

Tonight Mon 07 Sep
46%
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06

Get the full 30-night forecast in Revon

Updated 2026-09-08 10:35 UTC

Local aurora guide for Fort St. John

Fort St. John generally needs planetary Kp 5 before the aurora borealis reaches the local sky. Historical Kp and darkness data produce about 22.5 viable nights a year across 10.0 years of records.

The strongest historical overlap of darkness and activity occurs in September, March and October. From May through July, limited astronomical darkness can prevent viewing.

The central sky is approximately Bortle 5. The supplied darker-sky reference is 22 km east at Bortle 4.

Aurorasaurus recorded 6 verified reports within 300 km of Fort St. John 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

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Nearby towns

Forecasts for places within reach of Fort St. John.