Aurora Borealis in Katrineholm

Sweden · 59.00°, 16.21° · geomagnetic 57.9° · needs Kp 7

Tonight's aurora forecast for Katrineholm

39%

Peak chance of a visible display tonight, from the same model the Revon app runs. Katrineholm 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.

Tonight Tue 08 Sep
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Updated 2026-09-08 10:36 UTC

Local aurora guide for Katrineholm

Katrineholm is located at 57.9° geomagnetic latitude. Auroras visible here typically require a geomagnetic activity level of Kp 7 or higher.

On average, there are about 2.4 nights per year with conditions suitable for aurora viewing in this region. The historical record spans from April 2, 2016, to March 30, 2026.

The months of September, November, and March are historically the best for aurora viewing in Katrineholm.

During May, June, July, and August, the region experiences periods without full darkness, which can impact viewing conditions.

Katrineholm has a Bortle scale rating of 4, indicating a dark sky location. Areas with Bortle 4 conditions can be found approximately 2 km east of the town.

The surrounding terrain includes lakes such as Näsnaren and Storjälken to the northwest and east-northeast, respectively. Hills like Biemon and Skallberg are located to the north and east-northeast, with a bay named Norrviken further east-northeast.

Records indicate 29 verified aurora sightings within a 300 km radius of Katrineholm between January 1, 2015, and December 31, 2016.

Notable qualifying nights with high geomagnetic activity include March 20, 2026 (Kp 7.0), January 20, 2026 (Kp 7.67), and January 19, 2026 (Kp 8.67). Additional significant nights were November 12, 2025 (Kp 7.33) and November 11, 2025 (Kp 8.67).

Sources: Revon location dataset · Revon analysis of NOAA planetary Kp · Solar declination and hour-angle calculation · Falchi 2016 World Atlas of artificial night sky brightness · GeoNames (CC BY 4.0) · Aurorasaurus verified positive reports

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Nearby towns

Forecasts for places within reach of Katrineholm.