Aurora Borealis in Järvenpää
Finland · 60.47°, 25.09° · geomagnetic 58.0° · needs Kp 7
Tonight's aurora forecast for Järvenpää
29%
Peak chance of a visible display tonight, from the same model the Revon app runs. Järvenpää needs Kp 7 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.
Get the full 30-night forecast in Revon
Updated 2026-09-08 10:35 UTC
Local aurora guide for Järvenpää
Järvenpää is located at 58.0° geomagnetic latitude. Auroras are typically visible at this latitude during periods of strong geomagnetic activity, specifically when the Kp index reaches 7.
On average, there are about 2.3 nights per year in this region where conditions are suitable for aurora viewing. These opportunities are spread across the period from 2016 to 2026.
The best months for aurora viewing in Järvenpää are September, November, and March. These months offer a good balance of darkness and potential aurora activity.
During May, June, July, and August, the region experiences periods without full darkness, which can significantly reduce the visibility of the aurora.
Järvenpää experiences a Bortle 7 sky, indicating significant light pollution. For darker skies, Bortle 4 conditions can be found approximately 64 km south-east near Porvoo, and Bortle 5 conditions are available about 23 km east near Askola.
Local terrain features include Lemmenlaakso Luonnonsuojelualue, a reserve 3.4 km east, and Kiilahännänkallio, a hill 3.8 km north-north-west. Other notable features include Pihtikallio hill (4.1 km north-north-east), Sorsalammi lake (12.4 km west-north-west), and Pitkälampi lake (13.4 km north-north-east).
Between 2015 and 2016, there were 41 verified aurora reports within 300 km of Järvenpää. The period of record for viable aurora nights spans from April 2, 2016, to March 30, 2026.
Notable qualifying nights with high Kp values include March 20, 2026 (Kp 7.0), January 20, 2026 (Kp 7.67), January 19, 2026 (Kp 8.67), 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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