Aurora Borealis in Riihimäki
Finland · 60.74°, 24.78° · geomagnetic 58.3° · needs Kp 5
Tonight's aurora forecast for Riihimäki
33%
Peak chance of a visible display tonight, from the same model the Revon app runs. Riihimäki 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.
Get the full 30-night forecast in Revon
Updated 2026-09-08 10:35 UTC
Local aurora guide for Riihimäki
Riihimäki is at 58.3° geomagnetic latitude. Auroras are typically visible here when the planetary Kp index reaches 5.
On average, there are 20.4 nights per year with conditions suitable for aurora viewing. The historical record spans from April 2, 2016, to March 30, 2026.
The best months for aurora viewing in Riihimäki are September, March, and October. During these months, the nights are dark enough to potentially see the aurora.
However, from May through August, there is not enough full darkness for aurora viewing due to the high latitude.
Riihimäki has a Bortle scale rating of 5, indicating a suburban sky brightness. Areas with less light pollution can enhance viewing.
Darker skies, such as Bortle 3, can be found 57 km north near Hämeenlinna. Closer to Riihimäki, Bortle 5 conditions extend to 2 km north-west.
Local terrain features include hills like Honkalanmäki (3.3 km NW) and Sipilänmäki (4.1 km W), and lakes such as Piirilammi (8.1 km NNE) and Vainolanlammi (8.5 km NE). Patakärki, a headland, is located 11.0 km NW.
Near Riihimäki, Honkalanmäki is a hill located 3.3 km to the north-west. Sipilänmäki, another hill, is situated 4.1 km to the west.
Bodies of water like Piirilammi lake are 8.1 km north-north-east, and Vainolanlammi lake is 8.5 km north-east. Patakärki, a headland, lies 11.0 km north-west of Riihimäki.
Between January 1, 2015, and December 31, 2016, there were 41 verified aurora reports within 300 km of Riihimäki.
The historical record shows qualifying nights occurred on March 20-24, 2026, with Kp values ranging from 5.0 to 7.0.
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
Know when it is worth going outside
Revon watches the Riihimäki 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 Riihimäki.