January delivers the crispest, clearest skies of the Finnish winter. It is the coldest month — −15 to −25°C is normal in Ruka — and that cold usually means dry, stable, cloud-free air, which is exactly what you want for aurora hunting. With 16–18 hours of darkness and snow at its deepest, January pairs world-class aurora odds with the full range of winter activities.
We run aurora tours from Ruka every night of the season, so this is what January in Finland actually looks like on the ground — not generic advice.
Aurora odds in January
In January, Ruka (latitude ~66°N) sits directly under the auroral oval, so even a quiet KP 1–2 night can produce visible green light. The coldest, clearest skies of winter tips the odds further in your favour. Our overall rating for the month: ★★★★★.
Coldest air brings the clearest skies; deep snow and maximum darkness.
Darkness & weather
- Darkness: 16–18 hours of darkness per night
- Typical temperature: −15 to −25°C
- Snow: deep and reliable
Cloud is the only real enemy of aurora hunting. Ruka and Kuusamo average over 200 clear aurora nights a year, and on cloudy nights we drive up to 150 km to find a clear window.
What to wear
Layer up: a merino or thermal base, a fleece mid-layer, and a windproof, waterproof outer shell. Add wool socks, insulated boots rated to −30°C, liner gloves under thick mittens, and a hat or balaclava. On our tours we also provide full thermal outerwear and boots.
How to see them
The surest way is a guided aurora hunting tour — we track the KP forecast and cloud cover in real time and move to wherever the sky is clearest. Prefer to go solo? Bookmark our live KP index & aurora forecast and head somewhere dark, away from resort lights, facing north.