Fairbanks vs Rovaniemi for the northern lights
Fairbanks wins on the numbers: a viewing window on 39% of season nights against 21% for Rovaniemi, peaking in January at 53%.
| Fairbanks | Rovaniemi | |
|---|---|---|
| Country | United States (Alaska) | Finland |
| Solar activity needed (Kp threshold — lower is better) | 2 | 2.5 |
| Season length (months with dark skies) | 9 | 9 |
| Best month | January (53%) | March (36%) |
| Season-average viewing nights | 39% | 21% |
| Clear-night share across the season | 49% | 34% |
Month by month
Two different trips
Fairbanks — North America’s aurora basecamp
Fairbanks sits under the auroral oval in Alaska’s dry interior — far from coastal cloud, with long, cold, clear winter nights. The University of Alaska has studied the aurora here for over a century.
Rovaniemi — Santa’s hometown under the lights
Rovaniemi sits right on the Arctic Circle, a little south of the auroral oval’s usual band — displays need moderate activity (Kp 2-3), but Lapland’s continental climate brings clearer, calmer winter nights than the Norwegian coast.