Tromsø vs Fairbanks for the northern lights
Fairbanks wins on the numbers: a viewing window on 39% of season nights against 24% for Tromsø, peaking in January at 53%.
| Tromsø | Fairbanks | |
|---|---|---|
| Country | Norway | United States (Alaska) |
| Solar activity needed (Kp threshold — lower is better) | 1 | 2 |
| Season length (months with dark skies) | 9 | 9 |
| Best month | October (33%) | January (53%) |
| Season-average viewing nights | 24% | 39% |
| Clear-night share across the season | 25% | 49% |
Month by month
Two different trips
Tromsø — The aurora capital of the Arctic
Tromsø sits directly under the auroral oval, 350 km north of the Arctic Circle. Even on geomagnetically quiet nights the lights often appear overhead — the real question here is almost always the clouds, not the sun.
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.