8 of 12 destinations scored for northern lights are prime in September — 80 or better on conditions alone. Highest: Churchill (88), Iceland (87), Yellowknife (87). In August 0 are prime; in October, 9.
Every destination scoring 55 or better for northern lights in September, highest first. Ties are listed alphabetically.
Most places have one or two months that are genuinely better — and a booking moment that comes a lot earlier than the trip. I’ll write when one of those is coming up. No schedule, no filler.
Somewhere missing from the list? Write to info@pennyswindow.com and I’ll score it.