Overview
A popular myth says the aurora only appears when it's bitterly cold. In truth, temperature doesn't cause the Northern Lights at all — but there's a reason the two are linked.
What really matters
The aurora depends on solar activity, darkness and clear skies — not the temperature. It can appear on a mild -2°C night or a bitter -30°C one.
Why cold nights seem better
The coldest nights are often the clearest (clear skies let heat escape, dropping temperatures). So you're more likely to see the aurora on a cold, clear night — but the cold isn't the cause.
The takeaway
Don't wait for extreme cold; watch for clear skies and solar activity. See our forecast guide.