Weather
Average highs sit around 11°C with lows near 5°C. Expect a fair amount of rain, so plan indoor backups.
Crowds & demand
Crowd levels are Moderate for Reykjavík — manageable crowds at the big attractions.
Prices & value
Prices run mid-range this month: prices close to the yearly average.
Events & what’s on
Look out for Northern Lights Season while you’re there.
- Northern Lights Season — Aurora borealis visible on clear dark nights away from city lights.
The verdict
September is a strong choice for Reykjavík: 11° / 5°, with manageable crowds at the big attractions and prices close to the yearly average.
Figures are climate normals and modelled estimates — a planning guide, not a forecast. We separate fact, estimate and recommendation. Updated July 2026
