Daylight
12–14h
Sunrise ~06:50, sunset ~19:40 (Reykjavík, mid-Sep). Equinox ~Sep 22 gives equal day/night. Dark enough for aurora after ~21:00.
Weather
Iceland Weather in September: Aurora Returns & Autumn Colors
Early autumn: cooler air, fewer crowds, and the return of dark nights as aurora season begins again.
Temperatures
5 to 11°C (41–52°F)
Avg precipitation 66 mm, avg wind 18 km/h. First frosts at higher elevations. Weather still relatively stable early Sep. Equinox boosts geomagnetic activity.
Vibe
Aurora returns
Autumn colors and the first dark skies of the season.
Best for
- Northern lights season begins (equinox enhances geomagnetic storms)
- Autumn colours: reds, oranges, and yellows across the highlands and valleys
- Ring Road still fully accessible with fewer crowds than summer
- Whale watching (season runs through October)
- Hiking: Laugavegur, Fimmvörðuháls, and lowland trails still open
- Sheep roundup (réttir), an annual tradition in late September, sometimes open to visitors
Pack list
- Warm insulated midlayer + waterproof windproof shell
- Sturdy waterproof hiking boots
- Warm hat, gloves, and buff (especially for aurora viewing nights)
- Tripod for aurora photography (optional but recommended)
- Swimsuit for hot springs
- Light thermal base layer for evening outings
Planning help
September Weather FAQs
Quick answers with safety notes where it matters.