When to go · September

Iceland in September

Excellent time to go

Highland roads begin closing mid-month as first snows arrive at elevation.

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Daytime high

11°C

52°F

Overnight low

5°C

41°F

Rainfall

67 mm

moderate

Crowd levels

medium

manageable

Prices

medium

shoulder

What to expect in Iceland in September

September brings cool weather to Iceland, with daytime highs around 11°C (52°F) and overnight lows near 5°C (41°F). Skies are typically dry with occasional showers, with about 67 mm of rainfall on average. Highland roads begin closing mid-month as first snows arrive at elevation..

Crowds are manageable in September — busy in popular areas but not overwhelming. Prices sit in the shoulder-season range — not the cheapest, but well off peak. Peak season runs June–August, for context.

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