Planning what to wear in Iceland in September can be a bit tricky. The weather changes quickly, swinging from cool mornings to gusty afternoons. Getting your clothing right can make your trip much more enjoyable.
In this post, I’ll share some outfit ideas and packing tips that can help keep you comfortable as temperatures dip. A little preparation can go a long way in making your adventure memorable.
Outfit Ideas for Iceland in September
Here are five outfit combinations that will keep you warm and dry in Iceland’s September weather.
Merino wool crewneck sweater + Black thermal leggings + Waterproof hiking boots

Temperature fluctuations find a counterpoint in the warmth of wool.
Rust fleece pullover + Charcoal hiking trousers + Windproof shell jacket

The rust fleece pullover handles the chill while the hiking trousers endure the rugged terrain.
Cream thermal top + Olive cargo pants + Wool beanie

Warmth at the core, while essentials are kept close.

Layers handle sudden temperature dips; warmth remains intact against unpredictable rain.
Heather gray base-layer top + Black straight-leg pants + Packable down jacket

A heather gray base-layer top handles temperature shifts, while black straight-leg pants quietly adapt to the changing environment.
Burgundy wool sweater + Khaki hiking trousers + Waterproof crossbody bag

Warmth offsets the chill, while durability handles rugged terrain.
Forest green thermal henley + Charcoal fleece-lined leggings + Trail sneakers

A henley’s warmth offsets the chill of September Iceland, while leggings keep the cold at bay.

The warmth of the sweater counters the chill, while moisture resistance helps with the dampness.
Black long-sleeve base layer + Moss green trekking trousers + Thermal gloves

The base layer draws moisture away, while the trousers enable movement through unpredictable conditions.
Deep blue fleece top + Brown utility pants + Waterproof Chelsea boots

The fleece top traps warmth while the utility pants handle rugged terrain.
Weather Expectations for Iceland in September
As September rolls into Iceland, expect daily temperatures to dance between 45-55°F (7-13°C). It’s like Mother Nature is trying to decide if she wants to keep summer or dive into autumn.
The air can feel a bit damp and windy, so don’t be surprised if you find yourself battling some breezy gusts that could rival a mini tornado. Rain is more common now, so pack an umbrella—unless you want to experience an unexpected shower, which can be a fun surprise unless you’re caught without your raincoat!
With about 12 hours of daylight, you’ll still have plenty of time to explore, but those evenings are getting shorter, so don’t forget to enjoy the sunset.
When it comes to clothing, layering is your best friend. Think comfy tees under cozy sweaters, topped off with a waterproof jacket. You’ll want to have sturdy shoes for all the walking, and maybe a beanie to keep your head warm when the wind decides to play games.
