Embrace the Layers
Seriously, pack layers you can easily add or remove. Reykjavik weather in September is famously fickle, and you might experience all four seasons in a single day.
Reykjavik in September offers a unique shoulder-season experience where the summer crowds thin out, but the weather is still mild enough to enjoy outdoor activities before winter fully sets in. It's an ideal time for whale watching, exploring the city's vibrant culture, and perhaps even catching the first glimpses of the Northern Lights. Packing strategically for unpredictable weather is key to making the most of your trip.
We'll tune the list to your exact trip — dates, activities, and weather.
In September, Reykjavik experiences average high temperatures around 50°F (10°C) and average lows around 41°F (5°C). While snow is unlikely, rain is a common occurrence, with an average of 10-15 rainy days throughout the month. Humidity levels typically hover around 80%, making the air feel damp. You can expect around 12-13 hours of daylight at the beginning of September, gradually decreasing to about 10 hours by the end of the month, offering a good balance for daytime exploration and potential Northern Lights viewing in the evenings.
Reykjavik's September weather calls for layers, layers, and more layers! Locals prioritize comfort and practicality over high fashion, so think warm, waterproof, and versatile. Don't be afraid to embrace technical outdoor gear; you'll blend right in. The key is to be prepared to add or shed layers as the weather shifts throughout the day.
Waterproof and Windproof Outer Shell
Essential for protecting against Reykjavik's frequent rain and strong winds, keeping you dry and comfortable during outdoor adventures.
Mid-weight Fleece or Down Jacket
Crucial for warmth as a mid-layer, providing insulation against the chilly September temperatures.
Thermal Base Layers (tops and bottoms)
Ideal for trapping heat close to your body, especially important for early mornings, evenings, and Northern Lights hunting.
Waterproof Hiking Boots
Necessary for navigating wet city streets, potentially muddy walking paths, and ensuring your feet stay dry and supported.
Warm Wool Socks (multiple pairs)
Keeps your feet cozy and prevents blisters, especially when exploring on foot in damp conditions.
Warm Hat, Gloves, and Scarf
Critical for protecting exposed skin from the wind and cool temperatures, especially when waiting for the Northern Lights.
Quick-Drying Travel Towel
Handy for hot springs, thermal pools, or unexpected showers, as it packs small and dries fast.
Portable Power Bank
Keeps your phone charged for navigation, photos, and Northern Lights apps, especially with increased usage in colder weather.
Swimsuit
A must for experiencing Iceland's famous geothermal pools and hot springs, even in cooler weather.
Eye Mask
Helpful for light sleepers, as even in September, the early morning light can be quite bright before sunrise.
Seriously, pack layers you can easily add or remove. Reykjavik weather in September is famously fickle, and you might experience all four seasons in a single day.
From your jacket to your shoes, ensure your outer layers are waterproof. A good quality waterproof shell and boots will be your best friends against the frequent rain and potentially wet terrain.
A warm hat, gloves, and a scarf are absolute necessities. The wind can be piercing, especially when you're out in the elements waiting for the Northern Lights or exploring the coast.
September marks the beginning of Northern Lights season. Popular tours fill up quickly, and booking in advance increases your chances of finding availability and potentially rebooking if the aurora isn't visible on your first try.
You'll likely be doing a lot of walking, both in the city and on excursions. Choose sturdy, waterproof, and comfortable shoes that can handle various terrains and wet conditions.
September marks the start of the Northern Lights season in Iceland. While sightings are never guaranteed and depend on clear skies and solar activity, you have a decent chance of seeing them, especially towards the end of the month when nights are longer. It's advisable to take a dedicated Northern Lights tour for the best viewing opportunities outside the city lights.
September is considered a shoulder season, meaning the intense summer crowds have started to thin out, but it's not yet the peak of winter tourism. You'll likely find fewer people at popular attractions compared to July and August, offering a more relaxed experience while still enjoying most activities.
September is excellent for a variety of activities. You can enjoy whale watching tours, explore the city's vibrant food scene and museums, visit the Golden Circle attractions, hike in national parks, and, weather permitting, go on a glacier hike or ice cave tour. It's also a great time for hot spring visits like the Blue Lagoon.
Absolutely! A swimsuit is a must-have for Reykjavik in September. Iceland is famous for its geothermal pools and hot springs, like the Blue Lagoon, Sky Lagoon, and various local swimming pools. Even if the air is chilly, the water will be wonderfully warm, making for a unique and relaxing experience.
In early September, Reykjavik experiences about 12-13 hours of daylight. This gradually decreases to around 10 hours by the end of the month. This balance offers ample time for daytime exploration while also providing sufficiently dark skies in the evenings for potential Northern Lights viewing.
Reykjavik's dress code is generally casual and practical, even for dining out. While you might see some locals dress up a bit for finer restaurants, smart casual attire is almost always acceptable. Focus on being comfortable and warm rather than overly formal. Layers are still your friend, even indoors, as some places can be drafty.