Weather in Iceland in September: travel guide

Planning to visit Iceland in September? Read on to find out everything you need to know about the weather in Iceland in September and other essential travel tips. From average temperatures and driving conditions, to what to do and what to pack, this guide should help you to make the most of your time in Iceland. 

What is the weather like in September?

The weather in September can vary significantly depending on the location you're interested in. In general, September marks the transition from summer to autumn. It tends to be milder than the peak summer months, with less heat and humidity. This makes September a great time for travel, as you can enjoy comfortable temperatures and often fewer crowds

Before traveling to the land of glaciers and geysers, arm yourself with an understanding of the weather in Iceland in September.

Can't wait for your trip to Iceland? Increase your chances of an unforgettable trip by choosing one of the best places to stay in Reykjavik.

Average temperatures in September in Iceland

Autumn in Iceland sees a gentle dip in temperatures from the summer highs. The average daytime temperature in September hovers around the comfortable 50°F (10°C) mark. 

Come nightfall, the temperatures drop to an average low of 42°F (6°C). 

September winds and rain

September marks the onset of autumn in Iceland, bringing persistent winds and frequent showers. It's one of the rainiest months in Iceland, with an average of 20 days of precipitation, amounting to around 3 inches (76mm).

The rainfall ranges from drizzle to downpours, depending on your location, with places like Dalatangi receiving up to 6.3 inches (160mm) and Akureyri seeing an average of 1.5 inches (39mm).

In addition, Iceland is known for its potent winds, which can make the weather feel much colder than the mercury level suggests. 

Not sure about visiting in September? Read our guide to the best time to visit Iceland.

Understanding Iceland's climate in September

September sees Iceland transition from summer to autumn. So, when planning a trip, it's worth being aware of the month's specific weather characteristics.

Long daylight hours

Early September still offers plenty of sunlight, with daylight lasting 14.5 hours. The sun rises around 6:00 AM and sets around 9:00 PM, so September is a great time to make the most of your days!

As the month wears on, daylight hours shrink to 11.5 hours, with sunrise shifting to 7:30 AM.

That said, this decline in daylight isn't all doom and gloom. September is the first month when the skies are dark enough to see the majestic Northern Lights. 

Fall colors of Iceland

Fall introduces a grand splash of color to Iceland's rugged landscapes. Despite having few trees, areas like the Icelandic Highlands and Thingvellir National Park in the Golden Circle are painted with shades of gold, red, yellow, and brown. 

Other top places to see Iceland's fall colors are the Hraunfossar Waterfalls and Heiðmörk. 

Rough Guides tip: Find even more ideas for your fall adventure with our guide to the best places to travel in September.

Tips for your September visit to Iceland 

Read on for travel tips that'll serve you well as you plan your trip to Iceland in September. You might also want to read our tips for visiting Iceland at any time of year.

Best activities to do in Iceland in September

Now you know what to expect from the weather in Iceland in September, here's a run-down of some of the best activities you can enjoy during your visit.

• Drive to the Snæfellsnes Peninsula: often referred to as Iceland in miniature, the Snæfellsnes Peninsula offers everything from soaring mountains and quaint villages to stunning coastlines.
• Visit Hraunfossar Waterfall: with magnificent autumn colors as its backdrop, the Hraunfossar waterfall looks at its best in September — the flowing water contrasts spectacularly against the moss-covered lava rock.
• Go hiking on Langjökull Glacier: experience an adventure on the second-largest ice cap in Iceland. Just remember to wear your warmest clothes and good hiking boots, and join a guided tour if you're not a seasoned hiker.
• Watch the Northern Lights: with longer nights settling in, September is one of the best times to chase the mesmerizing Northern Lights. To boost your chance of sightings, check the forecast and head away from city lights.

For more ideas, read our run-down of the best things to do in Iceland.

What to pack for September in Iceland

With the weather in Iceland in September being unpredictable, you'll want to come prepared for a range of conditions. Here are some essential items to add to your suitcase.

• Waterproof clothing: a waterproof jacket and pants are a must for walkers and hikers.
• Layered clothing: choose clothes that can be layered, like thermal leggings, t-shirts, long-sleeved shirts, and sweaters. You'll also want to bring a warm hat, scarf and gloves.
• Appropriate footwear: given the terrain and weather, waterproof hiking boots are essential. Pack warm wool socks to keep your feet cozy, and throw in flip-flops for visits to hot springs.
• Accessories and essentials: sunglasses, a quick-dry towel, a water bottle, and a backpack suitable for hiking will come in very handy. Also remember to pack electronic items like adapters, chargers, cables, and power banks.

Driving conditions in Iceland in September

Given that there's usually no snow or ice on the roads at this time of year, driving in Iceland in September is usually safe. Nonetheless, there are a few factors to consider before venturing onto the roads.

• Weather changes: the weather in Iceland in September can be unpredictable, and sudden changes can affect road conditions. Always check the weather forecast before setting off, and check safetravel.is for weather advisories.
• Car selection: if you're planning to drive to the North, Westfjords, or East Iceland, consider renting an All-Wheel Drive (AWD) or a 4x4. These regions usually experience fall and winter earlier, and such vehicles are safer in more wintry conditions.
• Vision comfort: the angle of the autumn sun in Iceland can be low and potentially blinding, so have your sunglasses handy.

Can you see the Northern Lights in September?

Absolutely, yes! Iceland's Northern Lights season begins around September and runs until April, with the lights displaying their strongest charm at the start and end of this period. As a result, September is a prime time to witness this mesmerizing spectacle.

However, you might still need to keep your fingers crossed — the visibility of the Northern Lights depends on several variables. Specifically, lack of light pollution, clear dark skies, and strong solar winds.

As a result, to maximize your chance of seeing the lights, you'll want to head away from the city or book a guided Northern Lights tour from Reykjavik. 

For more on this subject, read our guide to the best places and times to see the Northern Lights.

Plan your trip with our Iceland itineraries

Our Iceland itineraries are crafted to help you experience the best of the country, stress-free. Think of them as a starting point — perfect for planning, but flexible enough to adjust to your own pace and interests. After all, travel is about freedom, but a little planning goes a long way.

• Iceland itinerary 5 days: A quick trip hitting Iceland’s highlights. Visit Reykjavik, the Golden Circle and take in the stunning scenery of the South Coast.
• Iceland itinerary 7 days: A week gives you a bit more time to explore beyond the basics. You’ll see the Golden Circle, South Coast, and have time for a few hidden gems or extra hikes.
• Iceland itinerary 10 days: Ten days allows for a more relaxed pace and a chance to see multiple regions, including the East Fjords or Snaefellsnes Peninsula.
• Iceland itinerary 14 days: Two weeks means you can really explore Iceland in depth, including the Ring Road and possibly the remote Westfjords.
• Iceland Ring Road itinerary: A full circuit of Iceland’s Ring Road, typically done in 7-10 days. Expect constantly changing landscapes, from glaciers to fjords to volcanic plains, and the freedom to explore each region as you go.

FAQs

Read on for the answers to common questions that might crop up as you plan your trip to Iceland in September.

What to wear in Iceland in September

Wondering what to wear in Iceland in September? This handy list will help you out.

• Thermal underwear: opt for thermal underwear as a warm base layer.
• Layers: complement your thermal base layer with sweaters, fleeces, long-sleeved shirts, and warm pants. 
• Waterproof items: as September is a rainy month, don't forget to wear waterproof outer layers and waterproof hiking shoes or boots.
• Warm accessories: warm hats, gloves, and scarves will provide much-needed warmth against the chilly Icelandic winds. Thermal socks are essential, too.
• Swimwear: Iceland is home to several geothermal pools and hot springs, and swimming is possible year-round.
• Sunglasses: despite the cooler temperatures, the fall sun can be strong.  

Is Iceland sunny in September?

Although the duration of sunlight and the clarity of the skie can vary, Iceland experiences a good deal of sunshine in September.

At the beginning of the month, you'll see up to 14.5 hours of daylight a day. By the end of the month, this falls to 11.5 hours.

Is Iceland crowded in September?

September is an off-peak season in Iceland. As a result, the crowds are a lot smaller than in July and August. This is particularly true for popular attractions like the Blue Lagoon and the Golden Circle. While they'll still be busy, they won't be nearly as crowded as they are in summer.

You're also likely to enjoy lower accommodation prices — many hotels and inns offer off-peak rates from September.

Tip from Rough Guides: also learn about the best ways to get to Iceland.