What to Wear in London in September: London Outfit Ideas for Your Fall Visit

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September in London is a delightful blend of late summer warmth and early autumn crispness. With average highs around 20.2°C (68.4°F) and lows near 11.6°C (52.9°F), the city offers a mix of sunny days and the occasional rain shower… which begs the question: what to wear in London in September?

Navigating the city’s transitional weather requires a wardrobe that’s both versatile and chic. Here’s your guide on what to wear in London in September, featuring 10 outfit ideas, packing essentials, and tips for varying weather conditions! We’re here to guide you through it all– you’re going to have the best London fall trip!

What to Wear in London in September

London Autumn Clothes: The Basics

Before I get into specific outfits, let’s break down the basics of London autumn clothes. In September, the weather in London can be somewhat unpredictable. Mornings and evenings can be often chilly as we get into the fall, while midday can still has that sunny warmth—especially if you’re lucky enough to have a sunny day. And don’t forget the rain showers too! So, what should you pack for London in September? Think light layers, versatility, and comfort.

Tops: Pack a mix of long-sleeve shirts, lightweight sweaters, and a couple of t-shirts for layering and versatility. Neutral colors are easy to pair with everything, but a fun statement of patterns may be good to throw in there too!

Bottoms: Think of variety: jeans, trousers, and skirts for daytime and evening activities. Things you can wear out at night, but also during the day. Keep it comfortable, basic and simple to not get too cold or two warm.

Outerwear: A stylish trench coat or a warm jacket for cool evenings; as September progresses, you might also want to bring a thicker coat or winter jacket. Maybe like a peacoat?

Accessories: For extra warmth, include scarves, wraps, hats, gloves, and an umbrella or waterproof/resistant jacket on cloudy and rainy days!

A young woman in an off-the-shoulder poncho holds a cup of coffee on a bridge in London.

London in September Outfit Ideas

Now I will list more specific September outfit ideas for London. Feel free to substitute with staples in your closet or what makes you feel more comfortable!

1. Midi Dress + Sneakers + Trench Coat + Crossbody Bag

Looking for a fit perfect for a day at the British Museum or a leisurely stroll through Hyde Park? Start with a classic beige trench coat. Pair with a floral midi dress that will offer elegance and practicality. And throw on shoes for walking comfort! The trench provides protection against unexpected showers, while the dress keeps you comfortable during warmer spells.

A young blonde in sunglasses stands in a street in London while wearing a turtle neck that is striped: she knows what to wear in London in September.

2. Lightweight Sweater + High-Waisted Jeans + Chelesa Boots

A cozy cashmere sweater layered over high-waisted jeans balances comfort with style. The sweater can be easily removed if the day warms up, especially if you put a t-shirt under it! Wear with some comfortable Chelsea boots, too. This is perfect for brunch in Covent Garden or shopping along Oxford Street.

A tourist leans against a red telephone both in a turtle neck and a jean jacket while holding a camera and wearing a beanie.

3. Leather Jacket + White-T-Shirt + A-Line Skirt + Boots

Need an outfit that is great for a visit to Camden Market or an evening at the West End theatres? Start with a basic white t-shirt. Add a leather jacket and an a-line skirt! The black leather jacket adds an edge to a soft A-line skirt, making it suitable for both day and evening activities. And boots always pair well with a leather jacket.

A woman leans against the walls of the church in the main hub of London, and she knows what to wear in London in September toward the end of the month as she wears her fleece turtleneck and a trench coat that hands off her shoulder.

4. Floral Jumpsuit + Tote Bag + Denim Jacket + Trainers

A light denim jacket over a floral jumpsuit offers a relaxed yet put-together look. The jacket provides warmth during cooler moments and a tote bag is versatile for holding all your things, while trainers make sightseeing and exploring easy. This outfit is ideal for a casual day exploring Notting Hill or a visit to Portobello Road Market.

A young girl stands on the edge of the Tube platform, waiting for public transport with her leather jacket over her purple sweater and her backpack.

5. Cardigan + Tartan Trousers + Crossbody Bag + Loafers

This is one of those outfits for London in September that is perfect for a day at the Victoria and Albert Museum or a walk along the South Bank. The soft cardigan layered over tartan trousers brings a touch of British heritage to your outfit! The cardigan can be tied around the waist if it gets too warm, and loafers are classic and comfortable.

A young blonde stands on the bridge of the river Thames in a trench coat; she knows what to wear in London in September as glass buildings tower behind her, like the shard.

6. Blazer + Silk Blouse + Hemmed Trousers + Loafers

Looking for something more professional? Or going to a refined dinner in Soho? A tailored blazer over a silk blouse exudes sophistication. You can also always take the blazer off for warmth and something more casual. Pair with hemmed trousers, maybe navy blue or beige, and loafers!

A girl in a hat and long-sleeve blouse smiles as she stands on the bridge across from Big Ben!

7. Pleated Skirt + Long-Sleeve Shirt + Puffer Vest + Trainers

As September gets cooler, know that you’ll have to up the types of layers. A lightweight puffer vest over a pleated skirt offers warmth without bulk. The vest is easily packable for travel too! Throw it over a long-sleeve shirt and pull on some trainers. This is great for a day trip to Greenwich or a visit to the Tower of London.

A girl who is walking across the Churchill Arms bar knows what to wear in London in September, as she prepared her layers with jeans, a striped shirt, a jacket that she has off and a crossbody bag.

8. Knit Dress + Leather Jacket + Over-the-Knee Boots + Leather Bag

This outfit is ideal for an afternoon tea at The Ritz or a visit to the Tate Modern! A cozy knit dress paired with over-the-knee boots provides warmth and style. The boots protect against damp streets and unexpected rain. Bring a leather jacket as needed, and pair with a leather bag for an extra statement.

A woman stands across from Big Ben and looks across the river while wearing a suede jacket and a leather backpack.

9. Utility Jacket + Cargo Pants + White T-Shirt + Chunky Trainers

Looking for something more casual? This outfit is versatile and suitable for a walk through Hyde Park or a visit to the Natural History Museum. A utility jacket over cargo pants offers a practical and stylish ensemble. The jacket’s multiple pockets are handy for carrying essential, which means no bag required! Chunky trainers really tie the outfit together too!

A girl in a blue jacket knows what to wear in London in September as she turns toward Tower Bridge and faces the chill of the wind off the water.

10. Skinny Jeans + Poncho + Chelsea Boots + Crossbody Bag

This is one of those fall outfits that is perfect for a day at the Tate Britain or a leisurely walk along the Thames! The cozy poncho layered over skinny jeans provide warmth and comfort. Plus, it’s extra cute when you add Chelsea boots and a somewhat matching crossbody bag!

A woman in a red jacket and pants walks toward Big Ben with a giant blue tote bag thrown over her shoulder.

Weather Packing Tips for London in September

For Mild and Sunny Days

Opt for a midi dress paired with comfortable sandals or a lightweight sweater over high-waisted jeans. Bring sunglasses and a wide-brimmed hat can protect against the sun too, because even if there are clouds in the sky, you will want that protection! And don’t forget comfortable flats or breathable sneakers are ideal for walking to enjoy the wonderful weather.

If It’s Rainy

London is always prone to cloudy days and unexpected (and expected) rain showers. To prep for this, bring a waterproof trench coat over a cozy sweater and leggings keeps you dry and warm. Remember that when it rains it will get cooler too! So, don’t forget a compact, sturdy umbrella since it is an essential. And then water-resistant ankle boots or stylish wellies will help too!

A girl knows what to wear in London in September when it rains: her blue umbrellas protects her silk scarf and houndstooth jacket.

If It’s Extra Chilly

When the days are chillier, which they will get toward the end of the month, layer a cashmere sweater under a tailored blazer or a puffer vest over a knit dress. Fabric type is just as important as the layers themselves! Include gloves and a thick scarf as needed, and make sure you have over-the-knee boots, tights, or insulated boots for protection. Wind against the River Thames is NOT to be messed with, and it will keep you extra chilly on those already chilly days.

If It’s All Over The Place (Windy, Rainy, Cloudy)

If the weather is indecisive and unpredictable, think of how you can layer as needed. A versatile cardigan layered over a t-shirt or blouse allows for easy adjustment! Bring a foldable umbrella or packable rain jacket in a tote just incase, and then comfortable sneakers or ankle boots are suitable (and stylish!) for various conditions.

A woman smiles as the sun sets beyond her in a public market: she knows what to wear in London in September with her turtleneck sweater and leather jacket.

Extras Packing List for London

When traveling to London in September, it’s important to pack a few thoughtful extras to enhance your experience. While you may already have the essentials covered, a few key items can make your trip more comfortable and enjoyable. Even if you only spend one weekend in London, you will want to pack some of these extras to make the most of your time in the city.

Quality Umbrella

First, consider bringing a good-quality umbrella. London often experiences rain in the fall, and while the showers are usually light, a compact and sturdy umbrella will keep you dry as you explore. Make sure it’s small enough to slip into your bag, as space in your luggage may be limited. Find a cute one with a beautiful design and color to enhance your London in September outfits!

Portable Charger

Compact Tote Bag

Additionally, a lightweight, foldable tote bag is handy for shopping or carrying extra items as you explore the city. London has its fair share stylish boutiques, and a spare bag will allow you to pick up some unique souvenirs or delicious pastries from local markets without worrying about your other belongings.

A young tourist with red hair stands in front of the Tower bridge with a mini British flag: she smiles as she wears a warmer trench coat and green scarf.

Final Thoughts on Outfits for London in September

Understanding what to wear in London in September involves preparing for a range of weather conditions. By packing layers, waterproof essentials, and comfortable footwear, you can navigate the city’s climate easily! And be prepared for anything. Remember, Londoners often dress in layers, allowing them to adapt to changing temperatures throughout the day.

So, whether you’re exploring historic landmarks, enjoying a West End show, or indulging in afternoon tea, dressing appropriately ensures you are comfortable and stylish. Embrace the autumn charm of London and make the most of your September visit. You’ll fit right in! Have a blast!