Planning a visit to London this September feels like stepping into a different rhythm of the UK capital. With mild weather and fewer crowds compared to summer, this month is arguably the best time to explore the city. Spoiler alert: this guide covers everything you need to know before visiting, from temperatures and rainfall to daylight hours.
When planning your trip, you’ll want to pack smart—think versatile layers and a compact umbrella. Make sure you read this first: consider the lowdown on local forecasts, so you know what to expect. Before heading home, take a moment to reflect on the reading you’ve done here; it’s the perfect primer for a seamless, unforgettable adventure.
Weather
When you step into London in September, the temperature still carries the warmth of summer, particularly during the early part of the month. It’s a lovely transition into autumn, marked by mild conditions that shift gently as the days’ progress. You might catch an average high of around 20°C (68°F), while the average low dips to about 13°C (55°F). Despite autumn officially beginning on the 1st of September by the meteorological calendar, the city still holds onto a summer-like charm.
In fact, September is typically the fourth-warmest month in London—trailing just behind the peak summer period. The weather feels strikingly similar to June, with bright skies and moderate warmth lingering through the afternoons. The city usually sees around eight days of rain, a relatively modest amount that makes the outdoors appealing for walks and exploration.
Mild weather
From a local’s perspective, the UK is known for its mild climate. That doesn’t mean the skies are always cooperative, but it does mean there’s a sense of predictability. While major weather events remain uncommon in the capital, there are the occasional storms or brief flash floods. Still, for the most part, you’re dealing with a city that avoids extremes. Packing for London in September means layers, not survival gear.
Changeable weather
One expert once said, “London doesn’t have weather—it has moods.” And that rings true, especially in September. Thanks to the maritime climate, influenced by the island nature of the country, the weather can change quickly. You might wake up to clear, even cloudless, skies, only to find yourself pulling out an umbrella by the afternoon. So it’s best to be prepared for rain at any time. That’s not an exaggeration—it’s just London being its charmingly unpredictable self.
Wet weather
There’s an old joke that if you don’t like the wet weather in the UK, wait five minutes. And while London is famous for its grey skies, September might surprise you. You could visit and experience no rain at all—or, alternatively, find yourself caught in heavy showers every day. It all comes down to a matter of luck.
That said, spells of dry or wet weather tend to last a few days at a time, giving you a chance to plan accordingly. Locals know to keep an umbrella in their bag and an eye on the forecast—something visitors quickly learn.
Daylight hours in London
In September, the rhythm of the day shifts noticeably in London. With the sun continuing to rise between 6.15 and 7 am and set between 7.45 and 6.40 pm, you’ll still find yourself with around 12 hours or more of usable daylight—plenty of time to enjoy the city’s streets, parks, and riverside paths. Most days in September offer this generous window of light, tapering gently as autumn edges closer.
Whether you’re visiting for the museums or just chasing café terraces in golden light, the steady shortening of days adds a peaceful rhythm to the month. It’s not quite the endless light of summer, but far from the early darkness of winter.
Sunrise
One of my favourite ways to ease into a London morning in early September is to catch the sunrise around 6.15 am. There’s a softness in the light and a rare calm before the city stirs. By the end of September, that moment of first light shifts closer to 7 am, still early enough to enjoy quiet streets but with a chill that hints at the season turning. If you’re an early riser, the timing gives you a beautiful start to the day, especially along the Thames or from a quiet spot in one of the city’s parks.
Sunset
At the start of September, the sun doesn’t set until around 7.45 pm, casting long shadows across the buildings and soaking the city in a warm evening hue. By the end of the month, however, sunset comes about 6.40 pm, and with it a more subdued and crisp atmosphere. The month wraps you in soft golden hours early in the evening, perfect for winding down after a day of exploring.
What to pack for September tour?
Planning a trip to London in September? What’s in your suitcase can make all the difference. While the weather tends to be mild, temperatures do drop during the evenings and especially overnight as the month progresses. You’ll want to prepare for both colder days and the pleasant warmth of early autumn afternoons.
Don’t leave without a wind and waterproof jacket, and make space for a travel umbrella. These are essentials, not just suggestions. Add extra layers that you can peel off or pile on depending on how the day unfolds. Whether you’re out sightseeing or grabbing dinner by the Thames, the right pair of comfortable walking shoes or boots will be a lifesaver.
Footwear
One thing’s certain: you’ll be walking a lot. That’s why comfortable shoes are your best ally in London. Choose something you can wear all day without regret. Personally, I’ve found that alternating a change of footwear for the evenings helps a lot—sometimes it’s less about fashion and more about giving your feet a break.
Given that September can offer anything from sunshine to showers, your footwear might range from sandals to boots. I find trainers or sneakers are the perfect in-between—they work in most scenarios without stuffing your suitcase with too many pairs.
Outerwear
When it comes to outerwear, the word is versatility. A waterproof jacket is non-negotiable. In a city known for its unpredictability and quick shifts in weather, being caught without one is a rookie mistake. I recommend one with a removable fleece—ideal for transitioning between cooler evenings and warmer moments during the day.
A daypack with sufficient space can be incredibly useful to carry clothing you might shed as the weather warms. Nothing ruins a travel day like carrying your coat in your hands the whole time.
Layering
The art of layering becomes your best friend in September. I’ve often relied on active trousers—the kind with or without zip-off legs—to handle everything from sunny afternoons to breezy riverside strolls. For the top half, I usually start with a T-shirt and throw on a sweater if needed. Jeans are great for evenings when it’s cooler, offering just the right amount of comfort and warmth.
Essentials
Let’s not forget the small things that make a big difference. A packable waterproof jacket, a comfortable daypack, and a travel umbrella should always be in your lineup. These are the ideal accessories for a September trip to London, making it easier to adapt as the city surprises you, as it always does.
Top Things to do in London in September
Take a Walking Tour
If you’re visiting London in September, there’s arguably no better way to experience the city than by setting off on a walking tour. With mild weather, less chance of rain than other months, and a light breeze that keeps you refreshed, September truly is the ideal time to explore on foot.
When and Where?
Walking tours operate as per tour, giving you the freedom to choose a time that fits your itinerary. Since these tours stretch across various locations, you can select routes based on your interests—from historic corners to cultural hotspots. The closest tube varies depending on your chosen start point, making public transport a convenient partner in your day of discovery.
What to Expect
You might pass Big Ben, weaving through the crowd of pedestrians and the occasional cyclist in the foreground of iconic landmarks. Whether you’re deep into Harry Potter-themed tales or looking to sample the city’s culinary scene on foodie tours, there’s something for everyone. Some tours even focus on the city’s royal sites, offering a glimpse into regal heritage just steps away from bustling streets.
Having tried several of these myself, I can honestly say that walking brings you closer to the heart of London—its many available stories, smells, sounds, and hidden angles that you’ll likely miss from the top of a tour bus.
Attend Totally Thames
One of the cultural highlights when you’re in London is without a doubt the Totally Thames festival. Running throughout September—from the 1st of September to the 1st of October—this annual celebration transforms a 42-mile stretch of the River Thames into a dynamic corridor of art, heritage, and performance.
When and Where?
This isn’t a single-location event. Instead, it unfolds on and along the River Thames, immersing you in both riverside charm and urban creativity. The closest tube stations to various venues vary, but that’s part of the fun—each stop brings something new.
What to Expect
The festival includes a diverse range of arts, cultural events, and performances, all carefully curated to reflect the spirit of London. You might catch a riverside boat trip, engage in educational programmes, or explore environmental projects that make you think differently about the river’s role in the city.
Something for Everyone
Personally, I find the mix of activities, arts events, and thoughtful programmes—both educational and environmental—to be what makes Totally Thames stand out. There’s always more to discover, whether you’re a first-time visitor or a returning fan of the festival.
Admire London Design Festival
Among the many creative highlights that unfold in September, one event that continues to leave an inspiring mark is the London Design Festival. Scheduled from mid to late September, this city-wide celebration pays tribute to London’s rich design heritage, drawing attention from global audiences.
When and Where?
Taking place across multiple venues across the capital, the epicentre of the action is the V&A Museum—a landmark synonymous with design and innovation. For those planning to start their experience there, the closest tube is South Kensington. From there, exhibitions and installations ripple out across the city.
A Celebration of Creativity
The festival celebrates not just the city, but the wider UK capital’s role as a hub of creativity. With events held at iconic and emerging locations, the London Design Festival has been running for over two decades, steadily growing in influence and scale. It’s not just an exhibition—it’s an experience of living, breathing artistry that reflects both tradition and progress.
Why You Should Go
As someone who appreciates the blend of structure and imagination, I find this event to be the perfect fusion of both. Whether you’re new to design or a seasoned creative, the London Design Festival offers insight, inspiration, and interaction at every turn. It’s a curated journey through form, function, and future thinking.
Art Exhibitions Worth Exploring This Month
A New Way to Experience the Gallery
Wandering into a dimly lit gallery room, digital artwork pulses gently across the walls, while a crowd gathers near a DJ booth — this is not your typical art exhibition. There’s a refreshing fusion happening: classic creativity meets modern presentation. This month’s exhibitions invite you into multisensory, immersive spaces where sound, light, and imagery collide to offer something beyond static canvas and paint.
Modern Masters and Digital Delight
From the delicate surrealism of Dalí to the textured drama of Van Gogh and Klimt’s golden elegance, Frameless creates a unique space to witness legendary works in motion. It’s more than a visual journey — it’s an emotional dive. Each projection tells its story with moving intensity. The Frameless Lates evenings bring another layer to the experience, layering cultural appreciation with social connection.
Meanwhile, the Moco Museum has rapidly become a hub for lovers of modern and interactive installations. The latest exhibitions challenge perspectives through edgy concepts and evolving mediums, truly redefining what gallery spaces can be. Walking through Moco is like navigating a creative playground where every corner holds a surprise.
Dialogue Between Generations
At the Royal Academy of Arts, step into the contemplative exhibition Kiefer/Van Gogh. Here, the bold legacy of Van Gogh converses across time with Anselm Kiefer’s brooding expressions. Seeing the duo’s works side-by-side is both haunting and beautiful, as texture and symbolism intertwine.
Your Map to Creativity
Whether you’re an art lover or a casual explorer, these exhibitions provide more than just visual appeal — they spark curiosity and inspire thought. Keep an eye on the city’s art calendar or download the Visit London app to stay updated on what’s popping up next. From seasonal showcases to permanent gems, the cultural scene offers constant refreshment.
As someone who often finds clarity walking through art-filled corridors, I can say September’s exhibitions don’t just fill your schedule — they fill your soul.
Musicals, plays and theatre shows
Stepping into the West End this month, you’re immediately transported by the magic of the stage. From award-winning musicals to innovative plays, the city hums with creativity, offering everything from long-running favourites to must-see new performances. Whether you opt for an evening of glamour at the Victoria Palace Theatre or a daytime showing that brings fresh energy, there’s a production to suit every taste.
My own highlight was Hamilton—the tale of a founding father reimagined in blue and beige uniforms, pulsating through the house as Thomas Vernal embodied George Washington. From the first trumpet blast, you feel the resilience and belief that have made this musical a global phenomenon.
A Feast for Theatre Lovers
- Lion King and Wicked offer spectacle and nostalgia, with towering puppetry and soaring vocals that captivate from curtain to encore.
- The thrilling adaptation of Dracula at the Lyric Hammersmith (11 Sep–11 Oct) weaves horror and romance as Mina Harker pieces together the mysterious tale of Count Dracula.
- Matilda The Musical at the Cambridge Theatre brings Roald Dahl’s beloved story to life, while Six The Musical at the Vaudeville Spotlights Tudor queens reclaiming their narratives.
- For a blend of nostalgia and nostalgia-defying fun, Back to the Future: The Musical at the Adelphi sends Marty McFly on a time-bending adventure.
Contemporary and Immersive Experiences
- ABBA Voyage at the ABBA Arena transforms the world-famous band into a spectacular show of music and choreography—truly a pop hits playground.
- Harry Potter and the Cursed Child at the Palace Theatre conjures 19 years of magic and mystery with inventive staging and beloved characters.
- Cabaret at the Kit Kat Club (immersive venue) whisks you back to 1930s Berlin, blending smoky jazz with theatrical grit.
- Mamma Mia! at the Novello invites you to sing along to ABBA-inspired anthems, while The Phantom of the Opera at His Majesty’s still haunts with its haunted love story.
Seasonal Spectacles
Newcomers like Moulin Rouge! at the Piccadilly light up the theatre district with glitz and grandeur, and each show-stopping performance reminds us why this corner of the city is synonymous with theatrical excellence.
Frequently Asked Questions
Is September a good time for London?
In short: absolutely. September is considered an ideal time to visit London. The city is not as crowded as in summer, making it easier to explore popular attractions and neighborhoods. From personal experience, it’s a time when the city feels more balanced—there’s room to breathe without losing the buzz.
The milder weather is perfect for getting outdoors. Whether you’re exploring parks, markets, or riverside paths, September’s still warm climate is easy to enjoy. It also happens to be among the drier months, which is always a welcome bonus.
What is going on in London in September?
There’s no shortage of events and festivals that take place in London during September. The city’s cultural calendar is full of energy. Several big happenings create a lively backdrop for your visit.
Highlights include the Totally Thames Festival, which runs throughout the entire month, offering installations and performances along the river. Then there’s the London Design Festival, which showcases creativity across the city, and Open House London, a unique event giving access to architectural gems usually closed to the public. Each of these experiences adds something special to a September itinerary.
Is London still hot in September?
If you’re wondering whether it’s cold or still hot in September, the answer lies in that comfortable middle ground. The UK capital is usually warm at this time, and temperatures only begin to drop as October approaches.
Expect averages between 13°C (55°F) and 20°C (68°F)—a sweet spot that makes it perfect weather for exploring. You won’t need full winter gear, but packing a few layers is a smart move. This kind of climate means long walks, al fresco lunches, and light jackets all make sense.