For a trip to London in September, make sure to pack a windproof and waterproof jacket, a travel umbrella, and durable, comfortable walking shoes or boots. Don't forget to bring extra layers for the cooler evenings and chillier days.

Even though London’s weather in September is usually mild, temperatures tend to drop during the evening and overnight. By the end of the month, you’ll notice a notable decrease in temperature. Here’s a guide on what to wear in London during September.
Footwear
Given the amount of walking you’ll do, comfortable shoes for all-day wear are a must. Consider packing a separate pair of shoes for the evening. The weather in September can be unpredictable, so versatile footwear like trainers or sneakers will adapt to various conditions without requiring extra packing.
Outerwear
A waterproof jacket is essential due to London’s unpredictable weather and cooler nights. Layers are key; a waterproof jacket with a removable fleece is a good choice. A spacious daypack is also handy for carrying layers as the weather shifts.
Layering
Active trousers, whether with zip-off legs or not, are ideal for September’s variable temperatures. Wear a T-shirt when it’s warm and add a sweater as needed. Jeans are a good choice for cooler evenings.
Essentials
Bring a packable waterproof jacket, a comfortable daypack, and a travel umbrella as essential items for your September trip to London.
London in September FAQs
Is September a good time for London?
September is a fantastic time to visit London. It’s less crowded compared to the summer months, and the mild weather is great for sightseeing. The weather stays warm, and September is usually one of the drier months. With many locals back from their summer breaks, you’ll experience a more authentic side of city life.
What is happening in London in September?
In September, London hosts several significant festivals and events, such as the Totally Thames Festival, which runs throughout the month, the London Design Festival, and Open House London. London Fashion Week also takes place, featuring the latest trends and attracting designers globally. For literature enthusiasts, the London Literature Festival is another key event.
Is London still hot in September?
In September, London generally enjoys warm weather, with temperatures not dropping significantly until October. Expect averages between 13°C (55°F) and 20°C (68°F), making it perfect for exploring. However, occasional rain showers can occur, so packing a light rain jacket might be useful. The extended daylight hours offer more time to enjoy the city's attractions.
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Top Things to Do in London in September
Wondering what to do in London in September? Here are some suggestions to enhance your visit.
Take a Walking Tour
The mild September weather and reduced rain make it an ideal time for a walking tour of London. Choose from various options across the city, including Harry Potter-themed tours, food excursions, or those focusing on royal landmarks. Consider joining a guided tour for unique insights into the city’s history and hidden treasures. Many tours offer early bird or group discounts, so be sure to look for deals. Additionally, the quieter streets in September make for a more relaxed and enjoyable experience compared to the summer months.
Attend Totally Thames
- When: Throughout September
- Where: Along the River Thames
- Closest tube: Varies
From September 1st to October 1st annually, Totally Thames showcases a variety of arts and cultural events spanning a 42-mile stretch of the river. The festival features art displays, educational and environmental programs, performances, boat excursions, and more. Be sure to take advantage of the Thames Clippers River Roamer service, which offers the flexibility to hop on and off at different festival stops along the river. Additionally, check the festival’s website for a detailed schedule of events and highlights to plan your visit around specific activities or performances you’re interested in.
Free Access at Open House Festival
- When: Early to mid-September
- Where: Various locations throughout London
- Closest tube: Varies
During early to mid-September, Open House London provides complimentary entry to notable buildings. This festival highlights a range of structures, including churches, museums, and private homes. Some sites require pre-booked tickets, so it’s wise to plan and secure tickets in advance to avoid missing out. For the most popular sites, consider arriving early as they can get quite busy. It's also a great opportunity to explore architectural styles and history across different neighborhoods in London.
Explore the London Design Festival
- When: Mid to late September
- Where: The V&A Museum and various venues across London
- Nearest tube station: South Kensington (for V&A)
The London Design Festival celebrates the city's rich design heritage. Throughout the city, various creative events are held, honoring this festival that has been a prominent fixture for over twenty years. Visit the V&A Museum for major exhibitions, or check out other events to experience innovative designs from both established and up-and-coming designers. Don’t miss the chance to explore pop-up installations and design talks happening across the city. The festival often includes interactive displays and workshops, offering hands-on experiences with cutting-edge design.
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What to Do in London This September?
September is a fantastic time to visit London. The city offers a range of exciting – and free – festivals, and the weather is pleasantly warm but not overly hot, making it ideal for sightseeing. Additionally, the crowds are smaller compared to summer. Don’t miss the chance to enjoy cultural events like the Thames Festival and the London Design Festival, which showcase the city's vibrant arts scene.
The city's parks, such as Hyde Park and Regent's Park, are particularly lovely in September, offering a great opportunity for outdoor activities or a relaxing picnic. Also, explore the numerous open-air markets like Borough Market, where you can enjoy delicious food and unique finds.
For a unique experience, consider taking a stroll along the South Bank, where you can enjoy street performers and riverside views. The London Eye and other iconic landmarks are less crowded this time of year, providing a more enjoyable visit.
In summary, September is an excellent month to explore London, offering pleasant weather, fewer crowds, and a wealth of activities and events!
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