Fall,  Packing Lists,  Seasonal

What to Pack for London in September

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Chilly mornings, crisp leaves, and that overplayed-but-you-still-gotta-love-it pumpkin spice scent and flavor everywhere. I’ve gotta be honest: I love autumn. I especially love London in autumn, when the leaves begin to change and the city takes on an even more golden glow in my eyes.

September kicks off the autumn season in London, but it’s a month of transition. While visitors early in the month might enjoy hanging-on summer weather, those visiting later could well wonder if it’s not going to be winter tomorrow. (Okay, I’m being dramatic – but temps can fall pretty significantly from the beginning to the end of the month.)

What to Pack for London in September Hero

Visiting during a transitory month has its benefits, but those do not apply when it comes to packing. Figuring out what to pack for London in September can be tricky since you might need to pack for summer and autumn – and maybe some almost-wintery weather too. If you, like me, prefer to travel light, it can be even more confusing.

In this guide, I’ll share my best tips about what to pack for London in September. I’ll start with some important overview info – daylight hours, sunrise/sunset, temperatures, and weather – and then dive into a specific list of the items (and number of items) I recommend to keep you cozy and happy during your London itinerary. Grab your suitcase and let’s get it packed!

Sunrise & Sunset Times in September

While it might not seem relevant to start at this point, it’s actually important to understand how long the days will be during your London trip. This helps you plan accordingly (such as timing your tickets for the London Eye to try and enjoy the sunset!), and – as you’ll see – the rapidly shortening days help explain the quickly falling temps that only autumn can bring.

So to begin, here’s a quick chart of sunrise and sunset times in London in September: 

1st15th30th
Sunrise6:12am6:35pm6:59pm
Sunset7:47am7:15pm6:40pm
Daylight Hours~13.5 hours~12.75 hours~11.75 hours

As you can see, September is a pretty good time to visit London. You can still take advantage of the last sunny days and warm, dry weather to discover London’s amazing city. Though the days are shortening, these actually make it more convenient to take in (or photograph) the sunrise or sunset if you want to, too.

London September Weather & Temperature

September is a month of transition. Consequently, you can expect the London temperature in September to vary considerably from the first two weeks to the last two weeks of the month. 

In early September, London still experiences comfortable weather with temperatures hovering around 70°F to 64°F in the daytime. Mornings and evenings are a bit colder; temperatures tend to average in the mid-upper 50°F. By late September, things get colder, with temperatures falling to the low-mid 50s during the day and into the mid-upper 40s in the early mornings and evenings. 

The good news is that September is a generally drier month than others, so no (or at least fewer) rain showers will prevent you from exploring London on foot or force you to find indoor activities.  (Still though, it’s important to pack for rain in case the weather doesn’t follow its usual trends!)

What to Pack for London in September

Okay, at long last: here’s what you need to pack if you’re visiting London in September. Considering you’ll be visiting in a transition month, it may be tricky to decide which clothes to pack. My advice is that you bring layers, so split your suitcase into light but warm clothes for indoors and mid-weight layers, if it’s cooler or you plan to spend more time outside. 

Specifically, here’s what I recommend packing:

  • Pack two or three natural fiber shirts; I love Unbound Merino’s tops (their long-sleeve options are especially great this month) which are warm but also breathable and odor-reducing so you won’t need to worry about washing them during your trip. They also look nice enough to wear every day when exploring London, which generally has a nicer dress code than many North American urban destinations.
  • Bring a sweater (I’m obsessed with Unbound Merino’s Transit quarter zip), and a jacket or windbreaker. It will be your loyal companion against those chilly mornings and evenings. You probably won’t need a rain jacket (unless the specific forecast for your travel dates says otherwise)…
  • …but you don’t want the rain to stop you from getting to know the marvelous city that London is, if it is damp during your visit. So, bring an umbrella and your rain boots to stay dry.
  • Even if the forecast calls for rain, sunglasses are small enough to pack for sunny days. Various buildings in London can be surprisingly bright on sunny days!
  • Pack three pairs of pants (the American term, not the British one!); I tend to bring all non-denim as it’s less commonly worn, but you can certainly bring and wear a pair of jeans if you choose.
  • Bring 1-2 pairs of comfortable shoes. While you’ll be relying a lot on public transportation during your trip, you’ll spend lots of time walking around. It’s also nice to have a pair of dry non-boot shoes to wear around your hotel or accommodation.
  • Pack a fancy outfit; some venues and restaurants in London are fashionable and you’ll have to dress up if you want to visit them. I love Wool&‘s merino dresses for travel.

I’ve got a list of essentials many people forget to pack for London and a winter packing list you might also want to keep at – both are handy to ensure you don’t forget anything important!

Have any other questions about what to pack for London in September, or any items I didn’t mention that you might need? Let me know in the comments below!

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Valerie fell in love with London on her first trip to the city way back in 2011. Since then, she spent a year living in London and visits as often as she can (you can find her recent trip recaps here!). She launched LOMM in 2021 to help other travelers fall in love with her favorite city on earth.

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