Leave the wheeled case behind for the British Museum
Bring a soft day bag for a British Museum visit. Wheeled cases are not permitted on its premises, even small ones; a cabin suitcase that works for your flight therefore does not work for this stop.
Keep the bag within 40 × 40 × 50 cm and 8 kg, and leave room to open it for the security search. On a train or flight day, arrange luggage storage before arriving. Contact the museum ahead of time if you need to keep larger luggage with you for medical reasons.
Historical climate behind this guide
The figures use ERA5 reanalysis supplied by Open-Meteo, covering 2014–2023. These are ten-year historical means, not a forecast or a 30-year climate normal. Daily highs and lows are averaged in °C; rainfall is the mean calendar-month rain total in mm, excluding snowfall. Check a current forecast shortly before departure; individual days can be much hotter, colder or wetter.
Coordinates, method and source request
Requested city point: 51.5074, -0.1278. Returned model grid point: 51.5, -0.25. Daily boundaries: UTC. Retrieved 2026-09-28. Model: era5. Temperatures average all available daily maxima/minima; monthly rain totals are divided by ten years. All 3,652 daily records were checked for completeness. Reanalysis estimates a grid area, not a specific street or weather station.
Reproduce this city’s data request · Data attribution / CC BY 4.0
London in May: what changes in your bag
Historical mean daily low/high: 8.9–17.3°C; mean monthly rainfall: 55.1 mm.
May supports lighter walking clothes, but the low average still warrants a sweater for early starts. Keep a rain layer for long days away from your accommodation.
Packing advice is our interpretation of the linked climate data, not a guarantee of conditions.
Planning a trip to London, United Kingdom in May? This comprehensive packing guide covers everything you need based on the local weather and activities. A global metropolis blending historic landmarks with cutting-edge culture and cuisine.
Weather in London in May
Essential Packing List for London in May
👕 Clothing
- ✓ Light jacket or blazer
- ✓ Mix of long and short sleeve shirts
- ✓ Light sweater for evenings
- ✓ Comfortable walking shoes
- ✓ Versatile pants or jeans
- ✓ Light layers for variable weather
☔ Rain Gear
- ✓ Compact umbrella
- ✓ Light rain jacket
What to Wear in London in May
Daytime highs in London in May average 17.3°C (63°F), dropping to around 8.9°C (48°F) at night — a mild temperature range for packing decisions. (Pleasant spring.)
Build your wardrobe around a base layer plus a light sweater or fleece you can add or shed through the day, and water-resistant walking shoes. Use the difference between the daytime high and overnight low to choose layers: mornings and evenings feel several degrees cooler than the afternoon high, and indoor spaces add another variable. Choose two colour families so every top works with every bottom — this can make it easier to reuse pieces across several outfits instead of packing a separate set for every day. Prefer quick-dry fabrics such as merino or synthetic blends over slow-drying cotton where you can; check the care label and allow enough drying time before relying on a sink wash. Carry a spare layer if your accommodation has limited drying space.
Footwear deserves the most scrutiny: the monthly rainfall average is 55.1 mm, which helps with broad planning but does not predict rain on your travel dates. Choose shoes suitable for your planned walking and check the forecast before deciding whether waterproof footwear is needed. Wear new shoes at home first so you can identify fit problems before leaving for London.
Packing for London: 3, 7 and 14-Day Plans
Use the length of your stay in London as a starting point, then adjust for activities, laundry access, weather and any equipment you need. These examples are planning options, not guarantees that a particular bag size will fit everything:
- 3-day trip: begin with a compact set of outfits that share layers and shoes. A small bag may work for a light itinerary, but bulky winter clothing, work equipment or personal needs can change the space required.
- 7-day trip: decide whether you will wash clothes. With access to laundry, you may be able to reuse a smaller wardrobe; without it, allow enough clean changes for the full week. Keep an extra change accessible for travel delays.
- 14-day trip: plan laundry stops if you want to limit clothing volume. If washing is impractical, increase quantities and check that your selected luggage can accommodate them rather than assuming one carry-on will be enough.
Lay out the items before choosing your final bag. Check its packed weight and external dimensions against the allowance for your airline, fare and route. A bag's capacity in litres does not by itself establish whether it qualifies as cabin baggage.
Finally, compare the list with your actual itinerary. Dinners out, hiking and business meetings can require different clothing even on trips of the same length. Remove duplicate items where a suitable piece serves more than one purpose, while keeping essentials you personally need.
Laundry & Re-Wear Strategy for May
The climate table for London in May lists average highs of 17.3°C and 55.1 mm of monthly rainfall. These figures do not measure humidity or tell you how quickly laundry will dry in your accommodation. On cooler days, you may be able to rewear outer layers, depending on activity, cleanliness and comfort. Decide what can be reworn after use rather than following a fixed number of wears.
Start with your trip length, your access to laundry and the care instructions on your clothes. If a wash is practical mid-trip, pack enough clean underwear and socks to reach that point, plus a spare set for delays. Without laundry, allow for fresh changes throughout the trip. Confirm that your hotel or rental has a suitable washing and drying option before counting on it; a sink wash only helps if the fabric can dry before you pack or wear it again.
Keep clean and worn items separate, air reusable layers between outings, and check the short-range forecast before departure. Rainy weather may make outdoor drying less convenient, but monthly rainfall alone is not a reason to assume that a hotel laundry service will be available.
Things to Know About London
- 💡 UK uses Type G plugs (different from EU)
- 💡 Drive on the left side
- 💡 Tipping 10-15% in restaurants
- 💡 Oyster card for public transport
Popular Activities in London
Frequently Asked Questions
What is the weather like in London in May?
What should I pack for London in May?
What are popular activities in London?
Explore Other Destinations in May
London in Other Months
London Weather Data by Month
| Month | High (°C) | Low (°C) | Rainfall (mm) |
|---|---|---|---|
| January | 8.1°C | 2.9°C | 60.7mm |
| February | 9°C | 3.5°C | 46.1mm |
| March | 11.1°C | 4.6°C | 47.5mm |
| April | 14°C | 5.7°C | 40.7mm |
| May | 17.3°C | 8.9°C | 55.1mm |
| June | 20.8°C | 12.3°C | 62.1mm |
| July | 22.8°C | 14.3°C | 52.9mm |
| August | 21.9°C | 13.9°C | 66.2mm |
| September | 19.7°C | 11.8°C | 46.2mm |
| October | 15.6°C | 9.3°C | 73.8mm |
| November | 11.2°C | 6°C | 64.2mm |
| December | 9.3°C | 4.7°C | 61.3mm |