SeasonScore
London, United Kingdom
Photo: Diliff · CC BY 3.0

United Kingdom

London in September

🍂 Autumn

Pleasant and some showers.

Best months: Jul (9.6), Sep (9.6), Jun (9.5)

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Why September scores 9.6What goes into the score

How it works
🌡️ 21° / 14°C🌧️ 54 mm💧 dew pt 11°🍃 PM2.5 5
  • Weather comfort9.6
    • ✓Comfortable temperatures (21°C highs / 14°C lows)
    • ✓Comfortable humidity (dew point 11.4°C)
    • ✓Mostly dry (~54 mm rain)
  • Air quality10.0
    • ✓Good (within WHO guideline) (PM2.5 ~5 µg/m³)
  • Seasonal hazards10.0
    • ·No notable seasonal hazards
  • Safety baseline7.5
    • ·Increased caution
Compare monthsPut September side by side with another month
SepJul
Score9.6 Excellent9.6 Excellent
Season🍂 Autumn☀️ Summer
High / low21° / 14°24° / 16°
Rain54 mm54 mm
Humiditydew pt 11°dew pt 13°
PM2.55 µg/m³6 µg/m³

Typical-month data: NASA POWER (MERRA-2 reanalysis) 2015–2024 (modelled, not a forecast). Temperatures: London Weather Centre weather-station normals.

Holidays & crowdsSeptember 2027

No long holidays

No long public-holiday weekends this month. School holidays aren't counted, so check those if you want to avoid family crowds.

No national public holidays in United Kingdom this month.

National holidays only; regional holidays and school breaks aren't included. Source: holidays (open-source public-holiday calendar).

Explore LondonEvents, sights, food & souvenirs

Check event dates locally

The UK's capital on the Thames, visited for royal landmarks, world-class museums, theatre, parks and diverse neighbourhoods.

Events in September

No major events on our calendar for September.

Coming up later

New Year's Eve fireworksEvery year31 December every year

Fireworks over the Thames at midnight.

Why go: Viewing areas are ticketed.

Where: River Thames by the London Eye

Chelsea Flower ShowDate variesUsually late May

A garden and flower show.

Why go: Tickets sell out well ahead.

Where: Royal Hospital Chelsea

Trooping the ColourDate variesUsually a Saturday in June

A military parade marking the monarch's official birthday.

Why go: Stand along The Mall early.

Where: The Mall and Horse Guards Parade

Plan this tripTickets, data and transfers for London

Airport transfer Kiwitaxi

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