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Live forecasts update automatically; written guidance last reviewed 23 June 2026 by the Australia Pulse Weather Desk. Data from the Bureau of Meteorology (BOM) and other national met services via Open-Meteo.
Live data from Open-Meteo · updates automatically ·
London in September sees average highs of 20–22°C and lows of 11–13°C, with roughly 50–60mm of rain across 10–12 wet days. This means mild, often pleasant conditions with a noticeable shift toward cooler autumn weather by late in the month.
What is the typical weather pattern for London in September?
September in London marks the transition from summer to autumn. The live forecast above shows the current conditions, but historically the month brings a mix of sunny spells, increasing cloud cover, and occasional light rain. Humidity remains moderate, and daylight shortens from about 13.5 hours to 11.5 hours by month’s end. This is one of the more comfortable months for walking and sightseeing, though a light jacket is often needed by evening.
How does September compare to October and early autumn?
September is distinctly warmer and drier than October. Average highs drop by roughly 3–4°C into October, and rainfall increases. For those asking about london weather september october, the key difference is that September still holds onto summer warmth, while October brings more persistent rain and cooler winds. Weather in september uk overall is similar to London’s, though northern areas such as september weather in edinburgh are typically 3–5°C cooler and wetter.
What should I wear in London in September?
Layers are key: a light sweater or long-sleeved shirt, a waterproof jacket, and comfortable walking shoes. Evenings can be cool, so a scarf or light coat is useful. For weather in london in september what to wear, think mild autumn clothing with rain protection.
Does it snow in London in September?
No, snow in September is extremely rare in London. The average temperature stays well above freezing, with the lowest recorded September minimums around 3–5°C. Any precipitation falls as rain, not snow.
Is September a good time to visit London?
Yes, it is one of the best months for tourism. Crowds are smaller than summer, temperatures are pleasant for outdoor activities, and hotel rates often drop. Just pack for changeable conditions, including occasional rain.
Sources
For more on UK conditions, see our Weather Forecast London page. Explore other European destinations like Venice Weather or Santorini Weather. For Australian comparisons, visit our Australia weather hub. Note that london weather september fahrenheit equivalents are roughly 68–72°F for highs.