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Live forecasts update automatically; written guidance last reviewed 16 June 2026 by the Canada Perspective Weather Desk. Data from Environment and Climate Change Canada and other national met services via Open-Meteo.
Live data from Open-Meteo · updates automatically ·
London’s weather is typically cool, damp and changeable, with mild winters and warm but rarely hot summers. The live forecast above shows today’s conditions; seasonal averages below give a broader picture for anyone planning travel or moving from Canada.
What is the typical weather in London UK?
London has a temperate maritime climate, heavily influenced by the Atlantic Ocean. Winters (December–February) see average highs near 8 °C and lows around 3 °C, with frequent cloud and rain. Snow is occasional but rarely heavy. Summers (June–August) bring average highs of 22 °C, though heatwaves can push temperatures above 30 °C for a few days. Spring and autumn are transitional, often pleasant but unsettled. Rainfall is spread throughout the year, with no true dry season.
What seasonal tips should visitors know?
Spring (March–May) is the most unpredictable: warm sunny days can give way to showers within hours. Summer offers the best chance of dry weather, but be prepared for occasional rain. Autumn (September–November) often feels crisp and clear, while winter is grey but rarely severe. For the most reliable warmth, June to August is best; for fewer crowds and lighter rain, May or September work well.
What is the best time to visit London for weather?
Late May to early September offers the highest temperatures and most sunshine, with average highs of 20–23 °C. July and August are warmest but also wettest on average; June often provides a good balance of warmth and lower rainfall.
How does London’s weather compare to a Canadian city like Toronto?
London is much milder in winter (around 5 °C vs Toronto’s −5 °C) and cooler in summer (23 °C vs 27 °C). London gets more rain days but less snow and fewer temperature extremes. Its maritime climate is more consistent year-round.
Does London ever experience extreme weather?
London occasionally faces heatwaves (above 30 °C), heavy downpours causing flash flooding, and rare gale-force winds. Snowfall of more than a few centimetres is uncommon. The Met Office issues warnings when conditions pose a risk.
For a broader picture of weather across Canada, visit our Canada weather hub. Compare London’s climate with Toronto weather or check current weather warnings in your area. For longer-range planning, look up weather london 14 days, weather london uk 7 days, and weather in london tomorrow; for extended outlooks, explore weather in london 10 days, london weather 30 days, london weather 15 days, and weather london 21 days. For a trusted UK perspective, check the bbc weather london 15 day forecast.