Best time to visit London: May–September.
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May–September is the best window to visit London. The warmest, driest stretch of London's famously changeable weather.
November–February is the stretch to avoid if possible. Cold, frequently rainy, and daylight can run out before 4pm.
Not necessarily — weather and crowd timing don't always match the cheapest airfare windows. Check our Best Time to Book Flights tool separately for pricing.
Usually yes — the weeks just before or after London's best window often have nearly as good weather with noticeably fewer crowds and lower prices.