In August, London typically sees daytime highs of 20.8°C and overnight lows around 12.3°C. Compared to the annual average high of 13.6°C, August runs +7.3°C.
August in London averages a daytime high of 20.8°C and an overnight low of 12.3°C.
August runs +7.3°C compared to London's annual average high of 13.6°C, ranking #2 of 12 months by warmth.
Plan for daytime highs near 20.8°C and cooler evenings around 12.3°C.