In August, Cardiff typically sees daytime highs of 19.7°C and overnight lows around 12.4°C. Compared to the annual average high of 13.4°C, August runs +6.3°C.
August in Cardiff averages a daytime high of 19.7°C and an overnight low of 12.4°C.
August runs +6.3°C compared to Cardiff's annual average high of 13.4°C, ranking #1 of 12 months by warmth.
Plan for daytime highs near 19.7°C and cooler evenings around 12.4°C.