In August, Hemel Hempstead typically sees daytime highs of 20.4°C and overnight lows around 12.0°C. Compared to the annual average high of 13.1°C, August runs +7.3°C.
August in Hemel Hempstead averages a daytime high of 20.4°C and an overnight low of 12.0°C.
August runs +7.3°C compared to Hemel Hempstead's annual average high of 13.1°C, ranking #2 of 12 months by warmth.
Plan for daytime highs near 20.4°C and cooler evenings around 12.0°C.