In July, Hemel Hempstead typically sees daytime highs of 20.6°C and overnight lows around 12.0°C. Compared to the annual average high of 13.1°C, July runs +7.5°C.
July in Hemel Hempstead averages a daytime high of 20.6°C and an overnight low of 12.0°C.
July runs +7.5°C compared to Hemel Hempstead's annual average high of 13.1°C, ranking #1 of 12 months by warmth.
Plan for daytime highs near 20.6°C and cooler evenings around 12.0°C.