In August, St Helens typically sees daytime highs of 19.1°C and overnight lows around 11.4°C. Compared to the annual average high of 12.6°C, August runs +6.5°C.
August in St Helens averages a daytime high of 19.1°C and an overnight low of 11.4°C.
August runs +6.5°C compared to St Helens's annual average high of 12.6°C, ranking #2 of 12 months by warmth.
Plan for daytime highs near 19.1°C and cooler evenings around 11.4°C.