north-west-england--isle-of-man_-climate-met-office.pdf
maxima occur in the London area (23.5 °C) whilst the lowest occur in the Shetlands (15 °C). Maximum temperatures are normally 2 or 3 hours a er midday. Extreme maximum temperatures can occur in July or August. For example, on 3 August 1990 a temperature of 34.5 °C was recorded at Knutsford