north-east-england_-climate-met-office.pdf
are the warmest months, with mean daily maximum temperatures ranging from about 21.5 °C in South Yorkshire to less than 17 °C in the higher Pennines. The highest July mean 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