Washout summer to erupt into glorious Autumn of colour Experts at the Forestry Commission are predicting that autumnal colours will last longer than usual, with leaves staying on the trees well into November. "Autumn's foliage displays are certainly affected by the weather," said Simon Toomer, the Forestry Commission's Director at Westonbirt, The National Arboretum in Gloucestershire. The intensity and longevity of colour varies from one year to the next. Luckily, different conditions suit different plants and each year new, and sometimes surprising trees will provide the star turn. This year we could see prolonged autumn colour well into November due to the mild, damp weather conditions. Mr Toomer also expects colours to be more intense this year than normal, although he warned that heavy storms could bring the "autumn show" to an abrupt end., According to the latest forecast from the Met Office, the balmy weather is coming to an end and the coming week will see Autumn setting in with temperatures dropping from 63F (17c) to 57F (14c) by Friday. Much of the week will be blustery with heavy rain in particular tomorrow followed by lighter showers, while rural areas will experience overnight ground frost.