According to a report in the Daily Telegraph today, retailers in the US are already seeking advice as a result of unpredictable weather patterns, and the newspaper said the UK and Europe are set to follow suit.
Founder of Milan Fashion Week Beppe Modenese said: "The whole fashion system will have to change. There is no strong difference between summer and winter anymore."
Modenese added: "People are not prepared to invest in these clothes that, from one season to the other, use the same fabrics at the same weight."
In the UK, the Met Office has forecasted that temperatures will rise to 20 degrees in the South-East this weekend, about six or seven degrees warmer than usual for this time of the year. This is likely to knock autumn trade out of kilter with shoppers unlikely to splash out on this season's heavy knitwear and coats in rising temepatures.
Similarly the UK suffered its wettest spring on record this year, which left fashion retailers overstocked with the season's lightweight styles.