Retail sales fell by 3.3 per cent in November year on year, according to the latest figures released on Tuesday from the Federal Statistics Office.
The decline continued a downward trend that began in October.
But the Federal Statistics Office said it believed sales had picked up towards the end of the year.
"Positive reports on Christmas business lead one to expect a strong final spurt in retail sales in December 2000," it said.
The office said unseasonably warm weather in November had stifled sales of winter clothing and shoes. Overall clothing sales fell by 5.8 per cent year on year.
Food, drink and tobacco slipped by 2.3 per cent.
swissinfo with agencies