John Lewis saw sales soar by 15.5% to more than £112 million in the week ended Saturday, marking its third consecutive record week.
The figure also beat the same week in 2007 by 11.4%. Online sales growth was more muted, up 7% on the same week last year.
Unsurprisingly outerwear sales were a standout performer in the icy conditions, while kidswear was also strong.
Singer analyst Matthew McEachran described the figures as “extremely encouraging” but warned that they should not be taken as reflective of the sector as a whole, because of the strength of John Lewis’s online offer and the fact that the department store’s London Oxford Street and Peter Jones branches were unaffected by snow and helped by tourist spending.