Sales at homewares retailer Dunelm - which has five stores here - were melted by "unusually warm weather" in the first quarter, which meant fewer customers in shops.
Like-for-like sales at the company plummeted 5.1% in the 13 weeks to October 1, dragging down revenue by 1.8% to £198.7m.
Chief executive John Browett said: "As expected, the homewares market has fallen due to unusually warm weather and this has correspondingly impacted our store performance over the period, given the reduced footfall to our out-of-town superstores."
Mr Browett added that he was looking forward to a stronger second quarter as the firm invests in extra seasonal space, new till systems, shop refits and store openings.
It has said it is planning to ramp up expansion, taking shop numbers from 157 to 200.
Dunelm has branches in Belfast, Newtownabbey, Coleraine, Ballymena and Londonderry.