Like-for-like sales lifted 1.9% in its final quarter to August 31 in a marked recovery after it failed to grow sales in a weather-hit March to June period.
Debenhams said the warmer summer weather was "helpful", but also hailed its online performance as sales leapt by 46.2% over the full year.
The fourth quarter turnaround helped same store sales rise 2% overall in the year to August 31.
Debenhams issued a profits warning in March due to the impact of January's snowstorms in what has been a volatile year due to weather conditions, but confirmed today it remained on track to meet City forecasts.
Keith Bowman, equity analyst at Hargreaves Lansdown Stockbrokers, said Debenhams was now "back amongst the pack" following an impressive recovery in recent years.
It has increased its market share in fashion and online thanks to store revamps and the addition of a raft of new designers, including Hammond & Co by Patrick Grant - its first new designer menswear brand for 10 years.
Chief executive Michael Sharp said he was pleased with the performance "in a competitive market where consumers' disposable income remains under pressure".