The eight core sector industries -- coal, crude oil, natural gas, refinery products, fertiliser, steel, cement and electricity -- grew by 3.2 per cent in November last year.
The growth rate was 6.3 per cent in October this year. The earlier high was in June when the sectors grew by 7.3 per cent.
The core sector contributes 38 per cent in the overall industrial production, a parameter that RBI takes into account while framing its monetary policy.
Steel output during the month under review declined to 1.3 per cent from 10.1 per cent in the same month last year.
However, crude oil, natural gas and fertiliser were in the negative zone.
During April-November, the eight sectors grew by 4.6 per cent as against 4.1 per cent in the same period last year.