India's monsoon this year was the weakest since 2015, weather data shows. Rainfall stayed below the normal range through the season.

The June-to-September rains are vital for the country. They water nearly half of India's farmland and fill reservoirs.

A weak monsoon can hit farm output. It may push up food prices and add to inflation pressure.

Officials are assessing the impact on kharif crops. Sowing was affected in several states.

The poor rains also raise concerns for water supply. Reservoir levels in some regions are lower than usual.

Economists say the effect on growth will depend on the winter crop. Good rabi sowing could offset some of the damage.

The India Meteorological Department tracks the monsoon. A normal season means rainfall between 96 and 104 per cent of the long-term average. This year's total fell short of that band. The department issues its first forecast in April and updates it through the season.