According to data from the India Meteorological Department (IMD), during June-September of this year, India received 87.4 percent of its Long Period Average (LPA) rainfall, making this monsoon the fourth lowest since 2001.
The country recorded 759.4 mm of rainfall against a normal seasonal average of 868.6 mm, indicating a deficit of approximately 13 percent for the period from June 1 to September 30. IMD reported this on Wednesday.
Seasonal rainfall was characterized by uneven distribution across various regions of the country; despite heavy rains at the end of the monsoon period, many areas registered significant deficits.
A senior IMD official told Reuters that India received 12.6 percent less rainfall than the average for June-September, with the El Niño weather pattern contributing to the weakening of precipitation. The meteorological department forecasts that India is likely to receive below-normal rainfall in October, and most regions are expected to see below-average rainfall from October to December.
The LPA used by IMD denotes the average amount of rainfall recorded in a specific region over a set period, calculated based on a long-term period, usually spanning 30 to 50 years. The 2026 monsoon was the first deficit season since 2015. IMD classifies seasonal rainfall as deficient if it is 10 percent or more below the LPA.
The monsoon started with a rapid advance after reaching Kerala on June 4, which was three days later than usual, but then stalled for almost two weeks before reaching North-West India in the first week of July. In June, the country faced a rainfall deficit of over 35 percent, the highest figure in 12 years.
Rainfall activity increased in subsequent months due to the formation of several low-atmospheric systems over the Bay of Bengal, which moved inland. Four such systems formed in July, six in August, and three in September, including a deep depression that moved along the coast from North Andhra to South Odisha on September 23-24. These systems helped ensure a substantial amount of rainfall in central and eastern parts of India, thereby reducing the overall seasonal deficit.
However, the impact of this deficit varied greatly depending on the region. Odisha recorded the wettest monsoon in the last 20 years, while the Eastern and Northeastern region approached the driest monsoon since data collection began in 1901. South India experienced a rainfall deficit exceeding 23 percent, making it the driest Southwest Monsoon since 2002. Western Rajasthan recorded a deficit of 31 percent, and rainfall in Punjab was 42 percent below normal.
IMD's final assessment was made after a late storm of heavy rains reduced the country's overall deficit, but the June-September season still concluded significantly below the long-term average.


