Rainfall

High Rainfall days in India’s districts in SW Monsoon 2025

An analysis of the daily district wise rainfall data from India Meteorological Department (IMD) for India’s South West Monsoon 2025 (June-Sept rainfall was 937.2 mm, 8% above normal) shows that there were 2224 (2555 in 2024 SW Monsoon) instances when a district rainfall of a day was above 50 mm. Out of 738 districts of India, 510 districts or, about 69% of the districts experienced such high rainfall days during SW monsoon 2025.

Such high rainfall instances included 1920 instances when rainfall was 50-100 mm, 247 instances when it was 100-150 mm, 38 times it was 150-200 mm and 19 times above 200 mm.

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Rainfall

High Rainfall days in India’s districts in Sept 2024: Highest numbers in East India

An analysis of the daily district wise rainfall data from India Meteorological Department (IMD) for the month of September 2024, the last month of India’s South West Monsoon 2024 shows that there were 546 (406 in Sept 2023[i], 417 in Sept 2022[ii] and 489 in Sept 2021[iii]) instances when district rainfall of a day was above 50 mm. Such high rainfall instances included 438 (330, 365 and 374 in Sept 2023, Sept 2022 and 2021 respectively) instances in Sept 2024 when rainfall was 50-100 mm, 73 (64, 47 and 84 in Sept 2023, Sept 2022 and 2021 respectively) instances in Sept 2024 when it was 100-150 mm, 30 (10, 3 and 20 in Sept 2023, Sept 2022 and 2021 respectively) times in Sept 2024 when it was 150-200 mm and 5 (2, 2 and 11 in Sept 2023, Sept 2022 and 2021 respectively) instances in Sept 2024 when rainfall in a day was above 200 mm.

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Rainfall

Pre Monsoon 2024 season: District wise rainfall in India

In the just concluded three month pre monsoon season (March 1 to May 31, 2024) India received 125.9 mm (146.6 mm in Pre Monsoon 2023[i]) rainfall, 4% below (12% above in per monsoon 2023) the normal rainfall of 130.6 mm as per the India Meteorological Department (IMD). In 2020[ii] , 2021[iii] and 2022[iv] India received 158.5 mm, 155.2 mm and 130.6 or 20% above normal, 18% above normal and 1% below rainfall respectively. So this year, India has received the lowest pre monsoon season rainfall compared to that those in previous four years.

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