By Krishna Dua 
Shocking Delhi Weather Record: Wettest May Since 1901 Confirmed by IMD
Delhi has witnessed an unprecedented weather event in May 2025, recording its wettest May in 123 years. The Indian Meteorological Department (IMD) recently confirmed that the capital city received an astonishing 185.9 mm of rainfall during this month, nearly matching the historic record set in 1901. This remarkable event has created widespread reactions across the city and raised important questions about climate patterns, urban infrastructure resilience, and future weather forecasts.
In this comprehensive blog, we delve deep into the causes, impacts, and implications of this shocking Delhi weather record. We also explore what residents can expect in the coming months and how this ties into broader climate change concerns.
The Unprecedented Rainfall in Delhi — Breaking a 123-Year Record
May is typically a pre-monsoon month in Delhi, characterized by rising temperatures and sporadic rainfall. However, May 2025 has deviated sharply from this norm. The Indian Meteorological Department (IMD) confirmed that Delhi recorded 185.9 mm of rainfall, which is just slightly less than the 189.9 mm recorded in May 1901. This makes it the wettest May in Delhi since the early 20th century.
The rainfall was not just heavy but also consistent, with showers and thunderstorms occurring over multiple days. This unusual weather pattern surprised both citizens and meteorologists, prompting many to question the underlying causes.
What Caused This Shocking Delhi Weather Record?
Meteorologists attribute this exceptional rainfall primarily to a combination of two major factors:
1. Strong Western Disturbances
Western disturbances are weather systems originating from the Mediterranean region that bring moisture to northern India. In May 2025, these disturbances were unusually strong and persistent, causing extended periods of rainfall in Delhi and surrounding areas.
2. Moisture-Laden Winds from the Arabian Sea
Along with western disturbances, moisture-rich winds from the Arabian Sea played a crucial role. These winds carried significant amounts of water vapor towards northern India, increasing cloud formation and rainfall intensity.
Together, these atmospheric phenomena resulted in widespread rainfall, breaking the century-old record.
Historical Context: Comparing 1901 and 2025 Rainfall Data
The wettest May before 2025 was recorded in 1901 when Delhi received 189.9 mm of rainfall. At that time, Delhi was far less urbanized, and the city’s infrastructure was less vulnerable to flooding and waterlogging.
In contrast, the 2025 rainfall occurred in a highly urbanized, densely populated metropolis. The increased concrete surfaces and inadequate drainage have exacerbated the effects of heavy rain, causing urban flooding and traffic chaos.
Impact of the Record Rainfall on Daily Life in Delhi
While the rainfall brought welcome relief from the scorching summer heat, it also led to several challenges:
Waterlogging and Flooding
Many low-lying areas in Central and South Delhi experienced waterlogging, making daily commute difficult for residents. Streets turned into temporary water bodies, causing inconvenience and damage to vehicles.
Traffic Disruptions
Flooded roads led to massive traffic jams and delays across the city. Public transport services were also disrupted due to waterlogged routes.
Power Outages
Intermittent power cuts were reported in several parts of outer Delhi due to rainfall and related technical issues. This affected households and businesses, further complicating daily activities.
Health Concerns
Stagnant water and increased humidity created ideal breeding grounds for mosquitoes and other disease vectors, raising concerns about vector-borne diseases such as dengue and malaria.
IMD’s Forecast: What to Expect in June and the Upcoming Monsoon Season
The IMD has issued a forecast for June 2025, indicating above-normal rainfall across northern India, including Delhi. This aligns with the early pre-monsoon rain pattern observed this May.
Experts warn that the monsoon onset could be earlier and more intense than usual, increasing the risk of flooding and waterlogging. Residents and local authorities are advised to prepare for a potentially active monsoon season.
How Are Delhi Residents Responding to the Unusual Weather?
Reactions across the city have been mixed:
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Relief from Heat: Many residents appreciated the rain for breaking the intense heat wave that usually hits Delhi in May.
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Concerns About Infrastructure: At the same time, urban flooding and traffic chaos have led to frustration over inadequate drainage systems and urban planning.
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Rising Demand for Rain Gear: Sales of umbrellas, raincoats, waterproof shoes, and related items have surged.
Climate Change and Its Role in Extreme Weather Patterns
Scientists and environmentalists point to climate change as a key driver behind the rising frequency and intensity of unusual weather events like this one.
How Does Climate Change Affect Rainfall?
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Warmer Air Holds More Moisture: Rising global temperatures allow the atmosphere to hold more water vapor, leading to heavier and more frequent rain events.
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Shifting Weather Patterns: Changes in wind patterns and ocean temperatures can cause disturbances to strengthen or occur more frequently.
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Urban Heat Islands: Cities like Delhi tend to experience localized warming due to concrete surfaces and pollution, potentially intensifying rainstorms.
The wettest May since 1901 may well be a sign of these broader climate shifts.
Preparing for the Future: What Needs to Be Done?
To mitigate the impacts of such extreme weather, several steps are recommended:
1. Improving Urban Drainage Systems
Delhi’s drainage infrastructure needs urgent upgrades to handle heavy rainfall and reduce waterlogging.
2. Enhanced Weather Forecasting and Alerts
Timely and accurate weather predictions can help authorities and residents prepare better for extreme rainfall events.
3. Public Awareness Campaigns
Educating citizens about precautions during heavy rain, such as avoiding flooded areas and using mosquito repellents, can reduce health risks.
4. Climate Action
Efforts to reduce greenhouse gas emissions and promote sustainable urban development are critical to slowing down climate change impacts.
Conclusion: Delhi’s Weather Record is a Wake-Up Call
The shocking record rainfall in Delhi this May is more than just a statistical anomaly—it is a clear indicator of changing climate dynamics and urban vulnerabilities. While the rain brought much-needed respite from the heat, it also exposed the city’s infrastructural weaknesses and the urgent need for climate adaptation strategies.
As Delhi braces for an active monsoon season, residents, policymakers, and environmentalists must work together to build a resilient and sustainable urban future.
FAQs About Delhi’s Wettest May Record
Q1: Is this rainfall pattern normal for Delhi in May?
No, May typically sees limited rainfall. The heavy and sustained showers this year are highly unusual.
Q2: How does this compare with other cities?
Delhi’s rainfall spike is significant, though some other northern cities have also experienced higher-than-average pre-monsoon rains.
Q3: Should residents be worried about floods during the monsoon?
There is increased risk of flooding, so preparedness and infrastructure improvement are essential.
Q4: What role does climate change play in this?
Climate change likely contributed by intensifying weather systems and increasing moisture in the atmosphere.
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