Mumbai

Mumbai Monsoon Shock: August Rainfall Drops 66% Below Normal Following Heavy July

Mumbai's monsoon saw a dramatic shift in August 2026, with the Colaba observatory recording only 164.5 mm of rain—66% below normal. This follows a massive 1176.5 mm in July. The India Meteorological Department (IMD) attributes the dry spell to El Nino conditions. Regional deficits were also high, with Marathwada at 69% and the state average at 44% below normal. Forecasters expect light rain for the next few days but predict a drier-than-usual September.

Shweta Talpade

Shweta Talpade

Sep 6, 2026

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This article was curated with AI assistance and published by the MBN News Desk.

Mumbai Monsoon Shock: August Rainfall Drops 66% Below Normal Following Heavy July
AI Generated ImageSource: MBN News Desk

Key Takeaways

  • Mumbai August rain was 66% below normal levels
  • Colaba recorded second lowest rain in 35 years
  • El Nino conditions are blamed for the dry spell

Wow, talk about a weather whiplash! Mumbai's climate really decided to pull a fast one on us this year, going from absolutely drenched in July to suddenly bone-dry in August. And honestly, it’s a dramatic shift that has everyone talking.

The numbers coming from the India Meteorological Department, the IMD, are pretty stark. They recently put out data showing that our city’s rainfall was a whopping 66% below the usual average for the month of August. This comes as a real shock, especially since it feels like just yesterday we were dealing with flooded streets and those heavy downpours that made July one of the wettest we've seen in recent memory.

Specifically, the Colaba observatory, which keeps an eye on the island city's weather, recorded a measly 164.5 mm of rain for all of August. That’s a pretty staggering drop when you compare it to the massive 1,176.5 mm we got in July. And get this, historical records show this is actually the second-lowest amount of rainfall Mumbai has experienced in 35 years for the month of August. That’s quite a statistic, isn't it? This sudden lack of rain is definitely making people wonder about the overall health of our monsoon season.

It’s not just the main city, either. Mumbai’s suburbs fared slightly better, but still saw a 44% deficit, which, while a bit better than the island city, is still notably below normal. Then you look at regions like Marathwada, a big agricultural area, and they’re facing a whopping 69% shortage. That’s the highest deficit in the entire state for August, and that’s genuinely worrying for farmers. Even the Konkan region, which usually gets absolutely drenched, is down by 33%. You really notice it when even the coastal belt isn’t getting its usual heavy rains.

The IMD had apparently cautioned earlier that the 2026 monsoon might be heavily influenced by El Nino climatic conditions. So, even though July started with that crazy, intense burst of rain, this current dry spell actually lines up with those long-term warnings meteorologists gave us before the rains even began.

Across the entire state of Maharashtra, the picture is pretty grim all around. The Vidarbha region, for instance, is staring at a 58% deficit, and Madhya Maharashtra recorded 31% less rain than its typical levels. When you average it all out, the entire state of Maharashtra wrapped up August with a 44% rainfall deficit. That’s a huge number. What these numbers really tell us is that after that initial peak in July, the monsoon currents just couldn’t keep up their strength, and that’s hitting everywhere, from our cities to the crucial farming areas.

A few things really stand out about this sudden dry spell:

  • Mumbai went from one of its wettest Julys to the second-lowest August rainfall in 35 years.
  • El Nino conditions were previously flagged as a potential disruptor for the monsoon.

And if you’re hoping for things to turn around in September, well, the prospects are looking pretty slim, unfortunately. The IMD’s latest monthly outlook for the final phase of the monsoon is predicting below-average rainfall again. So, it doesn’t look like we’ll be seeing a return to those torrential July conditions anytime soon. This forecast definitely adds more pressure on the city’s water management, especially as the monsoon season starts winding down.

For the next couple of days, meaning the next 48 hours, Mumbai residents can probably expect mostly cloudy skies with a few light rain spells here and there. Temperatures are expected to be around 31°C for the max and stay near 27°C for the min. While those light showers might offer a tiny bit of relief from the humidity, let’s be real, they’re not going to fix the huge rainfall deficit August left us with. The local forecast basically says we’ll be stuck in this pattern of light, scattered precipitation for the whole coming week.

But beyond the city’s immediate comfort, this deficit is really, really concerning for Maharashtra’s agricultural heartlands. Think about Marathwada and Vidarbha, for instance, with their shortfalls of 69% and 58%. Farmers there must be incredibly worried. These areas absolutely rely on consistent moisture during the middle part of the monsoon, and they just haven’t gotten it.

Source: MBN News Desk
#Mumbai Monsoon#IMD#Mumbai Weather#El Nino#Maharashtra Rainfall#Colaba Observatory#Climate Change#Water Supply#BMC#Mumbai News

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