Mumbai Monsoon 2026: Warmest June Night On Record, Monsoon Nowhere In Sight — And Skymet Says It Could Get Worse

Mumbai recorded its warmest June night ever on Friday, with the minimum temperature holding at 30.2 degrees Celsius — a record matched simultaneously at Harnai along the Maharashtra coast, signalling an unusually widespread spell of nighttime heat gripping the region.

The record-breaking figure means the city failed to cool down even after sunset, leaving residents struggling through oppressive heat and humidity. Experts warn the record could be broken again in the coming days if current atmospheric conditions persist.

At the heart of the problem is the delayed southwest monsoon. The IMD has now projected its arrival in Mumbai around June 25 — a delay of at least 15 days from the city's normal onset date — while private forecaster Skymet has warned the delay could stretch even further.

The monsoon's northward march has stalled over Maharashtra since June 8, leaving Mumbai caught between lingering pre-monsoon conditions and the expected onset of widespread rainfall. The season was originally anticipated to reach the city around June 10-11.

Under normal circumstances, persistent monsoon clouds and frequent rain showers keep temperatures in check and allow nights to cool. This year, however, clear to partly cloudy skies and the absence of sustained rainfall have allowed heat and moisture to accumulate relentlessly over the city.

Compounding the misery are strong moisture-laden winds blowing in from the Arabian Sea. The humidity they carry acts like a blanket over the city after sunset, trapping heat close to the surface and slowing the nighttime cooling that Mumbai residents usually rely on for relief.

Dry air intrusions over central India and the absence of strong weather systems over the Arabian Sea have further stalled the monsoon's advance. Until it regains momentum, Mumbai and the Konkan coast could see more record-warm nights — with no meaningful relief in sight before June 25.