Overview

• Delhi also logged a minimum of 28.2°C, five degrees above normal and the highest September night in six years, according to IMD data.
• Humidity pushed the IMD heat index to 44.8°C on Sunday, with relative humidity around 57% elevating heat stress.
• The Southwest monsoon withdrew from Delhi on September 24, its earliest retreat since 2002, and easterly winds and moisture have limited night-time cooling.
• The IMD projects partly cloudy conditions and chances of drizzle on Tuesday and Wednesday, with daytime highs easing to roughly 32–34°C and a gradual cool-down into early October.
• Delhi’s 24-hour average AQI stood at 139 in the moderate band, and IITM/EWS forecasts indicate similar levels this week as early stubble-burning reports show minimal impact so far.