Overview

• Delhi hit 38.1°C on Sunday, the warmest September day in two years, and a 28.2°C minimum that matched the highest September night in six years, followed by 37.5°C/28.2°C on Monday.
• The Southwest monsoon withdrew from Delhi on September 24, the earliest since 2002, with clear skies and elevated humidity driving daytime heating and unusually warm nights.
• IMD reported a heat index near 44.8°C on Sunday with relative humidity around 57%, underscoring the discomfort despite the absence of heatwave criteria.
• Short-term forecasts point to generally cloudy conditions and light rain or drizzle on Tuesday, with temperatures trending toward the low to mid-30s this week.
• Air quality improved from an AQI of 169 on Saturday to 139 on Sunday and 120 on Monday, as early-season stubble burning reached about 130 incidents and the first FIR was filed in Mohali on September 29.