Delhi Weather Update: Humid Heat and Rain Alerts as Monsoon Withdrawal Begins

Residents of the national capital are currently experiencing a volatile transition in delhi weather, characterized by "humid heat" and unsettled skies. As of mid-September 2026, the city is navigating the final stages of the southwest monsoon, with the India Meteorological Department (IMD) projecting the monsoon's withdrawal from parts of western Rajasthan to begin around September 19, 2026 [2].

Current Temperature and Humidity Trends

Recent data from September 17, 2026, shows that weather delhi remains warm and damp. The minimum temperature settled at 25.2°C, though significant variations were noted across the city: The Ridge recorded a low of 20.6°C, while Ayanagar reached 24.8°C [1]. Maximum temperatures have hovered around 34°C to 35°C.

A critical factor contributing to the discomfort is the relative humidity, which was recorded at 60% on the morning of September 17 [1]. This combination of high heat and moisture often creates a "humid heat" sensation, making the actual temperature feel higher than reported.

Rainfall Alerts and Atmospheric Drivers

The weather new delhi has been influenced by a low-pressure area situated over Saurashtra and the northeast Arabian Sea [2]. This system, along with the monsoon trough, has led to unsettled conditions across the NCR.

• Yellow Alert: A yellow alert was issued around September 16 for heavy rainfall, thunderstorms, and gusty winds [2].
• Short-term Forecast: For September 17, the IMD predicted generally cloudy skies with light rain or drizzle at isolated places [1].

Air Quality Index (AQI) Status

Amidst the rain and humidity, Delhi's air quality remains in a transitional phase. On the morning of September 17, the Air Quality Index (AQI) was recorded at 105, which falls under the 'moderate' category according to the Central Pollution Control Board (CPCB) scale [1]. This is a typical reading for this period, as monsoon rains help scrub pollutants from the air before the winter smog typically sets in.

Delhi Weather Summary (September 16-17, 2026)

Parameter	Observation/Forecast	Source
Min Temperature	25.2°C (Avg) / 20.6°C (The Ridge)	IMD via ThePrint
Max Temperature	~34°C to 35°C	IMD
Relative Humidity	60% (Morning of Sept 17)	ThePrint
AQI	105 (Moderate)	CPCB
Alert Level	Yellow (Heavy Rain/Thunderstorms)	Down To Earth