Dense fog blanketed parts of the national capital on Wednesday morning, reducing visibility and disrupting over 100 flights and 26 trains.
The minimum temperature dropped to 6 degrees Celsius, 1.4 notches below normal, as the city experienced another chilly morning.
The India Meteorological Department (IMD) reported minimum visibility of 200 metres in moderate fog with calm winds at Safdarjung and 150 metres in dense fog with calm winds at Palam around 5:30 am.
All runways at IGI Airport are operating under CAT-III conditions, with the Runway Visual Range (RVR) ranging between 75 and 300 metres.
Delhi airport operator DIAL said while landings and takeoffs continue at the airport, flights that are not CAT III-compliant may get affected.