Delhiites woke up to a cold Monday morning with the minimum temperature settling at 8.3 degrees Celsius, normal for this time of the year.
Humidity was recorded at 97 per cent.
The weatherman has forecast mainly clear skies for the day with moderate fog on Tuesday morning.
Severe cold wave conditions are likely in some parts of the national capital through the day and the maximum temperature may hover around 15 degrees Celsius, according to the Meteorological Department.
The visibility was 1,000 metres at 5.30 am in Safdarjung and was reduced to 600 metres by 8.30 am.
At Palam, the visibility was 700 metres at 5.30 am and had dropped to 500 metres by 8.30 am.
The Air Quality Index (AQI) in the city at 9.44 am was recorded at 310, which falls in the "very poor" category.
An AQI between 0-50 is considered "good", 51-100 "satisfactory", 101-200 "moderate", 201-300 "poor", 301-400 "very poor" and 401-500 "severe". An AQI above 500 falls in the "severe plus" category.
On Sunday, Delhi recorded a high of 14.6 degrees Celsius and a low of 7.4 degrees Celsius.
Railways said 12 trains were delayed due to weather conditions in the northern region as they were running late by 1:45 hours to 6:45 hours.
Trains like Sachkhand Express from Nanded to Amritsar was running late by almost seven hours while the Dibrugarh Express from Dibrugarh to Delhi was running late by three hours.
Pakistani Climbers Rescue Porter's Body A Year After K2 Summit In Pics: Flooded Roads, Waterlogged Streets Across Delhi Amid Heavy Rain Delhi Pollution Under Control Centres Shut Amid Protest Over Fee Hike Life On Earth Originates From One Ancestor, Older Than Previously Believed Villagers Try To Drive Away Elephant With Spiked Rods, Fireballs. It Dies Send Reports Every 2 Hours: Centre To States On Kolkata Horror Protests What Foxconn Boss Said On Row Over Hiring "Discrimination" In India Bengal Health Department Cancels Transfer Order Of 42 Doctors Amid Protests "Illusion": Hamas Official Dismisses US Optimism Over Gaza Ceasefire Talks Track Latest News Live on NDTV.com and get news updates from India and around the world.