New Delhi:  A spell of light rainfall early yesterday added to the prevailing chill in the Indian capital.

It helped, however, to ease the heavy fog and flight operations at the city's airport, but rail services continued to remain hit, with 50 trains affected.

"There is a western disturbance over Jammu and Kashmir, because of which Delhi witnessed light rainfall in the morning," an India Meteorological Department (IMD) official told IANS.

"The sky will remain cloudy through the day with the possibility of more rain later. There will be rain until Friday," the official said.

The rain cleared the intense fog and improved visibility, he added.

Flights at the Indira Gandhi International Airport operated normally, as visibility was better than in the past three days when many international and domestic flights were either diverted or cancelled, an airport official said.

However, rail services from and to the capital city remained disrupted.

According to a railway spokesperson, 50 trains were affected by the fog and the Gujjar stir in Bayana in Rajasthan. Of these, six trains were re-scheduled and nine were cancelled.

Thirty-five trains, including the super-fast Rajdhani Express coming from Jammu Tavi, were delayed between two to 52 hours.

Another important train, the Garib Rath coming from Bandra in Mumbai, was also delayed by 52 hours.

The minimum temperature in the city recorded early in the morning was a notch above average at 7.9 degrees Celsius. The maximum is expected to hover around 20C.