10 trains were running late due to foggy conditions in the northern region, a Northwestern Railway spokesman said.
The trains, including Hawrah-Jodhpur Express and Sialdah-Ajmer Express, are running late from 55 minutes to 4 hour 35 minutes, he said.
Sikar saw a minimum of 4.4 degrees Celsius, Pilani 4.5 deg C, Chittorgarh 4.6 deg C, Mount Abu 5 deg C, Sriganganagar 5.5 deg C, Jaipur 6 deg C and Ajmer 7.1 deg C, a Met report said.