Hisar in Haryana sizzled at four degrees above normal, the local MeT Department said.
Most places across the two states, including Chandigarh recorded the season's hottest day so far, as mercury hovered few notches above normal level.
Bhiwani was sizzling today with the sun beating down since morning and the day temperature shooting up to 43 degrees Celsius, three notches more than normal.
Karnal and Narnaul sweltered at 42 degrees Celsius each. Ambala, too, had a hot day at 41.1 degrees Celsius, three notches above normal.
In Punjab, Patiala sizzled at 42.1 degrees Celsius, up five degrees.
The MeT has forecast no immediate relief from the sweltering conditions.