Chandigarh's maximum settled at 44 deg C, up by four notches, the MeT said.
Amritsar in Punjab sizzled under the heat, with maximum settling at 45.5 deg C, an increase of four degrees.
Patiala and Ludhiana recorded near similar maximums at 45.1 deg C and 45 deg C respectively.
Hisar and Rohtak in Haryana recorded identical highs of 45 deg C while Karnal's high settled at 44 deg C, up four degrees.
Sweltering heat prevailed in Ambala, which recorded a high of 43.9 deg C while Narnaul sizzled at 44.6 deg C.