Delhi today got warmer. The city inched towards the onset of summer with mercury creeping up above normal level aided by a bright sun. The minimum crossed the 15 degree Celsius mark for the first time this winter to touch 15.1 degrees, one degree above normal for this time of the year, signaling the approaching summer. The Weatherman said the mercury is likely to rise in the coming days and for tomorrow, the MeT office has predicted a clear sky with temperature between 14 and 27 degree Celsius.