Mercury dipped further in most parts of north India today with Leh region in Jammu and Kashmir recording the season's lowest at minus 16.2 degrees Celsius. Srinagar recorded a low of 5.2 degrees Celsius. <br/> <br/>Delhiites woke up to a chilly Christmas morning with the minimum temperature settling at 5.5 degrees Celsius, two notches below normal for this time of the season. <br/><br/>In Rajasthan, mercury plummeted in parts of the state where Churu remained the coldest place with a minimum temperature of 0.4 degree Celsius, near freezing point, according to weather office.<br/><br/>Intense cold wave swept Punjab and Haryana with Amritsar recording the lowest temperature of minus 0.3 degrees Celsius in the region. Reeling under severe cold conditions, Amritsar recorded mercury at minus 0.3 degrees Celsius four notches below normal, a weather office report said.<br/><br/>In Himachal Pradesh, intense cold wave conditions continued to reel in the hills and valleys of the State but tourists were disappointed as 'White Christmas' eluded Shimla.