Keylong in tribal Lahaul district witnessed the coldest night of the season last night with mercury plunging to minus 17 degrees Celsius.
Bharmaur and Kalpa in tribal areas recorded minimum temperatures at minus 16 degrees Celsius and minus 7 degrees Celsius while the tourist resort of Manali shivered at minus 6.6 degrees Celsius, five notches below normal.
The Hindustan-Tibet National Highway was opened via Narkanda but vehicular traffic was not restored due to slippery road conditions while Chopal and Nerwa areas of Shimla remained cut off for the fourth day.
Minimum temperatures hovered around freezing point at Shimla, Chamba, Sundernagar, Bhuntar and Dalhousie at 0. 2, 0.3, 0.4 and 0.8 degrees Celsius respectively.
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Hamirpur recorded a low of 1 degrees Celsius followed by Palampur 1.5, Kangra 1.6, Solan 2, Una 3.4, Dharamsala 3.8 and Nahan 4.4 degrees Celsius.
Maximum temperatures rose significantly by four to five degrees and Una was hottest with a high of 22.4 degrees Celsius followed by Sundernagar 21.4, Solan 19.5, Bhunter 18.2, Nahan 16.3, Dharamsala 15.8, Shimla 13.9 and Kalpa 1.4 degrees Celsius.
The MeT office predicted mainly dry weather in the next 24 hours.