The mercury plunged to minus 11.5 degrees Celsius in Keylong.
High altitude tribal areas reeled under arctic conditions with the mercury staying 12 to 20 degrees below the freezing point while mid and lower hills shivered under sub-zero temperature.
Manali and Kalpa recorded a low of minus 4.0 and minus 3.6 degrees Celsius.
Una in Shivalik foothills adjoining Punjab recorded a low of minus 2.5, followed by Bhuntar minus 1.0, Solan and Sundernagar minus 0.5 degree, Palampur 0.5 degree, Dharamsala 5.8 degree and Nahan 6.0 degrees Celsius. State capital Shimla recorded a minimum of 1.7 degrees Celsius.
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Thick ground frost occurred in mid and higher hills making driving risky on slippery roads and resulting in freezing and bursting of water pipes while dense fog disrupted normal life in lower hills during the morning hours, which dissipated as the day advanced.
The extreme low temperature is considered beneficial for apple crop as it would help in ensuring requisite chilling hours for bumper apple crop.