The mercury, which was running 6 to 8 degrees above normal for the past two weeks, plummeted after rains and thunderstorm lashed the area, which also extinguished forest fires in lower and mid-hills.
The maximum day temperature dropped by 14 degrees from 37.8 deg to 23.8 deg at Bhuntar, while Sundernagar recorded maximum temperature at 29.4 deg from 39.4 deg yesterday.
Solan and Shimla recorded a high of 27 deg and 24 deg against 36.4 deg and 30.8 deg yesterday while Kalpa and Una registered maximum temperatures at 18 deg and 37.2 deg, a drop of 8 and 6 deg C respectively.
The traffic on Rohtang Pass (13,050 ft) which was opened for tourist vehicles from yesterday was again suspended and several buses which left for Lahaul via Rohtang Pass had to return fresh snowfall and rains made driving hazardous.
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The state capital Shimla was lashed by heavy rains and thunderstorm which lasted about two hours causing sharp fall in mercury.
Strong velocity winds swept the region and sky remained heavily overcast, providing much needed relief from heat.
Several areas in Kangra and Una also received rains bringing cheers to farmers who were facing problem of fodder for animals due to prolonged dry spell and soaring temperature.
Several areas had mild rains last evening and Manali recorded 15 mm of rains, followed by Keylong and Chamba 8 mm each, Dehragopipur 7 mm, Seobagh and Una 5 each and Bhuntar and Bajura 4 mm each till this morning.
The rains were considered beneficial for paddy sowing in lower hills and stonefruit crop in mid and higher hills.