▁in ▁January , ▁and ▁sub - zero ▁temper atures ▁in ▁the ▁far ▁north ▁and ▁Bal och istan . ▁ ▁Cl imate ▁ge ography ▁▁ ▁The ▁mon so on ▁and ▁the ▁Western ▁Dist urb ance ▁are ▁the ▁two ▁main ▁factors ▁which ▁alter ▁the ▁weather ▁over ▁Pakistan ; ▁Cont inental ▁air ▁prev ails ▁for ▁rest ▁of ▁the ▁year . ▁Following ▁are ▁the ▁main ▁factors ▁that ▁influence ▁the ▁weather ▁over ▁Pakistan . ▁ ▁Western ▁Dist urban ces ▁mostly ▁occur ▁during ▁the ▁winter ▁months ▁and ▁cause ▁light ▁to ▁moder ate ▁show ers ▁in ▁southern ▁parts ▁of ▁the ▁country ▁while ▁moder ate ▁to ▁heavy ▁show ers ▁with ▁heavy ▁snow fall ▁in ▁the ▁northern ▁parts ▁of ▁the ▁country . ▁These ▁w ester ly ▁waves ▁are ▁ro bb ed ▁of ▁most ▁of ▁the ▁mo ist ure ▁by ▁the ▁time ▁they ▁reach ▁Pakistan . ▁F og ▁ ▁occurs ▁during ▁the ▁winter ▁season ▁and ▁remains ▁for ▁weeks ▁in ▁upper ▁S ind h , ▁central ▁K hy ber ▁Pak ht unk h wa ▁and ▁ ▁P un j ab . ▁South west ▁Mon so on ▁occurs ▁in ▁summer ▁from ▁the ▁month ▁of ▁June ▁till ▁September ▁in ▁almost ▁whole ▁Pakistan ▁ex cluding ▁western ▁Bal och istan , ▁F ATA , ▁Ch it ral ▁and ▁Gil git – B alt istan . ▁Mon so on ▁ra ins ▁bring ▁much ▁await ed ▁relief ▁from ▁the ▁sc orch ing ▁summer ▁heat . ▁These ▁mon so on ▁ra ins ▁are ▁quite ▁heavy ▁by ▁nature ▁and ▁can ▁cause ▁significant ▁flo oding , ▁even ▁severe ▁flo oding ▁if ▁they ▁interact