hy ol ite ▁of ▁ext inct ▁vol cano es ▁att est . ▁The ▁most ▁spect ac ular ▁of ▁these ▁lie ▁in ▁the ▁valley ▁by ▁the ▁tour ist ▁village ▁of ▁Rh ums iki . ▁The ▁part ▁of ▁the ▁range ▁that ▁lies ▁within ▁the ▁Far ▁North ▁is ▁on ▁a ▁middle ▁plate au ▁at ▁about ▁ 8 0 0 – 9 0 0 ▁metres . ▁Is ol ated ▁mountains ▁continue ▁into ▁the ▁Diam ar é ▁P lain . ▁The ▁mountains ' ▁northern ▁extent ▁is ▁h illy , ▁disse cted ▁by ▁a ▁number ▁of ▁rivers . ▁ ▁Cl imate ▁The ▁Far ▁North ▁is ▁hot ▁and ▁dry . ▁Begin ning ▁at ▁ 1 0 ° ▁N , ▁the ▁climate ▁is ▁tropical ▁and ▁Sah elian , ▁and ▁ra inf all ▁is ▁a ▁relatively ▁small ▁ ▁per ▁year , ▁with ▁ra ins ▁falling ▁a ▁bit ▁more ▁frequently ▁in ▁the ▁Mand ara ▁region . ▁South ▁of ▁ 1 0 ° , ▁the ▁region ▁west ▁of ▁the ▁May o ▁K é bi ▁and ▁south ▁to ▁the ▁border ▁with ▁Ch ad , ▁in ▁the ▁Cam ero onian ▁be ak . ▁Here , ▁climate ▁is ▁tropical ▁of ▁the ▁Sud an ▁type , ▁with ▁higher ▁ra inf alls ▁of ▁ ▁per ▁year . ▁Tem per atures ▁average ▁, ▁except ▁for ▁the ▁Ch ad ▁Bas in , ▁where ▁they ▁clim b ▁to ▁. ▁Act ual ▁temper atures ▁of ▁course ▁fl uct uate ▁with ▁the ▁seasons , ▁however . ▁At ▁K ouss éri , ▁for ▁example , ▁there ▁is ▁an ▁ ▁difference ▁between ▁January ▁() ▁and ▁August