Bihar has a diverse climate . Its temperature is subtropical in general , with hot summers and cold winters . Bihar is a vast stretch of fertile plain . It is drained by the Ganges River , including its northern tributaries Gandak and Koshi , originating in the Nepal Himalayas and the Bagmati originating in the Kathmandu Valley that regularly flood parts of the Bihar plains . The total area covered by the state of Bihar is . the state is located between 24 ° -20 ' -10 " N ~ 27 ° -31 ' -15 " N latitude and between 83 ° -19 ' -50 " E ~ 88 ° -17 ' -40 " E longitude . Its average elevation above sea level is
flood
2008 Bihar flood
Bihar