ArerajAreraj is a town and a notified area in East Champaran district in the state of Bihar, India.DemographicsIndia census, Areraj had a population of 26,014 with males constituting 52% of the population and females 48%. Areraj has an average literacy rate of 45%, lower than the national average of 59.5%; with 64% of males and 36% of females literate. 20% of the population is under 6 years of age.ClimateClimate is characterised by high temperatures and evenly distributed precipitation throughout the year. The Köppen Climate Classification sub-type for this climate is "Cfa".