The climate of this Districts is on the whale dry and bracing .The year can be divided in to three main seasons. The cold seasons from November to March, the hot season from March to May and the monsoon season from June to September, October is a transitional month between monsoon and winter seasons.
The only observatory in the District is located at Daltonganj .The meteorological data of this station can be taken as representative for the Districts. The cold season starts from November and continues till as out the middle of February December and January are the coolest month. In association with cold waves which occasionally pass over the area in the wake of western disturbances minimum temperatures can go down to the freezing point of water on individual days in the December of January. In the southern part of the Districts in the high Plateau, frost occur in December of January by March temperature begins to rise steadily. In may and early point of June the maximum temperature can be as high as 47degree C on individual days .The effect of the extreme summer heat is some what alleviated by the dryness of the air and the strong breezes that blow in the afternoons. The daily range of temperature is of the order of 16 degree to 17 degree C during the winter and summer month while in the monsoon months it is only 6 degree C to 8 degree C.
Relative humidity is generally lower in the afternoons than in the mornings, excepts in the monsoon months when there is little differences .The summer months are the driest with humidity as law as 20 to 25 percent in the afternoon.
During the summer and winter months sky is generally clear or lightly clouded .In April and May cloudiness increases particularly in the afternoon. During the monsoon months sky is heavily clouded to overcast.
Winds are light to moderate during the winter and summer months, the speed being higher in the afternoons. In association with thunder storms during March to May and during the monsoon season when depressions pass west word across the central parts of the country .the Districts to may experience strong gusty winds .The directions from which winds blow are variable specially during the monsoon season.