The large forest reserves favourably affect the climate and induce more rain in the district. In the mountain ranges, chilling cold is experienced, whereas lower down the climate is bracing and in the plains, it is generally hot. Though the mean maximum temperature is only around 90 F, it is oppressive in the moisture-laden atmosphere of the plains. Humidity is high and rises to about 90 per cent during the southwest monsoon. The average rainfall is around 150 cms per annum. It is significant that the district gets rainfall both from the southwest and the northeast monsoons. The southwest monsoon starts by the end of May or from the beginning of June and fades out by September, while the northeast monsoon commences in October. Dry weather sets in by the end of December. December, January and February are the coolest months of the year. March, April and May are generally very hot. During the months of April and May, the mean daily maximum temperature rises upto 35 degree Celsius and in the days of December-January, it may go down to 20 degree Celsius.
