Iritty has a humid climate with an oppressive hot season from March to the end of May. This is followed by the South - West Monsoon season that continues till the beginning of October. From October to December is the Northeast Monsoon season and the two months January and February are winter season. The climate is pleasant from September to February. The rainfall during July is very heavy and receives 68% of the annual rainfall during this season.
The winds over the Iritty regions are seasonal and predominantly from the east in the period from December to February and from west in the rest of the year. During the months of December and January the temperature is low and the minimum temperature is about 18-20 degree C. ( On certain days the night temperature may go down to 12-14 degree C, although this is extremely rare ). During the months of April and May, the mean daily maximum temperature is about 35 o C.