Thiruvananthapuram Climate

The large forest reserves favourably affect the climate and induce rain Cold weather is experienced in the mountain ranges whereas lower down, the weather is bracing and in the plains, it is generally hot. Though the mean maximum temperature is only around 900F, it is oppressive in the moisture-laden atmosphere of the plains. Humidity is high and rises to about 90 per cent during the south-west monsoon.

The average rainfall is around 150 cms per annum. It is significant that the district gets rainfall both from the south-west and the north-east monsoons. The south-west monsoon starts by the end of May/beginning of June, and fades out by September, while the north-east 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 hot.

During the months of April and May, the mean daily maximum temperature rises upto 35.20 celsius and during December-January, it sometimes goes down to 18.00 celsius.