Kanchipuram generally experiences hot and humid climatic conditions throughout the year. Temperatures reache an average maximum of 37.5 °C (99.5 °F) between April and July, and an average minimum of 20.5 °C (68.9 °F) between December and February. The daytime heat during summer can be oppressive; temperatures can reach 43 °C(109 °F). Relative humidities of between 58% and 84% prevail throughout the year. The humidity reaches its peak during the morning and is lowest in the evening. Relative humidity is higher between November and January and is lowest throughout June.
The city receives an average of 1064 mm of rainfall annually, 68% of which falls during the northeast monsoon. Most of the precipitation occurs in the form of cyclonic storms caused by depressions in the Bay of Bengal during the northeast monsoon. The prevailing wind direction is south-westerly in the morning and south-easterly in the evening
