May is the warmest month of the year in Hyderabad. Day temperatures soar to 40° C regularly and the nights aren’t too cool at an average of 24° C. The wettest month is September, which gets 165 mm of rain. It is also quite wet in July, only marginally less so than September. The coolest months are November, December and January when day temperatures hover around 28°/29° C. At night the temperature drops to around 16° C. There’s hardly any rain at this time.