Patna witnessed a maximum temperature of 37.9 degrees Celsius and a minimum temperature of 28.6 degrees Celsius, the Met office said.
Gaya recorded a maximum temperature of 40.8 degrees Celsius and a minimum 30.3 degrees Celsius, while Bhagalpur recorded a maximum temperature of 38.4 degrees Celsius and a minimum of 24.8 degree Celsius, it said.
High levels humidity continued to make life difficult for the people in the state.
Patna recorded 72 per cent humidity in the morning, which slided to 49 per cent by the evening. In temple town of Gaya, humidity was 53 per cent in the morning and 41 per cent in the evening.
However, parts of north-west Bihar including West and East Champaran, Saran and Gopalganj and North-Central parts, including Sitamarhi and Madhepura are expected to see rain in the next 24 hours, the forecast said.