After meeting Singh's kin at Kamarji village near Gaurichak in Patna district, Modi left for Kaimur district to meet family of another blast victim, police officials said.
Modi arrived here late on Friday to meet the families of those killed in a string of explosions and spent his night at the state guest house, which was virtually turned into a fortress.
"Modi's visit to Gaurichak to meet family member of Singh was delayed due to bad weather Saturday morning. The airport authorities cautioned of low visibility for chopper to fly. Later when the weather improved, Modi first visited Gaurichak," a district police official said.
Senior BJP leader Nand Kishore Yadav, who accompanied Modi, said that the Gujarat chief minister also interacted with the family members.
Modi will visit six villages spread across six districts by helicopter Saturday.
Six people were killed and more than 80 injured when half a dozen bombs exploded in Patna Sunday morning, most of them in and around the sprawling Gandhi Maidan where Modi later addressed a huge rally.
Most of those killed and injured were activists or supporters of the Bharatiya Janata Party.
Modi will hand over a cheque of Rs.5 lakh to the next of kin of each blast victim.