A wave of bombings in Baghdad province killed 65 people and wounded 190 on Saturday night, officials said, pushing the death toll for July past 500.
Twelve car bombs and a roadside bomb struck Baghdad, while another bomb hit Madain to the south of the capital, a police colonel and a medical official said.
The bombs struck as Baghdad residents turned out to shop and relax in cafes after iftar, the meal that breaks the daily fast during the Muslim holy month of Ramadan.
In the deadliest attacks, two car bombs killed 12 people in the Karrada, while two car bombs and a roadside bomb hit Zafraniyah, both areas in central Baghdad.
Saturday's attacks came a day after a suicide bomber killed 20 people inside a crowded Sunni mosque north of Baghdad, as Iraq struggles to contain its worst violence since 2008.
Iraq has faced years of attacks by militants, but analysts say widespread discontent among members of its Sunni minority, which the government has failed to address, has fuelled this year's surge in unrest.