The biggest increases reported on Saturday were from the United States, Brazil, India and South Africa, according to a daily report. The previous WHO record for new cases was 237,743 on Friday.
Deaths rose by 7,360, the biggest one-day increase since May. 10. Deaths have been averaging 4,800 a day in July, up slightly from an average of 4,600 a day in June.
Total global coronavirus cases surpassed 14 million on Friday, according to a Reuters tally, marking another milestone in the spread of the disease that has killed nearly 600,000 people in seven months.
The WHO reported 71,484 new cases in the United States, 45,403 in Brazil, 34,884 in India and 13,373 in South Africa.
India on Friday became the third country in the world to record more than 1 million cases of the new coronavirus, behind only the United States and Brazil. Epidemiologists say India is still likely months from hitting its peak.
Cases in Brazil crossed the 2 million mark on Thursday, doubling in less than a month and adding nearly 40,000 new cases a day.
A patchwork of state and city responses has held up poorly in Brazil in the absence of a tightly coordinated policy from the federal government.
The United States, which leads with world with over 3.7 million cases, has also tried to curb the outbreak at the state and local levels with only limited success.