U.S. nuclear capacity outages averaged 4.2 gigawatts (GW) during the summer of 2020 (June through August), nearly 35% higher than the 2.7 GW average in summer 2019. Summer nuclear outages were at their lowest level from late June to mid-July, averaging 2.3 GW. Outages significantly increased in the latter half of July, peaking in late July at 6.5 GW and peaking again in August at 6.2 GW.