It's pretty rare to see NINO 4 region Sea Surface Temperature Anomalies (SSTa) below -1°C in northern summer, like they currently are (plots via @cyclonicwx).

Fwiw, in ERSSTv5, the last time NINO 4 SSTa were below -1°C in July was 1938

👀 pic.twitter.com/bm4ZgRhWEL

— Eric Webb (@webberweather) July 17, 2022