Only 2015 & 1997 were warmer in Niño 3.4 over the same time period, dating back to 1981.
The key #ElNino monitoring region in the equatorial Pacific, Niño 3.4, has registered a 30-day anomaly of 2.0˚C above average for the first time during this El Niño event — @BenNollWeather #ENSO