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File: SSTA-May2026-1991-2020-climo-ENSOpage.jpg

Spherical map centered on tropical Pacific Ocean showing warm sea surface temperature anomalies across the equator in red and orange colors

Sea surface temperatures in the Pacific Ocean in May 2026 compared to the 1991-2020 average. Temperatures across the equator were warmer than average (orange, red), a sign that El Niño had emerged. Climate.us image, based on NOAA OISST data.