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File: enso-blog-average-sea-surface-temperature-map--september--2025-04-24.png

Map of average sea surface temperatures for September 1991-2020, centered on the tropical Pacific, showing a reduced 'cold tongue' around the Galapagos Islands.

Average sea surface temperatures during September over the 1991-2020 period. Darker shading indicates comparatively cooler temperatures and brighter shading indicates warmer temperatures. Map by Climate.gov based on analysis by M. L'Heureux.