Yes I was wondering the same. Why is the mean using a different set of years than the total data set? There also seems to be a year where the swing was equally as extreme in the other direction, what year was this? Would be worth mentioning at least in the post.

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penteract an hour ago | parent [-]

Based on https://climatereanalyzer.org/clim/sst_daily/?dm_id=nino3.4, 1988 is the year from the dataset with the lowest temperature throughout June and July.

	▲	card_zero 11 minutes ago \| parent [-]
		I posted a comment earlier about how 1982-1983 (the start of the data) had a historically severe El Nino, and the comment got shadowbanned. I don't understand why that happens sometimes. Hasn't happened for months, but when it does it's always on innocuous factual comments, it's weird.