Jan. 2025 Climate Fact Check: NASA Data Shreds ‘Hottest January Ever’ Claim

by S. Millay, Feb 13, 2025 in ClimateChangeDispatch


This summary serves as a fact check on the most egregious false claim about climate change made in the media in January 2025. [emphasis, links added]

Counter-Narrative Reality vs. Counter-Reality Narrative

It was a busy January keeping track of President Trump’s first steps toward dismantling the federal government’s Climate Leviathan. It was also a very cold January and that’s what this edition of Climate Fact Check will cover.

Per the relatively unmanipulated NASA satellite data, January 2025 is estimated to have witnessed a substantial drop of 0.34°C from last January concerning the made-up metric of “average global temperature.”

This is despite that atmospheric carbon dioxide increased from about 422 parts per million (ppm) in January 2024 to 426 parts per million in January 2025.

That 4 ppm increase in carbon dioxide is worth about 78 billion tons of emissions. Therefore, 78 billion more tons of carbon dioxide in the atmosphere resulted in a January that was 0.34°C cooler than the previous January.

February is typically the coldest average month in the Northern Hemisphere. January 2025 was cooler than February 2016 and about the same as January 2016 and February 1998, hundreds of billions of tons of CO2 and a decade of “warming,” ago.

Faced with the counter-narrative reality of the NASA satellite data, the desperate climate hoax machine produced a counter-reality narrative, claiming that January was the hottest ever as in this Associated Press report.