It all comes down to what’s being measured.
Satellites like Copernicus Sentinel-3 measure land surface temperature — that’s the heat coming directly from the ground, not the air above it. And yes, it’s often hotter in the summer than what your app tells you.
📹 European Space Agency (ESA)
📸 Contains modified Copernicus Sentinel data (2025), processed by ESA
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This week’s edition of the Earth from Space programme features a Copernicus Sentinel-3 image showing the scale of Britain’s heatwave as it baked in extreme temperatures in August.
Download the image: https://www.esa.int/ESA_Multimedia/Images/2022/09/UK_heatwave
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