Ground check: does NASA's record match a real thermometer?

The NOAA GHCN-Daily station at Charlotte Douglas International Airport and NASA POWER daily maximum temperature for the same coordinates are tested with the same seasonal trend method as Trend Check, 1981–2025.

Upload a CSV from any temperature logger, such as a Bosch BME688 or BME280 board, to compare your spot with the NASA grid cell on the same days. The file stays in your browser.

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