Get heating, cooling and growing degree-days for any location over a date range within the rolling ~5-year ERA5 window (reanalysis): energy-demand and crop-growth signals computed from daily mean temperature, decoded from GRIB. Also accepts city=<name> (alias location=, optional country= ISO 3166 alpha-2) instead of lat/lon, resolved via the embedded GeoNames gazetteer (exact match, most populous wins) and echoed back as data.location. No account, no key, pay per call.

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