NOAA NCEI historical climate data via the keyless Access Data Service: - Daily summaries (GHCN-Daily): TMAX/TMIN/PRCP by station + date range - Climate normals (1991-2020): annual, seasonal, monthly heating/cooling degree-days (HDD/CDD) - Station + dataset discovery (by bbox or id) CRITICAL USAGE RULES: 1. No auth — keyless /access/services path, NOT the token-gated CDO v2 API 2. Degree-days (HDD/CDD) drive heating-oil / natural-gas / power demand — getDegreeDays() weather-normalizes production/load and models seasonal gas demand 3. Daily temps scaled tenths-°C→°C, precip tenths-mm→mm; degree-days are whole, °F base (65°F) 4. searchStations() (bbox order north,west,south,east) finds station ids for the data methods
5 methodsFreshness not declared
