Historical daily weather observations from NOAA GHCN-Daily for one station and date range (up to 366 days per call): max/min/avg temperature (°C), precipitation (mm), snowfall and snow depth (mm), wind (m/s). Coverage reaches back to the 1800s for long-running stations — actual measured values for "what was the weather on this date", not model recall. Pass a GHCN station id (e.g. USW00094728 = NYC Central Park); find the nearest station for any coordinate with /api/climate/station-near first. dataTypes selects elements (default TMAX,TMIN,PRCP). NOAA public-domain data.