Scope: Hong Kong public datasets and government data.
Fetch real-time HKO (Hong Kong Observatory) weather feed.
Historical weather (any prior date) is available via mirrored HKO tables (1884-2026).
dataType (choose ONE per call): rhrread : Regional current weather (temp/rain/humidity per station) warnsum : Active warnings summary. Codes: WHOT (very hot), WRAINY/A/R/B (rain amber/red/black), WTCSGNL (typhoon signal 1/3/8/9/10), WFIRE Y/R (fire danger), WFNTSA (thunderstorm), WFROST, WCOLD. Empty {} means no active warnings. flw : Local weather forecast (today's general outlook) fnd : 9-day forecast swt : Special weather tip
lang: "en" | "tc" | "sc"