Thunderstorms Thunderstorms in Hong Kong occur mainly in spring and summer months. On average, thunderstorms are reported at the Observatory in about 5 days each month from April to September.
Thunderstorm is a localized phenomenon.
As a result, thunderstorms affecting one part of the territory may not affect other parts. Thunderstorms may or may not be accompanied by rain. They are usually accompanied by lightning which can damage electrical installations, cause fires and induce death by electrocution. Violent gusts often occur in squall lines associated with thunderstorms. Boats are known to have capsized in thunderstorm-related squalls.