Annual mean air temperature (normal)

Notes and definition

No English note has been written for this figure yet. The value and its source are registered, but the compilers have not yet set out what the figure covers in English. Do not treat the absence of a note as “no caveat”: read the official document linked above, or the Chinese page (which may carry a note).

Other figures in this group (climate)

Figures in the same group are not necessarily additive — check the basis note above first. Climate.

Other figures from the same official source

These figures come from the same registered document: “Hong Kong in Figures, 2026 Edition” (Census and Statistics Department). Being in one document does not make them additive.

74 more figures come from the same document; see Climate.

Verified questions that cite this figure

• When do typhoons hit Hong Kong?

  Tropical cyclones can affect Hong Kong at any time of year but cluster in late summer and early autumn. In practice, what matters is the Observatory’s warning signal — 1, 3, 8, 9 or 10.

• Why is Hong Kong so hot, humid and rainy?

  Hong Kong has a subtropical climate: the annual mean temperature is about 23.5°C and annual rainfall about 2,431.2 mm. Summer heat comes from the ocean, the monsoon and the density of the built city.

• Why is athlete’s foot called “Hong Kong foot” in Chinese?

  “Hong Kong foot” is the Chinese colloquial name for athlete’s foot (tinea pedis). It dates to the nineteenth and early twentieth centuries, when British troops and residents in Hong Kong’s hot, humid climate commonly developed the infection — the name followed them home. The condition is not unique to Hong Kong.

• What is the hottest temperature ever recorded in Hong Kong and which was the hottest year?

  The Hong Kong Observatory daily series since 1885 shows a clear rise in both mean temperature and hot nights in recent decades. The annual mean of 24.6°C in 2023 was among the warmest on record; very hot days reach 36.1°C or above and trigger the Very Hot Weather Warning.

• When is the rainiest time of year in Hong Kong, and how does the Observatory measure rainfall and typhoons?

  Hong Kong rainfall concentrates in late spring, early summer and the summer months under the monsoon and typhoon seasons. The Observatory publishes monthly and annual rainfall, typhoon tracks and tropical-cyclone statistics with explicit reporting periods.

• When is the rainy season in Hong Kong?

  Hong Kong’s mean annual rainfall is about 2,431 mm (1991–2020 normal), concentrated from May to September with July the wettest month; winter (December–February) is drier. Summer typhoons and the south-west monsoon bring heavy rain.

• Why is Hong Kong so humid and muggy?

  Hong Kong has a sub-tropical monsoon climate; from early to late summer the south-west monsoon brings high temperature, heavy rain and persistently high humidity. The annual mean temperature is about 23.5°C (1991–2020 normal), so muggy heat is common in summer.

（已核對問題頁目前只有中文版；上面嘅英文標題同答案本身係資料檔嘅官方英文欄位。）

How to cite this figure

Hong Kong Story, “Annual mean air temperature (normal)”, https://hongkongstory.org/en/facts/temp-annual-normal, data as at 1991-2020 (retrieved ＿).

中文：香港紀事館，〈全年平均氣溫（正常值）〉，https://hongkongstory.org/facts/temp-annual-normal，資料時點 1991-2020（查閱日期 ＿）。

Machine-readable: /api/v1/facts.json (id = temp-annual-normal) · OpenAPI 3.1 ·/llms.txt

Registered source

• Hong Kong in Figures, 2026 Edition

  Census and Statistics Department

  Official document dated 2026-04; last checked by this site 2026-09-05.

This site is a secondary compilation: the official text prevails. If the figure above differs from the official document, the official document is correct.