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Climate Change in Hong Kong - Rainfall

Climate Change in Hong Kong
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Rainfall

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Annual rainfall and heavy rain days (hourly rainfall greater than 30 mm) have been recorded at the Hong Kong Observatory Headquarters since January and March 1884 respectively, except for a break during World War II from 1940 to 1946.

Analysis of the annual rainfall showed that there was an increasing rate of 2.3 mm per year during 1884-2023.

Annual rainfall at the Hong Kong Observatory Headquarters (1884-2023). Data are not available from 1940 to 1946.

Annual rainfall at the Hong Kong Observatory Headquarters (1884-2023). Data are not available during 1940-1946.


» Rainfall data

» Rainfall projection

 

Heavy Rain

For the annual number of heavy rain days, there was an increasing rate of 0.1 day per decade during 1884-2023.

Annual number of heavy rain days at the Hong Kong Observatory Headquarters (1884-2023). Data are not available from 1940 to 1946.

Annual number of heavy rain days at the Hong Kong Observatory Headquarters (1884-2023). Data are not available during 1940-1946.

 

Note: The increasing trends of annual rainfall and annual number of heavy rain days during 1884-2023 are statistically significant at 5% level.