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Climate Change in Hong Kong - Rainfall

Climate Change in Hong Kong

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Rainfall

Mean sea level>>

At the Hong Kong Observatory Headquarters, information for rainfall and heavy rain days (hourly rainfall greater than 30 mm) have been available 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 average rise of 2.3 mm per year from 1884 to 2021.

Annual rainfall at the Hong Kong Observatory Headquarters (1884-2021). Data are not available from 1940 to 1946.

Annual rainfall at the Hong Kong Observatory Headquarters (1884-2021). Data are not available from 1940 to 1946.


» Rainfall data

» Rainfall projection

 

Heavy Rain


For the annual number of heavy rain days, there was an average rise of 0.2 day per decade from 1884 to 2021.

Annual number of heavy rain days at the Hong Kong Observatory Headquarters (1884-2021). Data are not available from 1940 to 1946.

Annual number of heavy rain days at the Hong Kong Observatory Headquarters (1884-2021). 

Data are not available from 1940 to 1946.

 

Note: The increasing trends of annual rainfall and annual number of heavy rain days during 1884-2021 are statistically significant at 5% level.