Temperature and rainfall of Hong Kong under the influence of La Niña

El Niño and La Niña

Temperature and rainfall of Hong Kong during La Niña

La Niña's impact on Hong Kong during spring (Mar-May)

La Niña's impact on Hong Kong during summer (Jun-Aug)

La Niña's impact on Hong Kong during autumn (Sep-Nov)

La Niña's impact on Hong Kong during winter (Dec-Feb)

Spring
Spring (Mar-May) temperature and rainfall of Hong Kong during La Niña in recent decades

	Temperature (°C)	Temperature category⁽¹⁾	Rainfall (mm)	Rainfall category⁽¹⁾
1971	22.5	Above normal	192	Below normal
1974	22.1	Normal	467	Normal
1975	23.1	Above normal	998	Above normal
1985	21.3	Below normal	439	Normal
1989	21.9	Normal	1021	Above normal
1999	23.2	Above normal	378	Below normal

Summer
Summer (Jun-Aug) temperature and rainfall of Hong Kong during La Niña in recent decades

	Temperature (°C)	Temperature category⁽¹⁾	Rainfall (mm)	Rainfall category⁽¹⁾
1971	28.5	Above normal	1284	Normal
1973	27.7	Below normal	1897	Above normal
1975	27.8	Normal	1331	Above normal
1985	27.9	Below normal	1070	Normal
1988	28.5	Above normal	1130	Normal
1999	28.8	Above normal	1293	Above normal

Autumn
Autumn (Sep-Nov) temperature and rainfall of Hong Kong during La Niña in recent decades

	Temperature (°C)	Temperature category⁽¹⁾	Rainfall (mm)	Rainfall category⁽¹⁾
1971	24.3	Normal	221	Below normal
1973	24.3	Normal	490	Normal
1974	24.6	Normal	875	Above normal
1975	24.4	Normal	579	Above normal
1988	24.0	Below normal	197	Below normal
1995	24.7	Normal	560	Normal
1999	25.4	Above normal	420	Normal
2007	24.7	Normal	158	Below normal
2010	24.7	Normal	648	Above normal
2011	25.3	Above normal	382	Normal

Winter
Winter (Dec-Feb) temperature and rainfall of Hong Kong during La Niña in recent decades

	Temperature (°C)	Temperature category⁽¹⁾	Rainfall (mm)	Rainfall category⁽¹⁾
1970-1971	16.0	Normal	103	Normal
1973-1974	15.7	Below normal	41	Below normal
1974-1975	17.1	Above normal	278	Above normal
1975-1976	15.9	Normal	68	Normal
1984-1985	16.1	Normal	243	Above normal
1988-1989	16.7	Normal	133	Above normal
1995-1996	16.7	Normal	36	Below normal
1998-1999	18.4	Above normal	18	Below normal
1999-2000	16.4	Normal	131	Normal
2007-2008	16.2	Below normal	77	Normal
2010-2011	16.0	Below normal	48	Below normal
2011-2012	15.9	Below normal	74	Normal

Note:
1. Categorization of temperature/rainfall is based on the normal distribution constructed from climatological data in the previous 30 years. The categories are defined in such a way that the highest 30% and the lowest 30% of the normal distribution are classified as "above-normal" and "below-normal" respectively, while the middle 40% represents the normal range.