The impact of El Niño and La Niña on Hong Kong rainfall

El Niño and La Niña

Seasonal and annual rainfall charts

Spring - El Niño brings generally more rainfall to Hong Kong compared to the ENSO-neutral state.

Spring (March-May) rainfall of Hong Kong, 1950-2015

Summer - On average, rainfall recorded in Hong Kong during El Niño is slightly less than that under the ENSO-neutral state. However, the difference is not statistically significant.

Summer (June-August) rainfall of Hong Kong, 1950-2015

Autumn - On average, rainfall recorded in Hong Kong during El Niño is comparable to that under the ENSO-neutral state. The difference is not statistically significant.

Autumn (September-November) rainfall of Hong Kong, 1950-2015

Winter - El Niño brings generally more rainfall to Hong Kong compared to the ENSO-neutral state.

Winter (December-February) rainfall of Hong Kong, 1950-2015

Annual

Annual rainfall of Hong Kong

Note:
1. The ENSO-neutral state refers to the situation with neither an El Niño nor a La Niña in place.
2. The annual rainfall chart is synthesized from the seasonal charts.