2 December 2025

With the dominance of dry northeast monsoon over southern China for most of the time in the month, the weather of November 2025 was much drier than usual in Hong Kong. The monthly mean relative humidity of 60 percent was 12 percent below the normal of 72 percent and one of the fourth lowest on record for November. The total rainfall in the month was 7.0 millimetres, only about 18 percent of the normal of 39.3 millimetres. The accumulated rainfall this year up to November was 2552.2 millimetres, about 6 percent above the normal of 2402.4 millimetres for the same period. The monthly mean temperature of 22.3 degrees was near the normal of 22.2 degrees. Mainly attributing to the exceptionally hot weather in September and October, the autumn of the year from September to November was much warmer than usual. The autumn mean minimum temperature of 24.4 degrees, mean temperature of 26.3 degrees and mean maximum temperature of 28.9 degrees were respectively one of the second highest, the third highest and one of the fourth highest on record for the same period.

Under the influence of the northeast monsoon, it was dry with sunny intervals on the first two days of the month. With a band of clouds covering southern China, local weather turned cloudy with one or two light rain patches on 3 – 4 November. While there were sunny periods on 5 – 6 November, gloomy and rainy weather returned on 7 November with a band of clouds covering southern China. As an anticyclone aloft strengthened gradually, the weather turned generally fine during the day on 8 November and remained so in the following two days. With plenty of sunshine, the temperature at the Observatory rose to a maximum of 28.9 degrees on 9 November, the highest of the month.

Besides, the tropical depression to the south of Guam intensified into a tropical storm on the morning of 6 November, and was named Fung-wong. Fung-wong continued to move generally northwestwards and intensified progressively into a super typhoon in the following three days. It moved across Luzon on the morning of 10 November and weakened into a typhoon. Fung-wong turned to move northwards over the northeastern part of the South China Sea on 11 November and weakened gradually under the influence of the northeast monsoon. It skirted the southern part of Taiwan the next night and weakened into an area of low pressure with frontal characteristics.

Under the combined effect of Fung-wong and the northeast monsoon, local winds reached strong force occasionally offshore and on high ground on 10 – 11 November. The outer rainbands of Fung-wong brought a few light rain patches on 11 November. There was also minor flooding over some low-lying areas during the high tide on the night of 10 November and the early morning of 11 November. Dominated by a dry northeast monsoon, apart from the cloudier weather with a few rain patches on 13 November and the next morning, the weather of Hong Kong was generally fine and dry on 12 – 17 November.

A cold front reached the coast of southern China on the early morning of 18 November. Under the influence of the associated intense northeast monsoon, the weather became appreciably cooler and windy during the day and the next day. The temperature at the Observatory dropped to a minimum of 13.2 degrees on the morning of 19 November, the lowest of the month. The weather remained very dry in the following three days. The relative humidity over most parts of the territory stayed below 40 percent on 20 – 21 November. With the band of clouds thinning out, cloudy weather on 19 – 20 November turned generally fine during the day on 21 November and remained so in the following three days.

A strong replenishment of the northeast monsoon reached the coast of southern China on 25 November. The weather was generally fine and very dry on 25 – 26 November. With another replenishment reaching the coastal areas of Guangdong, the weather remained generally fine and very dry on 27 November and the next two days. The relative humidity at the Observatory once fell to 16 percent on 27 November, equalling the lowest on record in November since the establishment of the automatic weather station at the Observatory’s Headquarters in 1984. With a band of clouds covering southern China on the last day of the month, while the weather remained dry locally, it was mainly cloudy with one or two light rain patches at night.

Four tropical cyclones occurred over the South China Sea and the western North Pacific in November 2025.