The Hong Kong Observatory today said more significant rainfall returned to Hong Kong in July and it issued the Hurricane Signal No. 10 on July 20 during the strike of typhoon Wipha.
 
The rainfall in July was mainly due to the remnant of tropical cyclone Danas in early July and typhoon Wipha in mid-July, as well as showers associated with troughs of low pressure and active southwesterly airstreams.
 
The monthly rainfall was 601.7 mm, about 56% above normal. However, with the rainfall well below normal in the first half of the year, the accumulated rainfall recorded in the first seven months of 2025 was only 1,046.1 mm, a deficit of 29% compared to the normal amount of rainfall for the same period.
 
The month was also warmer than usual, with the monthly mean maximum temperature of 32.4 degrees, 0.8 degrees above the normal and one of the ninth highest on record for July.
 
The monthly mean temperature of 29.5 degrees was 0.6 degrees above normal.
 
On July 7, the maximum temperature recorded at the Observatory was 34.3 degrees, the hottest Moderate Heat ever recorded.
 
Wipha skirted about 60 km south of the Observatory towards noon on July 20 and many places were affected by storm to hurricane force winds during the day.
 
More than 70 mm of rainfall were generally recorded over Hong Kong that day, and rainfall even exceeded 200 mm over parts of the city. 
 
On July 29, the Observatory issued the first Black Rainstorm Warning of the year. 
 
Eight tropical cyclones occurred over the South China Sea and the western North Pacific in July, the Observatory added.