Hong Kong recorded 790.3 mm of rain in July 2026, according to the Hong Kong Observatory. That was 404.5 mm above the 1991–2020 July normal of 385.8 mm, meaning the city received more than twice its usual rainfall.
The final total makes July 2026 Hong Kong’s second-wettest July since records began in 1884. It was also the wettest July in 32 years, overtaking the 746.0 mm recorded in 1997.
For residents, the figure helps explain why the month felt relentlessly wet. Repeated rainstorms, troughs of low pressure and tropical cyclones brought periods of unsettled weather.
The continuous rain also made July slightly cooler than normal. The mean temperature was 28.7°C, while the mean maximum and minimum temperatures were 31.1°C and 26.6°C respectively.
Top 10 Wettest Months in Hong Kong
These are among the highest monthly rainfall totals recorded at the Hong Kong Observatory (records from 1884 onward):
- June 2008 — 1,346.1mm
- May 1889 — 1,241.1mm
- July 1994 — 1,147.2mm
- August 1995 — 1,090.1mm
- June 2001 — 1,083.6mm
- September 2023 — 1,067.1mm
- August 2005 — 971.3mm
- June 1966 — 962.9mm
- August 2025 — 939.2mm
- June 1959 — 913.7mm
July 2026 does not enter the overall top ten, but its total was only 123.4mm below the tenth-place figure. These extreme months often involve successive heavy downpours rather than a single event, leading to flooding risks in low-lying or hillside areas.
Hong Kong’s 10 Wettest Julys
July generally ranks among the rainier months thanks to occasional tropical systems. The wettest Julys since records began in 1884 include:
- 1994 — 1,147.2mm
- 2026 — 790.3mm
- 1917 — 763.8mm
- 1926 — 757.2mm
- 1997 — 746.0mm
- 1930 — 737.5mm
- 1886 — 717.7mm
- 1973 — 696.6mm
- 1995 — 668.7mm
- 1914 — 668.6mm
A total of 25 Rainstorm Warning Signals were issued by the Hong Kong Observatory during the entire month of July 2026, including 20 Amber (Yellow) Rainstorm Signals and 5 Red Rainstorm Signals. Despite record-breaking heavy rainfall and typhoon activity, no Black Rainstorm Signals were issued.
Forecast for This Week
The Observatory expects occasional showers and isolated thunderstorms on August 3, fewer showers on August 4 and sunny intervals from August 5. Very hot weather is forecast later in the week, with temperatures reaching around 33°C from Friday through Sunday.
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