Cold Front Brings Rain and Thunderstorms to Hong Kong
AM730 · 4 SOURCESabout 3 hours ago2 MIN
Summary
The Hong Kong Observatory issued a Yellow Rainstorm Warning at 8:20 PM on Sunday, October 4, 2026, after a cold front formed over inland Guangdong and began moving southward . The warning was cancelled at 10:30 PM the same evening . The frontal system brought showers and thunderstorms that affected the Pearl River Estuary area, with some regions experiencing heavy rainfall . Temperature drops are expected across the territory, with urban areas seeing minimum temperatures around 23 degrees Celsius by Tuesday and Wednesday . Northerly winds will strengthen, transitioning from light breezes to moderate or fresh conditions .
Key Points
- The Observatory issued the Yellow Rainstorm Warning at 8:20 PM on Sunday, indicating hourly rainfall exceeding 30 mm, and cancelled it at 10:30 PM
- A thunderstorm warning remained in effect as the cold front triggered heavy showers over the Pearl River Estuary
- Tuesday and Wednesday mornings will see urban temperatures drop to 23°C, with New Territories areas 2-3 degrees cooler
- Shek Kwu Leng is forecast to reach 21°C and Tseung Kwan O 22°C on Tuesday morning
- Wind direction will shift from light southerly to moderate or fresh northerly by Monday night, with strong gusts expected on highlands
Why It Matters
The arrival of this cold front signals a significant seasonal transition for Hong Kong, bringing an end to the prolonged warm spell with temperatures dropping by up to 8 degrees Celsius overnight . Residents in low-lying areas face potential flooding risks from the heavy rainfall, while the forecast dry weather from mid-week onward will bring larger temperature variations between day and night, particularly affecting inland communities .
The arrival of this cold front signals a significant seasonal transition for Hong Kong, bringing an end to the prolonged warm spell with temperatures dropping by up to 8 degrees Celsius overnight . Residents in low-lying areas face potential flooding risks from the heavy rainfall, while the forecast dry weather from mid-week onward will bring larger temperature variations between day and night, particularly affecting inland communities .