September 2026 Hong Kong Weather: Fifth-Highest Minimum Temperature on Record
SingTao · 4 SOURCES1 day ago2 MIN
Summary
Hong Kong experienced an exceptionally hot and dry September 2026, with the average minimum temperature of 27.1°C marking the fifth-highest for any September on record . The Hong Kong Observatory reported nine days of very hot weather warnings, while total rainfall of 94.3mm represented only 29% of the monthly normal . Despite the dry month, cumulative rainfall for the first nine months of 2026 reached 2,451.9mm, approximately 9% above the same period normal .
Key Points
- Average minimum temperature of 27.1°C was 1.0°C above normal, the fifth-highest September reading since records began
- Nine days of very hot weather warnings were issued; peak temperature of 34.2°C recorded on September 30
- Total September rainfall was only 94.3mm, approximately 29% of the normal 321.4mm
- Tropical cyclone Saudel triggered Standby Signal No. 1, passing approximately 200km southeast of Hong Kong on September 1
- Average relative humidity of 74% was four percentage points below normal, ranking among the sixth lowest for September
Why It Matters
The combination of sustained high temperatures and below-normal rainfall elevates fire risks and puts strain on public health systems, particularly for vulnerable populations . Although September was dry, cumulative rainfall for the first nine months remains above normal at 2,451.9mm, indicating the year's water resources have not been severely impacted so far .
The combination of sustained high temperatures and below-normal rainfall elevates fire risks and puts strain on public health systems, particularly for vulnerable populations . Although September was dry, cumulative rainfall for the first nine months remains above normal at 2,451.9mm, indicating the year's water resources have not been severely impacted so far .