# Hong Kong extreme heat and rising temperatures

> Developing situation record from CLSTR: https://clstr.news/situations/hong-kong-extreme-heat-and-rising-temperatures
> Updated: 2026-10-21T02:25:30.000Z. Sources: 6. Developments: 2.

Hong Kong is experiencing a significant increase in extreme weather patterns, specifically regarding rising temperatures and heatwaves. Data from the Hong Kong Observatory shows that “very hot days” (33°C or above) have increased from an average of 13.4 days per year in the 2000s to more than 50 annually in the 2020s. Additionally, “extremely hot days” (35°C or above) now average 4.6 days per year, a sharp rise from previous decades.

In October 2026, the Observatory issued a hot weather warning as temperatures were forecast to reach 33°C or higher, with some areas potentially hitting 37°C. This event was expected to set a record for the latest hot weather warning of the year. Experts attributed these extreme conditions to a combination of sinking air and high-pressure systems from super typhoon “Melor,” a super El Niño event that has weakened the cooling northeast monsoon, and a rising global temperature baseline caused by climate change.

## Timeline

### 2026-10-21: Hong Kong issues heat warning as temperatures hit record highs

Hong Kong faces record-breaking late-season heat, with temperatures reaching 33°C to 37°C due to a super El Niño and typhoon-related sinking air.

4 sources. https://clstr.news/cluster/hong-kong-issues-heat-warning-as-temperatures-hit-record-highs

### 2026-09-26: Hong Kong faces rising temperatures and frequent heatwaves

Hong Kong is facing rising temperatures and more frequent heatwaves, with “very hot days” increasing from an average of 13.4 in the 2000s to over 50 annually in the 2020s.

2 sources. https://clstr.news/cluster/hong-kong-faces-rising-temperatures-and-frequent-heatwaves

---
Cite as: Hong Kong extreme heat and rising temperatures. CLSTR, https://clstr.news/situations/hong-kong-extreme-heat-and-rising-temperatures