Highest temperature in Hong Kong on August 20?

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Market context

The Hong Kong Observatory will record the highest temperature in Hong Kong on 20 August 2026, measured in degrees Celsius to one decimal place. This reading will be taken from the Observatory's official daily meteorological data and published in their Daily Extract records once the date has passed and measurements are finalised.

August temperatures in Hong Kong are consistently elevated, with historical records showing daily maxima typically ranging between 31°C and 34°C during this period. The Observatory's 30-year climate normals indicate an average daily maximum of approximately 32.3°C for mid-August. Extreme heat events pushing above 35°C occur occasionally but remain statistically uncommon; the territory's record August daily maximum stands at 36.3°C, set in 1990. Recent years have shown variability, with some August days reaching 33–34°C whilst others remain closer to the 31–32°C range depending on monsoon patterns and tropical cyclone activity.

Traders should monitor tropical cyclone forecasts in late July and early August 2026, as these systems significantly influence Hong Kong's weather patterns and can either suppress temperatures through cloud cover and rainfall or elevate them through pre-storm heat buildup. The Observatory's extended forecasts, typically issued 7–10 days in advance, will provide the most reliable guidance on atmospheric conditions likely to prevail on 20 August. Sea surface temperatures in the South China Sea and the strength of the Pacific high-pressure system will also shape whether the day trends toward the cooler or warmer end of the typical August range.

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