The Observatory forecasts that Hong Kong's weather will remain persistently hot and dry. Tomorrow's (Oct. 21) maximum temperature will reach 33°C, which is expected to break the record for the latest occurrence of very hot weather in the year (the current record is Oct. 19, 2024), with continued dry and very hot conditions during the day. At the same time, the outer subsiding air of Tropical Cyclone Champi will bring clear, very hot, and extremely dry weather in the latter part of this week, with relative humidity on Friday (Oct. 23) dropping significantly to as low as 35%.
The Observatory expects that tomorrow (Oct. 21) will be generally fine, dry, and extremely hot during the day, with lower visibility in some areas initially. Temperatures will range from 26°C to 33°C, with relative humidity between 55% and 90%, and isolated showers in some areas. Subsequently, a dry northeast monsoon will gradually affect the coastal areas of southern China later tomorrow.
By Thursday (Oct. 22), Hong Kong will experience northerly to northeasterly winds of force 3 to 4. There will be some cloudy periods with one or two showers initially, becoming generally fine, dry, and hot during the day. Temperatures will range from 25°C to 32°C, with relative humidity between 50% and 85%.
The Observatory forecasts that Tropical Cyclone Champi will cross the waters east of Luzon over the next one to two days, and is then more likely to turn northward over the waters east of Taiwan and cross the East China Sea. Affected by Champi's outer subsiding air, Hong Kong will experience very hot and extremely dry weather starting from Friday (Oct. 23).
Friday (Oct. 23) will be fine, very hot, and extremely dry during the day, with a maximum temperature of 33°C and relative humidity between 35% and 70%. Saturday (Oct. 24) will be generally fine and dry, hot during the day, with temperatures ranging from 25°C to 32°C and relative humidity between 40% and 75%.
Looking ahead to early next week, another northeast monsoon will affect Guangdong. Sunday (Oct. 25) will be generally fine and dry during the day, with northerly to northeasterly winds of force 3 to 4. Temperatures will range from 26°C to 31°C, with relative humidity between 55% and 85%.
As for next Monday (Oct. 26) and next Tuesday (Oct. 27), temperatures will relatively drop to between 26°C and 30°C. Monday will see some sunny periods with isolated showers in some areas; Tuesday will have some sunny periods with northeasterly winds of force 4.
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