Northeast Monsoon Brings Sharp Temperature Drop to Hong Kong
HK01 · 3 SOURCESabout 3 hours ago5 MIN
Summary
The Hong Kong Observatory confirmed on Sunday that a northeast monsoon supplement is expected to arrive along the coast tonight, marking the transition into autumn weather patterns. The arrival of this monsoon system will trigger a sharp temperature drop across the territory, with urban areas seeing lows of 23 degrees Celsius on Tuesday and Wednesday mornings—representing an 8-degree plunge from Monday's forecast high of 31 degrees. Conditions will shift from showery to sunny and dry as the week progresses, with relative humidity plummeting to approximately 45 percent on Wednesday, the lowest point in the nine-day forecast period.
Key Points
- The northeast monsoon supplement will arrive Sunday night, bringing northerly winds of force 4 to 5, occasionally reaching force 6 on highlands
- Monday's high of 31 degrees Celsius will drop to 23 degrees Tuesday morning—a decline of 8 degrees within 24 hours
- Rural areas will experience even colder conditions: Ta Kwu Ling will fall to 19-21 degrees, Tseung Kwan O and Lau Fau Shan to 22 degrees
- Mid-week humidity will drop significantly, with Wednesday's lowest humidity reaching just 45 percent, and minimum humidity hovering around 50 percent
- Thursday marks the solar term "Cold Dew" (寒露), with temperatures rebounding to 25-30 degrees under sunny, dry skies
Why It Matters
This temperature swing and shift to dry conditions will affect daily routines and health considerations for Hong Kong residents, particularly elderly citizens who may need to adjust clothing and monitor indoor humidity levels. The clear weather following the cold front will benefit outdoor activities and air quality but may increase fire risk in rural areas due to the persistently low humidity through the weekend .
This temperature swing and shift to dry conditions will affect daily routines and health considerations for Hong Kong residents, particularly elderly citizens who may need to adjust clothing and monitor indoor humidity levels. The clear weather following the cold front will benefit outdoor activities and air quality but may increase fire risk in rural areas due to the persistently low humidity through the weekend .