Residents who recall the biting chill of Hong Kong winters decades ago are not experiencing nostalgia; they are witnessing a dramatic climatic shift. The Hong Kong Observatory (HKO) recently confirmed that the city has just endured its warmest winter season since official record-keeping began 142 years ago. From December through February, the city saw unprecedented mercury levels, officially marking a new milestone in a long-term warming trend that is reshaping the territory’s seasonal identity.
Breaking Historical Records
According to the HKO’s latest weather summary, the mean temperature for the past three months reached 19.3 degrees Celsius, a significant two-degree jump above the established norm. The season was characterized by persistent mildness, with the average maximum temperature hitting a record 21.9 degrees Celsius. Even the nights offered little reprieve for those seeking traditional winter weather; the average minimum temperature was recorded at 17.3 degrees Celsius, the second-highest ever documented.
The lack of sustained cold was perhaps the most visible indicator of this shift. While a typical Hong Kong winter features several stretches of temperatures dipping below 12 degrees Celsius—the HKO’s official threshold for a “cold day”—this season saw only five such days. This count ranks as the third-lowest on record, underscoring a season that felt more like an extended autumn than a traditional winter.
An Unseasonably Mild February
February 2026 served as the primary catalyst for these record-shattering statistics. Described by meteorologists as “unseasonably warm,” the month saw a mean temperature of 20.1 degrees Celsius. This figure stands three degrees above the historical average, contrasting sharply with February 2025, which remained close to the norm at 17.1 degrees Celsius.
In addition to the heat, the final month of winter brought unexpected humidity and precipitation. A trough of low pressure during the month’s close resulted in 41.6 millimeters of rainfall, surpassing typical levels by seven percent.
The Broader Climate Context
The Observatory attributes these rising temperatures to the overarching influence of global warming. Data from the past 30 years indicates a consistent upward trajectory for Hong Kong’s mean temperatures. The recent record follows a series of increasingly warm years:
- 2024: 11 out of 12 months were warmer than average, with only 11 total cold days recorded.
- 2025: Every single month of the year exceeded temperature norms, and for the first time since 1999, no Cold Weather Warnings were issued during November or December.
Implications for the Future
The HKO warns that the trend toward fewer cold surges and more frequent record-breaking heat is likely to persist. For locals and travelers alike, this shift means a lighter wardrobe and a greater reliance on cooling systems even during the traditional “off-season.”
As Hong Kong grapples with this new meteorological reality, the HKO continues to monitor the long-term impacts of urban heat islands and global climate patterns on the city’s unique subtropical environment. For more information on staying safe during extreme weather shifts, residents are encouraged to monitor the HKO’s digital channels for real-time updates and seasonal forecasts.
