Will Hong Kong Reach 27°C or Below on August 15 2026?

What is happening now

The Polymarket event “Highest temperature in Hong Kong on August 15?” is awaiting the official daily maximum temperature recorded by the Hong Kong Observatory for 15 August 2026. As of the latest data, the temperature reading has not yet been published, so the market remains in a pending‑resolution state. Traders currently assign near‑certain probability (≈100%) that the temperature will exceed 27 °C, making “No” the leading outcome.

How the market is structured

This is a price‑ladder market composed of several binary contracts, each tied to a specific temperature threshold (27 °C or below, 28 °C, 29 °C, etc.). The primary contract (ID 3558115) asks whether the highest temperature will be 27 °C or below. It offers a “Yes” outcome (≤27 °C) at a price of 0.0005 (0.1 % probability) and a “No” outcome (>27 °C) at 0.9995 (100 % probability). The market cannot resolve until the Observatory releases the “Absolute Daily Max” value, which is reported to one decimal place (e.g., 27.3 °C).^[1]

Path to the leading outcome

For the leading “No” outcome to be realized, the observed maximum temperature must be greater than 27 °C—specifically, at least 27.1 °C. If the Observatory records a temperature meeting or exceeding that threshold on 15 August 2026, the “No” contract will settle at 1.0, paying out the holder of the “No” share. Conversely, a reading of 27.0 °C or lower would trigger the “Yes” settlement, flipping the market outcome.

What could change the pricing

A shift in pricing would occur if the official temperature is reported at or below 27 °C, causing the “Yes” price to rise sharply and the “No” price to fall. Such a change would be immediate once the Observatory publishes the final daily maximum. Delays in publishing the data could create temporary liquidity pressure, but the market will remain open until the official figure is confirmed. Any subsequent revision or dispute over the recorded temperature would also need to be verified before the final resolution.

Editorial read

The market is heavily skewed toward temperatures above 27 °C, reflecting strong trader confidence that Hong Kong will experience a notably hot day on 15 August 2026. With over $270,000 in total volume and robust liquidity, participation is active and the consensus view is clear. The pending‑resolution status means the contract will stay open until the Hong Kong Observatory releases the official daily maximum temperature, at which point the outcome will be settled automatically based on the recorded value. Until that data appears, the “No” outcome remains the dominant expectation, but a cooler-than-expected reading could dramatically alter the odds.

Polymarket event page Hong Kong Observatory climatology source