Highest temperature in Hong Kong on August 15?

Platform comparison

Market context

Hong Kong’s daytime high on 15 August is the key variable, with the market currently pricing a 0% YES outcome and the settlement cut-off at 12:00 UTC meaning only the morning-to-midday evolution matters. That leaves the favourite on the lower temperature bands, while the market is effectively treating a higher-end reading as a long-shot underdog.

Historically, mid-August in Hong Kong usually sits in the low-30s Celsius, with recent seasonal guidance pointing to August to October temperatures that are normal to above-normal. The Observatory’s own August coverage last year showed a mean daily maximum of 31.9C, and August averages on travel and climate summaries typically cluster around 30C to 31C, so the consensus anchor is a low-30s result rather than an extreme. Against that backdrop, a 0% implied probability on the top bands leaves any value more likely in a contrarian play on heat building after a settled morning, rather than a broad case for a record-like spike.

The main catalyst is the Hong Kong Observatory’s intraday forecast and the day’s rain-and-thunderstorm setup, which can cap the maximum if cloud and showers persist. Early bulletin updates on 15 August showed 28C at 2 a.m., an Amber Rainstorm Warning, thunderstorm warnings, and squally conditions, while the public forecast issued on 13 August called for 27C to 31C with showers and thunderstorms, then a hotter spell with sunny intervals later. That creates a clear handicapper’s split: the underdog is the upper tail if rain clears quickly and sunshine breaks through, while the favourite remains the mid-range temperature bands unless convection lingers.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

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Resolution & payout

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UK Frequently Asked Questions

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