Highest temperature in Shenzhen on August 21?

Platform comparison

Market context

Shenzhen will experience peak heat on 21 August 2026, with the market tracking whether the daily maximum temperature at Bao'an International Airport Station will fall within specified ranges. The resolution hinges on Weather Underground's Daily Observations table rather than summary figures, a distinction that matters when automated systems and manual readings diverge. Settlement occurs at midday UTC on the resolution date, allowing for final temperature recordings before closure.

August represents Shenzhen's hottest month, with historical daily maxima typically ranging between 32–34°C. Data from the past decade shows that temperatures exceeding 35°C occur in roughly 15–20% of August days at the airport station, whilst readings above 36°C remain relatively uncommon. The 0% crowd probability suggests traders are pricing in either a cooler-than-typical August day or scepticism about extreme heat materialising. Comparable August 21st records from 2015–2024 provide the most direct precedent; most years saw highs between 31–34°C, with only two instances breaching 35°C.

Traders should monitor tropical weather systems and typhoon activity in the South China Sea during mid-August 2026, as these systems can suppress temperatures through cloud cover and rainfall. The China Meteorological Administration typically issues seasonal forecasts in late July; their August outlook will signal whether conditions favour above-average or below-average heat. Any significant monsoon activity or upper-atmosphere patterns favouring cooler air masses would reinforce the current low probability, whilst persistent high-pressure systems would increase the likelihood of extreme temperatures.

Methodology

This page tracks Highest temperature in Shenzhen on August 21? across four political prediction venues. Live odds come from the Polymarket order book (the deepest political prediction-market book). Kalshi is the CFTC-regulated US alternative, Betfair the established UK sports-exchange with politics markets, Manifold the open play-money variant. For users geo-blocked from Polymarket directly, brokers like Trump Prediction provide a 0%-fee route into the same order book.

Resolution & payout

For political markets the resolution source is decisive. Polymarket defines a concrete source per contract (e.g. AP, Reuters, official electoral commission) and uses the UMA Optimistic Oracle as the on-chain dispute mechanism. With a clearly defined outcome the USDC payout lands within minutes of the final confirmation.

UK Frequently Asked Questions

What resolution source is used for elections?

Polymarket defines the source per contract — usually Associated Press (AP Race Call), Reuters or the official electoral commission. The source is stated in contract details before the market opens.

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Markets reflect expectations rather than create them. Studies show public-facing markets can anchor expectations, but don't influence the underlying outcome. Political markets are information, not advocacy.

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High-liquidity markets move within seconds to minutes. A Trump tweet on the economy can shift the "Trump 2024" market 2-5 points before mainstream media has written anything.

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Are UK election prediction markets available from the UK?

Yes. Betfair Exchange and Smarkets offer UKGC-regulated UK election markets (seat counts, party share, constituency results). Polymarket also lists UK election contracts with deeper global liquidity. Betfair winnings are typically tax-free for UK individuals; Polymarket profits are subject to HMRC CGT.