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Highest temperature in Chengdu on August 20?

Live odds for "Highest temperature in Chengdu on August 20?" pulled from the Polygon order book, alongside the platform attributes of every venue that runs this contract.

31°C 99% 32°C 2% 33°C 1% 24°C or below 0% Volume: $65K Liquidity: $365K Closes: 20 Aug 2026
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Highest temperature in Chengdu on August 20?

Platform comparison

PlatformYES oddsNO oddsFeeKYCSettlement
Polymarket (via Prediction Today) Pick
polygram.ink (preferred broker)
99% 1% 0% (USDC on-chain) No-KYC up to $1,500 USDC, auto via UMA oracle Live odds →
Polymarket (direct)
polymarket.com
99% 1% 0% Geo-blocked in US/UK/EU USDC, on-chain Live odds →
Kalshi
kalshi.com
Up to 7% per trade US-only, KYC required USD Live odds →
Betfair Exchange
betfair.com
2-5% commission Full KYC from first trade GBP / EUR Live odds →
Manifold Markets
manifold.markets
Play-money (mana) None — play-money Mana (no cash-out) Live odds →

Outcome probabilities

Current market-implied probability for each outcome, from the live order book.

OutcomeProbability
31°C99%
32°C2%
33°C1%
24°C or below0%
25°C0%
26°C0%
27°C0%
28°C0%
29°C0%
30°C0%
34°C or higher0%

Market context

Chengdu faces another sweltering day on 20 August 2026, with the market currently pricing zero probability of extreme heat. The city's summer climate typically peaks in July and early August, with temperatures moderating slightly by late August as monsoon patterns shift. Historical data from Chengdu Shuangliu International Airport shows August highs averaging 29–31°C, with extreme readings above 40°C exceptionally rare in the latter half of the month. The 0% crowd assessment reflects this seasonal baseline: late-August conditions rarely produce the sustained heat spikes that characterise mid-summer months.

Traders should monitor two key variables. First, any unusual atmospheric blocking patterns or heat dome formation across central China in early August could alter the trajectory heading into the 20th. Second, the resolution methodology matters considerably—the market explicitly uses Weather Underground's Daily Observations table rather than summary figures, which occasionally diverge. Chengdu's airport station is the designated measurement point, so localised urban heat effects or equipment calibration differences could affect recorded values. Recent meteorological forecasts for August 2026 are not yet available at this distance, making near-term weather model updates the primary catalyst for probability shifts.

The current zero reading suggests traders view a late-August extreme as implausible given climatological norms. Any probability movement would likely require forecasts indicating anomalous heat persistence well into the month or evidence of developing atmospheric conditions capable of sustaining temperatures substantially above the 31°C seasonal average.

Methodology

This page is a comparison snapshot: one live quote, four reference venues with their key attributes, and a single execution path — every trade button routes to Prediction Today, which mirrors the Polymarket order book directly.

Resolution & payout

At resolution the UMA oracle takes over: a proposer posts the outcome with a bond, any token holder can dispute within two hours. Without dispute the result is accepted and the smart contract distributes USDC instantly.

On Kalshi (CFTC-regulated) resolution runs through their in-house clearing engine in USD. Betfair Exchange settles after match end in the account's local currency. Manifold pays no cash — only its in-platform "mana" currency.

UK Frequently Asked Questions

Is this market available outside the US?
Polymarket itself is geo-blocked in the US/UK/EU. Always check the legal status of prediction markets in your jurisdiction before trading.
What's the difference between YES and NO shares?
A YES share pays $1.00 if the event happens, $0 otherwise. A NO share pays $1.00 if the event doesn't happen. The market price between 0¢ and 100¢ is the implied probability.
Is Polymarket legal in the UK?
Polymarket is accessible to UK traders but is not UKGC-licensed. It operates under US CFTC jurisdiction. UK residents face no domestic legal prohibition on using it, but UKGC consumer protections do not apply. For UKGC-regulated alternatives, Betfair Exchange and Smarkets offer similar prediction-style markets.
Do I pay tax on prediction market profits in the UK?
UKGC-licensed platform profits (Betfair, Smarkets) are typically tax-free gambling winnings for UK individuals. Polymarket profits involve USDC crypto transactions, which HMRC treats as Capital Gains Tax events. Keep full transaction records and report via Self Assessment if gains exceed £3,000 per tax year.
How do I deposit on Polymarket from the UK?
UK traders typically fund Polymarket via Coinbase UK, Kraken or Revolut — buying USDC with GBP and transferring to a Polygon-compatible wallet (MetaMask, Coinbase Wallet). Polymarket's onboarding walks you through the bridging process. Typical GBP-to-USDC conversion costs 0.5–1%.
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