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Highest temperature in Chengdu on August 9?

How the prediction-market book is pricing "Highest temperature in Chengdu on August 9?" right now, with a side-by-side platform comparison and zero-fee CTAs.

34°C 100% 27°C or below 0% 28°C 0% 29°C 0% Volume: $70K Liquidity: $311K Closes: 9 Aug 2026
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Highest temperature in Chengdu on August 9?

Platform comparison

PlatformYES oddsNO oddsFeeKYCSettlement
Polymarket (via Prediction Today) Pick
polygram.ink (preferred broker)
100% 0% 0% (USDC on-chain) No-KYC up to $1,500 USDC, auto via UMA oracle Live odds →
Polymarket (direct)
polymarket.com
100% 0% 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
34°C100%
27°C or below0%
28°C0%
29°C0%
30°C0%
31°C0%
32°C0%
33°C0%
35°C0%
36°C0%
37°C or higher0%

Market context

Chengdu has opened the day warmer than late-summer averages, with the airport station at 79°F/26°C by 9:00 AM UTC and a morning high already matching the lower end of the forecast range. The market is still anchored to the **Daily Observations** table at Chengdu Shuangliu International Airport, not the summary “Day High & Low” panel, so the live path of the reading matters more than any headline display.[3][11]

For context, August is Chengdu’s hottest month on average, with typical highs around 30–31°C and occasional spikes into the mid-30s°C; historical August records show the city can reach roughly 39°C in exceptional heat events.[1][8][15] That framing helps explain why a **0% YES** price is unusual: it implies the crowd sees the currently most likely bucket as already out of reach, even though early-day temperatures can still move materially if afternoon heating develops as expected in the city’s humid summer climate.[12][15]

The key catalysts are the rest of today’s temperature observations at the airport station, especially any jump before the local afternoon peak, plus whether cloud cover, rain, or a cool sea-breeze-like change limits the climb. Weather Underground’s history page is the resolution source and was last updated at 9:00 AM UTC in the live feed, so traders will be watching successive table entries rather than general city forecasts for the final resolved high.[3][11][20]

Sources: 1 · 2 · 3 · 4 · 5

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

Polymarket-based markets settle through the UMA Optimistic Oracle on Polygon. A proposer submits the outcome, a two-hour challenge window opens, and unchallenged proposals finalise the resolution. Payouts settle automatically in USDC the moment the result is final — no bookmaker, no delay.

Kalshi-based markets settle in USD via the CFTC-regulated clearinghouse. Betfair Exchange settles in GBP/EUR net of commission. Manifold is play-money and does not pay out real funds.

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.
How does resolution work?
Through the UMA Optimistic Oracle on Polygon: a proposer submits the outcome, a two-hour challenge window opens, and USDC payouts settle automatically once the result is final.
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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