Highest temperature in Chengdu on August 6?

Platform comparison

Market context

Chengdu’s highest temperature is set by the day’s peak reading at Chengdu Shuangliu International Airport Station, so the practical trade is a forecast of the city’s afternoon heat rather than the overnight low or a broad monthly average. August in Chengdu is typically hot, humid and rain-affected, with long-run guides clustering daytime highs around 30–32°C and describing the month as the city’s hottest period; even so, the airport station’s actual daily maximum can land a few degrees above or below that baseline depending on cloud cover, showers and whether the heat breaks before or after peak heating.[1][6][11][13][18]

For a power-user, the cleanest way to approach this market is to model the resolution source directly: ingest the Wunderground station page, watch the intraday maximum rather than end-of-day summaries, and compare it with nearby forecast products that often show a wider range than the resolved station reading.[1] Comparable cases in Chengdu usually resolve close to the low-to-mid 30s in late summer when skies partly clear, but rainfall can cap the high sharply; Wunderground-style station markets are therefore often driven more by mesoscale timing than by the headline city forecast.[3][4][9] The current crowd-implied 0% YES looks hard to reconcile with the climatology, because recent official city forecasts have still put Chengdu near 35°C on 6 August, while August normals suggest a materially warmer outcome than zero.[1][9]

What matters next is the morning-to-afternoon setup: whether showers persist into the heating window, how much sun breaks through after dawn, and whether any city-level advisories or forecast revisions shift the expected ceiling before the settlement window closes.[1][9] Traders who automate around this market would normally poll the station history page repeatedly, compare it with forecast updates from official or near-official weather services, and trigger orders only when the forecast maximum moves across a settlement band boundary.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

We track Highest temperature in Chengdu on August 6? across the five venues with material prediction-market liquidity. The probability shown is the live Polymarket mid; the comparison rows summarise how each venue treats the underlying contract — fees, KYC thresholds, settlement currency, deposit options. The highlighted row marks the cheapest route into Polymarket's order book.

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.

FAQ

Where can I trade this market with the lowest fees?

Polymarket is geo-blocked in the US/UK/EU. The easiest 0%-fee broker into the same order book is Kalshi Fees. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

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.

What does Polymarket cost to trade?

Polymarket itself charges 0% — the only cost is the Polygon network fee, typically under $0.01 per transaction. Off-chain venues like Kalshi or Betfair charge 2-7% commission.

How fast are USDC deposits?

Polygon credits deposits after 12 confirmations — usually under 30 seconds. Withdrawals follow the same path and land back in your wallet within minutes.

How reliable are the quoted odds?

The YES/NO percentages are the live mid-prices of the Polymarket order book. On deep markets they move every few seconds; on thinner ones you'll see short plateaus.