Highest temperature in Chengdu on August 1?

Platform comparison

Market context

Chengdu’s airport temperature has to finish in the contract’s specified Celsius band for the market to pay out, and the real-world reference is the **highest** reading recorded at Chengdu Shuangliu International Airport on 1 August. August is usually Chengdu’s hottest month, with typical daily highs around 30°C–31°C and historical extremes well above 39°C, so the main risk is not whether it gets warm, but where the day’s peak lands within the settlement ranges.[4][6][16]

That helps explain why the current **0% YES** implies an extreme underpricing of the temperature buckets rather than a view that the day will be cool. Comparable August climate data show Chengdu often reaches the upper 20s to low 30s Celsius, with record highs in the high 30s and even above 40°C in some sources, so the relevant comparison is against a hot-weather distribution, not a mild one.[1][2][5][16] For a spot market settled in USDC, the on-chain mechanic is simple: the winning temperature range receives the payout, and every tick in the observed maximum matters only insofar as it crosses the range boundary.

The main catalysts are the local weather drivers between morning and the day’s peak, especially cloud cover, rainfall and thunderstorm timing, because a short-lived rain band can cap the maximum even in a hot season. Chengdu’s August climate is humid and rain-prone, with precipitation common across the month, so traders usually watch the afternoon evolution rather than the overnight minimum; the contract only resolves on the airport station’s highest reading for the day, not a citywide average.[2][10][16] In broader crypto terms, BTC and ETH volatility only matters here if it spills into market-making depth or funding conditions around the event, but the settlement itself is isolated to the weather print.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

Methodologically this overview focuses on on-chain pricing: Polymarket's live mid comes from the Polygon conditional-token order book and settles automatically in USDC. The other three venues — Kalshi, Betfair, Manifold — sit alongside as off-chain reference points so you can see how the contract translates across regulatory and settlement regimes.

Resolution & payout

Settlement is on-chain via UMA Optimistic Oracle. A proposer posts the outcome with a bond, a two-hour dispute window opens, then the smart contract lifts winning conditional tokens to 1 USDC and sends payments to holders' wallets automatically. No withdrawal fees beyond Polygon gas.

Off-chain venues (Kalshi, Betfair, Smarkets) settle in local fiat through bank-side clearing — faster than SWIFT, slower than on-chain. Manifold pays no real cash.

FAQ

What does a transaction cost on Polygon?

Polygon gas is typically under $0.01 per transaction. A full trade cycle (Approve + Order + Fill) totals around $0.03 — compared to $5-50 on Ethereum mainnet.

Can I use Bitcoin directly?

No, Polymarket operates exclusively in USDC on Polygon. You can bridge BTC to USDC via an exchange or bridge service and deposit on Polygon — typically 10-30 minutes processing time.

How does UMA secure the resolution?

The UMA Optimistic Oracle uses a bond system: a proposer posts a bond, a two-hour challenge window opens. On dispute the losing side forfeits the bond — financial incentive for honest resolution.

How volatile are crypto prediction markets?

Crypto markets react to spot prices — a 5% BTC move typically shifts a "BTC above X by date" market 10-20%. Polymarket crypto market liquidity is usually six-figure USD, sufficient for active trading.

Which crypto markets exist on Polymarket?

Currently active markets include BTC/ETH/SOL price targets, halving dates, ETF approvals, hard-fork outcomes and Layer-2 TVL thresholds. The list updates weekly; biggest volume sits on BTC and ETH price forecasts.