Highest temperature in Chengdu on August 3?

Platform comparison

Market context

Chengdu’s daytime heat on 3 August is usually firmly in summer territory, with historical August averages putting the city around the high-20s to low-30s Celsius and early-August highs often near 29–34°C[2][10]. For this market, the settlement variable is the *single highest* temperature recorded at Chengdu Shuangliu International Airport on the day, so the relevant question is not the afternoon average but whether a short-lived spike reaches the top of one of the contract’s bands[15]. Against that backdrop, a 0% crowd price implies the market is pricing in no credible path to a qualifying reading, which is unusual for a mid-summer Chengdu session unless expectations are for persistent cloud, rain, or a cooler synoptic pattern.

Comparable August climate data show Chengdu can still produce sharp heat extremes: one source puts the city’s all-time August record at 41.6°C, while another notes a 39°C peak in a recent heatwave year[9][4]. That means the tail risk is real even in a humid, rainy month, and the distinction between city-wide records and airport-station readings matters because local site conditions can run a degree or two cooler or warmer than the broader urban average[15][6]. In practice, a 0% implied probability is best read as a statement about expected *extreme* heat, not about whether the day will feel warm in ordinary summer terms.

The main catalysts are the short-range weather evolution and any late-shifting monsoon or convective setup over Sichuan, which can cap highs quickly if cloud cover and rain persist[1][6]. Traders should watch the Wunderground station page for the actual airport maximum as it updates through the day, because the market resolves to that source rather than to model forecasts or general city forecasts[15]. If broader crypto conditions matter to positioning, BTC and ETH volatility can still influence on-chain risk appetite and USDC deployment, but they do not affect the weather outcome itself; they only affect how aggressively liquidity is priced into the contract.

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

Why USDC and not ETH or USDT?

USDC is the Polygon standard — audited reserves (Circle, monthly attestation), deepest order book, low gas costs. ETH volatility would distort probability quotes; USDT has thinner Polygon liquidity than USDC.

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.

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.

Are crypto prediction markets taxable in the US?

In the US, prediction market gains are typically treated as ordinary income or short-term capital gains depending on holding period. Consult a tax professional for your specific situation — we cannot provide tax advice.