Highest temperature in Beijing on July 25?

Platform comparison

Market context

Beijing's peak temperature on 25 July 2026 will be recorded at Capital International Airport Station and resolved against historical weather data from Wunderground. The settlement window closes at 12:00 UTC on that date, with USDC payouts distributed to traders holding positions in whichever temperature band contains the recorded high. The 0% crowd probability suggests either extreme confidence in a specific outcome or minimal trading activity, a common pattern for weather markets with narrow resolution windows and localised geographic specificity.

July represents peak summer in Beijing, with historical highs typically ranging between 32–37°C at the airport station. The 2023 heatwave pushed temperatures to 40°C in some districts, though airport readings tend to run slightly cooler due to elevation and measurement protocols. Comparable markets on extreme weather events show that crowd probabilities often compress toward single ranges only when recent precedent is fresh; the current flat distribution may reflect genuine uncertainty about whether 2026 will track recent warming trends or revert toward longer-term July averages.

Traders should monitor China Meteorological Administration forecasts released in early July 2026, which typically provide 10–14 day outlooks with reasonable accuracy for maximum temperatures. El Niño or La Niña conditions entering 2026 will influence broader East Asian weather patterns; current NOAA indices suggest monitoring through Q2 2026. Any unusual atmospheric blocking patterns or tropical cyclone activity in the Western Pacific could shift Beijing's temperature profile significantly, though such events are typically flagged in weather models 7–10 days in advance.

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 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.

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.