Highest temperature in Tokyo on July 28?

Platform comparison

Market context

Tokyo's peak temperature on 28 July 2026 will be recorded at Haneda Airport Station and settled via Wunderground historical data. The market currently shows 0% implied probability across all temperature ranges, suggesting either early-stage liquidity constraints or data feed uncertainty ahead of the settlement window closing at 12:00 UTC on that date.

July temperatures at Tokyo Haneda typically range between 28–35°C, with extreme heat events pushing toward 37–38°C. Historical records show that late July represents peak summer conditions in the Kanto region, though the specific day-to-day variance depends heavily on typhoon activity and upper-level atmospheric patterns. The 2023 summer saw multiple days exceeding 35°C in Tokyo; comparable seasonal benchmarks suggest traders should calibrate expectations against both typical July distributions and any anomalous heat dome formation in the weeks prior.

Key variables include the Japan Meteorological Agency's forecasts (typically issued 10–14 days ahead) and real-time atmospheric pressure systems tracking across the Pacific. Tropical cyclone positioning in late July can either suppress temperatures through cloud cover or intensify heat through pre-storm atmospheric compression. Traders monitoring NOAA's Western Pacific typhoon track and JMA advisories will gain early signals on whether conditions favour the cooler or warmer resolution ranges. Settlement depends entirely on Wunderground's historical archive pull for Haneda on that specific date, with no discretionary adjustment mechanism.

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.

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.