Highest temperature in Tokyo on May 26?

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Market context

Tokyo's highest temperature on 26 May 2026 will be recorded at Haneda Airport Station and settled against historical weather data from Wunderground. The settlement window closes at 12:00 UTC on that date, after which the maximum temperature reading becomes final. Current crowd pricing at 0% YES suggests either extreme confidence in a specific temperature range or minimal trading activity; either way, this reflects the inherent difficulty in forecasting a single day's peak temperature nearly eighteen months in advance.

Tokyo's May climate sits at the cusp of late spring and early summer, with historical highs typically ranging between 25–28°C at Haneda. The 0% probability across all ranges warrants scrutiny: either the market has collapsed into a single heavily-backed outcome, or liquidity remains too thin to establish meaningful odds. Comparable May days at Haneda show considerable variance—wet fronts and Pacific high-pressure systems both influence daily maxima significantly. Traders should cross-reference Japan Meteorological Agency seasonal forecasts and long-range models (GFS, ECMWF) released in April 2026 to establish baseline expectations.

Key catalysts include the release of May 2026 weather patterns by the JMA in late April, which typically refines confidence in temperature bands. USDC settlement mechanics on btc-prediction.bet mean traders face no slippage from spot conversions; however, funding rates on related weather derivatives (if available) may signal institutional positioning. Watch for any anomalous whale flows into specific temperature brackets in the final fortnight before resolution—such concentration often precedes volatile repricing as new information arrives.

Methodology

This page reads Highest temperature in Tokyo on May 26? on-chain. Polymarket's quote comes directly from the Polygon order book — the only comparable venue with on-chain settlement. Kalshi (USD, off-chain), Betfair (GBP/EUR, off-chain) and Manifold (play-money) are listed for comparison. Every CTA routes to BTC Prediction, which mirrors the Polymarket order book directly.

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

Is this market available outside the US?

BTC Prediction is available in most jurisdictions where Polymarket isn't directly accessible. Polymarket itself is geo-blocked in the US/UK/EU. Always check local regulations.

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's the difference between YES and NO shares?

A YES share pays $1.00 if the event happens, $0 otherwise. A NO share pays $1.00 if the event doesn't happen. The market price between 0¢ and 100¢ is the implied probability.

Do I need to KYC for this market?

Not under $1,500 of lifetime trading volume. Above that threshold, BTC Prediction triggers a quick verification flow that finishes in 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.