Highest temperature in Tokyo on July 7?

Platform comparison

Market context

The real-world event hinges on the highest temperature recorded at Tokyo Haneda Airport on 7 July 2026, measured in degrees Celsius and sourced from Wunderground. Current crowd-implied probability sits at 0% for the YES outcome, suggesting the market expects the temperature to fall outside the specific bin being traded. Historical patterns for mid-July in Tokyo show daily highs typically ranging between 27°C and 31°C, with frequent rain and high humidity dampening extreme spikes. For instance, the BBC Weather forecast for 7 July indicates drizzle and a high of 27°C, while the Met Office projects a maximum of 30°C for the week, framing the 0% probability as a reaction to likely cooler, wetter conditions rather than a record-breaking heatwave[3][1].

Traders should monitor the Japan Meteorological Agency’s daily weather bulletins and real-time radar feeds for sudden shifts in cloud cover or precipitation, which directly influence temperature ceilings. A recent Reuters report noted Japan’s record high of 41.2°C in late July 2025, but such extremes are rare and usually tied to specific western prefectures, not the humid, coastal Haneda zone[8]. On-chain, watch for USDC settlement flows and BTC/ETH funding rate divergences that may signal whale positioning ahead of the 2026-07-07 settlement window; elevated funding rates could indicate aggressive speculation on temperature outliers, even if current odds remain low. Exchange spot data from CoinGecko or similar sources will help confirm whether macro crypto volatility is driving contrarian bets on this weather contract[4].

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page reads Highest temperature in Tokyo on July 7? 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 alongside for venue context. 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

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.

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.