Highest temperature in Tokyo on June 8?

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Market context

Tokyo's weather on 8 June 2026 will be measured against historical June patterns at Haneda Airport, where early summer typically brings temperatures in the mid-to-high 20s Celsius. The settlement relies on Wunderground's historical weather database for the single highest temperature recorded across all times on that date. Current market pricing at 0% suggests traders are either uncertain about which temperature range will occur or are awaiting clearer seasonal forecasts as the date approaches.

June in Tokyo sits at the transition between late spring warmth and the onset of the rainy season (tsuyu), which typically begins mid-month. Historical data from Haneda shows June highs averaging around 25–27°C, though anomalously warm days can push into the low 30s. The 2023 June average was notably cooler than the 2022 season, illustrating year-to-year variability that affects how traders should weight recent versus longer-term climate normals.

Traders monitoring this market should track Japan Meteorological Agency forecasts released in the week preceding 8 June, as these provide the most reliable 7-day outlooks for the Tokyo region. Any significant weather systems—early tsuyu onset or high-pressure systems lingering from late May—would materially shift expected temperature ranges. The settlement window closes at midday UTC on 8 June, meaning real-time temperature data from Haneda becomes available only after markets close, requiring traders to rely on forecast models rather than observed conditions.

Methodology

This page reviews Highest temperature in Tokyo on June 8? across five venues. We show live odds for Polymarket-based markets (sourced from the Polygon order book); for other venues we list platform attributes, since the comparable contracts are not exposed via a public API on every venue. Every CTA points at Prediction Today — the application we operate, where you trade directly against the Polymarket order book at 0% fees.

Resolution & payout

Settlement runs on-chain. Polymarket's contract logic separates YES and NO shares as conditional tokens; at resolution the winning share lifts to $1.00 and the losing one to $0. The outcome input comes from the UMA Optimistic Oracle, which secures against bad resolution with a bond + dispute window.

Once finalised, the smart contract pays USDC to the holders' wallets within minutes — no withdrawal fees beyond Polygon network gas. Kalshi settles in USD via CFTC clearance, Betfair in account currency net of commission, Manifold in play-money mana with no cash-out.

FAQ

Where can I trade this market with the lowest fees?

On Prediction Today, which mirrors the Polymarket order book at 0% fees. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

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.

What does it cost to trade on Prediction Today?

Zero. Prediction Today routes every order to the live Polymarket order book; the only cost is the Polygon network fee, typically under $0.01 per transaction.

How fast are USDC deposits?

Polygon credits deposits after 12 confirmations — usually under 30 seconds. Withdrawals follow the same path and land back in your wallet within minutes.

Do I need to KYC for this market?

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