Highest temperature in Tokyo on August 18?

Platform comparison

Market context

Tokyo's highest temperature on 18 August 2026 will be measured at Haneda Airport Station using Weather Underground's Daily Observations table, the primary resolution source for any discrepancies with summary data. The market currently shows 0% probability across all temperature ranges, suggesting traders are either awaiting baseline forecasts or treating August conditions as highly uncertain at this distance.

Mid-August temperatures at Tokyo Haneda typically range between 28°C and 35°C, with historical August highs frequently exceeding 33°C during typical summer patterns. The 2023 summer saw sustained temperatures above 35°C across multiple days in mid-August, whilst 2022 recorded a peak of 37.1°C on 16 August. These precedents indicate that higher temperature brackets (32–37°C+) have resolved regularly in recent years, though the specific date of 18 August has shown variability depending on weather system positioning and timing of any typhoon activity or atmospheric blocking patterns.

Traders should monitor Japan Meteorological Agency forecasts released in late July and early August, which will provide the first reliable seasonal outlook for that specific week. Typhoon activity in the Western Pacific during early-to-mid August could materially shift conditions; tropical systems approaching Japan typically suppress daytime highs through cloud cover and precipitation, whilst their absence allows sustained heat. Historical Haneda data from previous years' 18 August dates will become increasingly relevant as the settlement window approaches, offering direct comparables for typical conditions on that calendar date.

Methodology

Sports-specific comparison page for Highest temperature in Tokyo on August 18?. Polymarket's live quote (Polygon order book) plus platform attributes for the three reference venues. Sports markets reward liquidity — Polymarket and Betfair are materially deeper than Kalshi or Manifold.

Resolution & payout

Sports markets typically settle on official final-whistle plus league confirmation. Polymarket uses UMA Optimistic Oracle with a source URL per contract — usually official league data feeds or ESPN/Soccerway. Two-hour dispute window, then smart-contract payout in USDC.

UK Frequently Asked Questions

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Prediction markets tend toward tighter odds than bookmakers because they use peer-to-peer exchange rather than bookmaker margin. On major matches, Polymarket quotes typically sit 2-5% closer to the true probability model than bet365 or DraftKings.

When do sports markets resolve?

Typically within hours of the official final whistle. Polymarket uses UMA Optimistic Oracle with source URLs pointing at official league data feeds — e.g. the Premier League for EPL markets, UEFA for Champions League, FIFA for World Cup.

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Do I pay tax on prediction market profits in the UK?

UKGC-licensed platform profits (Betfair, Smarkets) are typically tax-free gambling winnings for UK individuals. Polymarket profits involve USDC crypto transactions, which HMRC treats as Capital Gains Tax events. Keep full transaction records and report via Self Assessment if gains exceed £3,000 per tax year.

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