Highest temperature in Tokyo on June 30?

Platform comparison

Market context

On 30 June 2026, Tokyo Haneda Airport is expected to experience cloudy skies with daytime highs likely settling in the mid-to-upper 20s Celsius, aligning with recent Japan Meteorological Agency forecasts that point away from extreme heat. The crowd-implied 0% probability for a "YES" outcome (presumably a temperature exceeding a specific high threshold) reflects this moderate outlook, as the market currently assigns 99% confidence to a peak of 27°C and only 1% to 28°C. This distribution mirrors historical patterns where June in central Tokyo rarely breaches the 30°C mark, with the average high hovering around 26–27°C (80°F), and recent data showing a seven-day streak where temperatures failed to reach 25°C, indicating a cooler start to the month than typical.

Traders should monitor real-time updates from Wunderground and the National Weather Service for any sudden shifts in cloud cover or humidity, as these factors could push temperatures toward the upper 28°C range. While Japan has experienced its warmest summers on record, with Nerima Ward hitting 38.6°C in a previous hottest June, the current forecast for Haneda suggests a more temperate day, with overnight lows between 20–21°C and highs capped near 27°C. The settlement window ending 12:00 UTC on 30 June means any late-morning heat spike could alter the final reading, but the prevailing trend of cloudy, humid conditions with a high chance of rain suggests the temperature will remain within the expected 27°C range, making the 0% YES probability a rational assessment of the current weather trajectory.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

Sports-specific comparison page for Highest temperature in Tokyo on June 30?. 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.

FAQ

Are prediction markets better than sports betting?

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What are live sports odds on Polymarket?

Some top-tier matches stay open during play — you can trade the half-time probability in the 70th minute. Polymarket mid-prices update second-by-second; any frontend mirroring the order book shows the same movement.

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Once the official league outcome is logged in the UMA Oracle (typically 1-2 hours after the final whistle), Polymarket's smart contract triggers USDC payout. To your wallet within minutes.

Can I import form data and lineups?

This page shows the live Polymarket quote as an implied probability. Form data and lineups must be researched separately via sports data providers (e.g. Soccerway, ESPN, FBref) — we surface the market probability, not the sport analysis.