Tokyo July 11 Peak Heat: Market Calls It

The Tokyo temperature market for July 11 is about as settled as prediction markets get. Traders have priced the 30°C outcome at 99.8% implied probability, and the 24-hour price swing tells the whole story: this contract moved from 30 cents to a dollar in less than two days. The data doesn’t care about the politics, and right now the data is pointing straight at 30°C as the confirmed peak.

The market question asks for the highest temperature recorded in Tokyo on July 11, 2026, with resolution set for 12:00 on that date. The YES price sits at $1.00. The NO price is $0.00. Total volume has reached $53,562, with $39,627 of that trading in the last 24 hours alone.

How the Tokyo Temperature Contract Works

This contract resolves YES if Tokyo’s official high temperature on July 11 equals 30°C. A different peak reading, whether 29°C or 31°C or anything outside that specific threshold, resolves this contract NO. The resolution source is Polymarket’s own market resolution process, which draws on official meteorological observation data for Tokyo.

• YES ($1.00 / 99.8% probability): Tokyo’s official high temperature on July 11 is recorded as exactly 30°C.
• NO ($0.00 / 0.2% probability): Tokyo’s official high lands at any other value, including 29°C, 31°C, or any alternative outcome listed in the market.

A NO outcome requires a surprise deviation from what appears to be an already-occurring or confirmed measurement. The Japan Meteorological Agency records official daily highs for Tokyo at the Otemachi observation point. That reading would need to fall outside the 30°C threshold entirely. At 0.2% implied probability, the market considers that scenario nearly impossible at this stage.

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Momentum and Market Signals

The momentum picture here is unambiguous. The trend score of 64.07, combined with a 24-hour price change of +60.0% and flat movement in the last hour, signals a market that surged on a confirmed or near-confirmed reading and then stabilized. That pattern, sharp move followed by stillness at $1.00, is the signature of a market that has already resolved in traders’ minds. The most likely driver is actual temperature data from Tokyo on July 11 itself, arriving before the noon resolution cutoff.

Total volume of $53,562 is modest. The $177,111 in liquidity dwarfs the volume, which means the order book is deep relative to actual trading activity. The $39,627 traded in the last 24 hours represents the majority of all activity, concentrated entirely around the confirmation event. Volume below $1 million means a single large trade could still technically move the price, but at $1.00 with near-zero NO-side interest, that scenario is theoretical only.

Key factors driving this market:

• The YES price moved from $0.30 to $1.00 across July 10 and July 11, reflecting real-time temperature data arriving from Tokyo.
• The 24-hour price change of +60.0% is the largest single-day move in this contract’s history, concentrated on the day of resolution.
• Trader sentiment is strongly bullish at 99.8% YES, with virtually no capital on the NO side.
• Liquidity at $177,111 far exceeds volume, indicating market makers are comfortable holding inventory at $1.00.
• Open interest stands at $0.00, meaning all positions have effectively been settled or matched out.

Lines Analysis: Tokyo Temperature on July Eleven

Here’s what the measurements are telling us: Tokyo hit or confirmed a 30°C daily high on July 11. The Japan Meteorological Agency’s Otemachi station is the reference point for official Tokyo temperature records. July is deep inside Tokyo’s hot and humid summer season, when daily highs in the 30°C to 35°C range are entirely normal. A reading of exactly 30°C on July 11 is climatologically unremarkable for this time of year. The market priced that reality in hard.

The scenario where this contract fails requires the official high to land at 29°C or below, or at 31°C or above. Both outcomes carry their own separate contracts on Polymarket. The 29°C and below contracts are priced near zero. The 31°C and 32°C contracts also show minimal probability. That cross-market consistency reinforces the 30°C read. When related markets all converge on the same temperature band, the signal is strong.

Signals to monitor before the noon resolution:

• Japan Meteorological Agency publishes the official daily high for Tokyo typically within hours of the afternoon peak. A confirmed 30°C reading closes this market.
• Any automated weather station data from Otemachi showing a reading above 30.5°C or below 29.5°C would introduce rounding uncertainty at the margin.
• Related Polymarket temperature contracts for Tokyo on adjacent dates (July 10, July 12) showing 30°C or 31°C outcomes would corroborate the temperature trend.
• The resolution cutoff is 12:00 on July 11. Any late-morning temperature spike after that point would not affect resolution.
• The strong positive correlation with the Hong Kong July 10 temperature market suggests a regional heat pattern, consistent with a 30°C Tokyo reading.

Total volume of $53,562 is thin by major prediction market standards. But the market is pricing uncertainty, not science, and in this case uncertainty has essentially disappeared. The data strongly favors YES. The 0.2% NO-side probability reflects noise, not a genuine competing thesis.

LINES VERDICT

CONFIRMED HEAT

The Tokyo July 11 temperature market has done exactly what late-resolution markets do: it converged to certainty as real-world data arrived. The 30°C outcome is priced at $1.00 because the measurement is effectively in.

What the market says: At 99.8% implied probability, this market has already concluded. The sharp 60% price move in 24 hours reflects live temperature confirmation, not speculation. With the resolution cutoff at noon on July 11, virtually no time remains for the market to reprice.

Key unknown: The only remaining uncertainty is whether the Japan Meteorological Agency’s official Otemachi reading confirms exactly 30°C versus an adjacent value. At this stage, that is a rounding question, not a directional one.