Tokyo Lowest Temperature July 10 Market | Lines.com

Tokyo’s minimum temperature on July 10, 2026 sits at the center of one of the most decisive science markets on Polymarket right now. The 24C outcome holds a 98.9% implied probability heading into resolution at noon local time, reflecting a near-total consensus among traders that overnight lows will land exactly on the seasonal average. The market is pricing uncertainty, not science, and right now the uncertainty has nearly disappeared.

The implied probability opened at 31% and climbed sharply over the preceding 48 hours, gaining roughly 26% on July 9 alone. That acceleration signals fresh information flowing into the market, most likely short-range forecast models converging on a single temperature band. Total volume reached $22,538, with $9,463 trading in the final 24 hours. That late-breaking volume into a near-certainty outcome tells you traders were not chasing early value. They were confirming what the data was already showing.

What the Forecast Is Saying About Tokyo on July 10

Tokyo’s historical average daily low for July sits at approximately 24C (75F). AccuWeather’s July 2026 monthly forecast shows July 10 overnight lows consistent with that historical baseline, ranging between 23C and 24C. Here’s what the measurements are telling us: mid-July in Tokyo is hot, humid, and stubbornly stable. The Pacific High locks temperatures into a narrow band, and this year is no exception. A reading of 24C is not a surprise. It is the mean.

The remaining outcome brackets capture the tail risk. The 23C and 25C bands each represent scenarios where overnight cooling runs slightly faster or slower than the forecast model expects. The 22C and below options imply an unseasonable cool snap, while the 25C and above options require above-normal overnight humidity retention. As of the final trading window, those alternatives collectively held just over 1% of market probability. Traders treated them as noise.

The final 24-hour price surge to 0.99 reflects a market that has fully resolved in traders’ minds before the official close. Liquidity stood at $70,019, meaning the order book had depth well beyond the volume actually traded. Price discovery in this market was efficient. The convergence was orderly, not a rush.

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How the Market Priced This Outcome

The 24C outcome opened at an implied probability of 31%, meaning the market initially treated the outcome as one of several plausible candidates across a wide temperature range. By resolution eve, the probability had moved to 98.9%. That is a 67.9-percentage-point shift driven entirely by forecast data tightening, not by any policy announcement, surprise event, or breaking development. The data doesn’t care about the politics, and in a pure meteorological market, it doesn’t care about trader sentiment either. It just measures.

Total volume of $22,538 is modest for a market this decisive at close. That modestly sized book suggests the 24C market attracted confirmation traders rather than risk-seekers. The $70,019 liquidity figure dwarfs the actual volume, indicating a well-structured market with minimal slippage. Price discovery quality here is high: large order book, clean convergence, no late-breaking manipulation signal.

• The 24C outcome implied probability moved from 31% at open to 98.9% at the final hour, a 67.9-point gain over the market’s life.
• The $9,463 in 24-hour volume represents 42% of total market volume, concentrated in the confirmation phase after forecast models aligned.
• Liquidity of $70,019 against $22,538 total volume produced a clean, low-friction price signal with no evident large-trade distortion.
• The market’s structure, a multi-bracket temperature outcome set, allowed traders to express granular conviction rather than a binary yes or no position.

What This Means for Tokyo Temperature Markets Going Forward

Tokyo’s mid-July temperature regime is one of the most predictable in the Northern Hemisphere’s major urban markets. The Pacific High suppresses variability, the urban heat island adds a consistent floor, and the rainy season (tsuyu) typically exits by early July. A 24C overnight low on July 10 is not a signal of climate anomaly. It is the statistical mode. Markets that frame this outcome as a binary uncertainty are doing so because short-range forecast precision does not exist 30 days out, not because the seasonal signal is unclear.

The prediction market structure here rewards patience. Traders who entered the 24C bracket at 31% at open and held to 98.9% captured a significant implied return on a meteorologically high-confidence setup. The key insight from this market is that the early wide probability distribution was a function of forecast horizon, not genuine temperature uncertainty. As the resolution date approached, the spread collapsed precisely as weather forecast models would predict it would.

• Tokyo’s Pacific High dominance in mid-July suppresses overnight temperature variance, making the 24C bracket structurally likely once the 7-day forecast window opens.
• Future Tokyo temperature markets priced 30 or more days out should carry wide distributions as a function of forecast uncertainty, not climate uncertainty. These are not the same thing.
• The rainy season exit timing matters: a late tsuyu departure can push overnight lows higher by 1C to 2C, making the 25C bracket relevant in years with delayed seasonal transitions.
• Urban heat island effects in central Tokyo set a consistent overnight floor that makes sub-21C outcomes in July statistically rare, a factor future market makers should price more aggressively into lower brackets.

LINES RESOLUTION VERDICT

PENDING RESOLUTION

The market has functionally resolved ahead of the official close: 24C holds 98.9% implied probability, consistent with seasonal forecast data and Tokyo’s historical July overnight low baseline of approximately 24C.

What the market showed: The 24C outcome opened at 31% and reached 98.9% at the article timestamp, reflecting clean forecast convergence rather than genuine meteorological uncertainty. The market priced the forecast horizon correctly.