Tokyo June 3 Low Temp: 19°C at Near-Even Odds

Tokyo’s overnight low on June 3 is splitting the market almost perfectly down the middle. The 19°C outcome sits at 49% implied probability, with less than 36 hours until resolution. A 31% surge in the YES price over the past 24 hours tells the real story here: traders are repositioning hard as the date closes in.

The market question asks for the lowest recorded temperature in Tokyo on June 3, resolving at 12:00 JST on June 3, 2026. The YES contract on 19°C trades at $0.49. The NO contract trades at $0.51. Total volume sits at $3,690, with $2,954 of that moving in the last 24 hours. The market closes June 3, 2026.

How the Tokyo June 3 Low Temperature Contract Works

This contract resolves YES if Tokyo’s official minimum temperature on June 3 is exactly 19°C. The Japan Meteorological Agency records and publishes daily minimum temperatures for Tokyo. Resolution happens at 12:00 JST on June 3. Any reading above or below 19°C resolves this contract NO.

• YES (19°C): $0.49 per share, implying a 49% probability of an exact 19°C minimum.
• NO (not 19°C): $0.51 per share, covering all other outcomes including 18°C, 20°C, 21°C, and the full spread from 14°C or below to 24°C or higher.

The NO contract wins whenever Tokyo’s minimum temperature on June 3 lands anywhere except exactly 19°C. That’s the mathematical reality of exact-outcome weather markets. The Japan Meteorological Agency could record 18°C, 20°C, or any other value, and NO pays out in full. The 51% NO probability reflects that spread across eleven competing outcomes.

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Momentum and Market Signals Moving Into Resolution

The combined momentum signal is unmistakably bullish for 19°C. The YES price climbed 31% in 24 hours, the trend score sits at 55.33, and the 1-hour change is flat, suggesting the repositioning surge has stabilized. The likely driver is updated numerical weather prediction models for Tokyo on June 2 and 3, which would narrow forecast uncertainty as the date approaches.

Total volume of $3,690 is thin. The $2,954 that moved in 24 hours represents nearly 80% of all market activity, confirming this is a late-breaking positioning event, not a deep-conviction market. Liquidity stands at $21,695, meaning the order book is actually deeper than the trading volume suggests. But at this total size, a single new weather model run or a reported overnight low from a nearby station could move this price sharply before resolution.

• The YES price jumped 31% in 24 hours, with most movement concentrated on June 2, pointing to updated forecast data as the trigger.
• The 1-hour price change is flat at 0.0%, suggesting the initial repositioning wave has run its course for now.
• Total volume below $1,000 is typical for exact-temperature markets; the thin book means new information reprices this contract fast.
• The 49%/51% split between YES and NO is statistically indistinguishable from a coin flip, reflecting genuine forecast uncertainty at this exact temperature level.
• Eleven competing outcomes split the NO probability, but 18°C and 20°C are likely absorbing most of the adjacent probability mass.

Lines Analysis: What the Tokyo Temperature Data Actually Says

Early June in Tokyo typically sees minimum temperatures in the 18°C to 21°C range. The Japan Meteorological Agency’s historical records show June 3 minimum temperatures clustered in that band, with 19°C representing a plausible but not dominant single outcome. The 31% price surge on the YES contract suggests numerical weather prediction models have been converging on 19°C as the most likely single value, but convergence on one number in a granular temperature market still means significant uncertainty.

The NO side gets support from basic probability math. Even if forecast models center on 19°C, the actual recorded minimum could resolve at 18°C or 20°C due to measurement timing, urban heat island variability within the Tokyo observation network, or overnight conditions that deviate slightly from the model run. The Japan Meteorological Agency uses a specific observation station for official records. Small deviations at that station are the primary NO scenario.

• Japan Meteorological Agency forecast convergence toward 19°C would push YES above 55% before resolution.
• Any model run showing the overnight low shifting toward 18°C or 20°C would reprice NO sharply upward.
• Reported overnight lows from Tokyo’s broader station network in the hours before 12:00 JST would be the sharpest leading indicator.
• Unusual synoptic patterns, like an unseasonable cold front or warm advection event, could shift the distribution toward the tails (16°C or below, 21°C or above).

At $3,690 total volume, this market is a speculative temperature precision trade, not a deep liquidity event. The data currently favors 19°C as the single most likely outcome, but the NO contract reflects the real possibility that the actual reading lands one degree in either direction. Here’s what the measurements are telling us: the models like 19°C, but exact-degree weather markets are priced on uncertainty by design.

LINES VERDICT

NEAR-EVEN CALL WITH LATE MOMENTUM FAVORING YES

The 24-hour momentum surge and forecast model convergence point toward 19°C, but this is a precision weather market resolving in hours, and the NO contract covers ten other outcomes. The data doesn’t care about the politics, and here the data is genuinely close.

What the market says: 49% implied probability on 19°C. That’s near-even odds with no strong directional conviction. The price can move sharply on any new model output or early observational data before the 12:00 JST resolution cutoff.

Key unknown: The Japan Meteorological Agency’s official minimum temperature reading at the Tokyo observation station on June 3 is the only fact that matters. Any forecast or model output published in the hours before resolution is the last chance to reprice this contract.

Scientific Context: Tokyo June Temperature Climatology

Tokyo’s early June climate sits in the pre-rainy season (pre-tsuyu) period, when minimum temperatures typically range from 17°C to 22°C depending on synoptic conditions. The Japan Meteorological Agency records official daily minimum temperatures at the Tokyo observation station in Chiyoda. Historical June 3 minimum temperatures cluster around 18°C to 20°C, making 19°C a central estimate but not a statistical dominant. The market is pricing uncertainty, not science, and that’s exactly what a 49%/51% split reflects in a multi-outcome exact-value contract.

What moves this before June 3, 2026: Updated Japan Meteorological Agency forecast model output, early morning temperature reports from the Tokyo observation network, and any unusual weather pattern shift (cold front, warm advection, or prolonged cloud cover) would all reprice this contract before the noon resolution cutoff.

What is the probability percentage in this market?

The YES contract on 19°C implies a 49% probability. That means traders collectively estimate roughly even odds that Tokyo’s official minimum on June 3 lands exactly at 19°C.

What does the NO contract cover?

The NO contract pays out if Tokyo’s June 3 minimum is anything other than 19°C. That includes 18°C, 20°C, 21°C, 17°C, and all other outcomes listed in this market.

What event would most move this price?

Any Japan Meteorological Agency model update or early morning observational data from Tokyo stations showing the overnight low trending toward 18°C or 20°C would sharply reprice both YES and NO contracts before resolution.

When does this market resolve?

This market resolves at 12:00 JST on June 3, 2026, based on the Japan Meteorological Agency’s official minimum temperature reading for that date.

How reliable is the volume and liquidity data?

Total volume is $3,690, which is thin. Liquidity at $21,695 is deeper than the trading volume suggests, but any single new data point can move this price sharply given the small number of active traders.