Tokyo June 13 Low Temperature: Will It Hit 19°C?

A sharp 25.5% price surge in 24 hours tells you everything about how fast this market moved. Traders pushed the 19°C outcome from a coin-flip to near-certainty in a single session. The implied probability now sits at 94.5%, and with resolution arriving June 13 at noon JST, there is almost no runway left for conditions to shift.

The market question asks: what will Tokyo’s lowest recorded temperature be on June 13, 2026? The 19°C outcome trades at 0.95 YES and 0.06 NO. Resolution closes at 2026-06-13 12:00 JST. Total volume reached $7,615, with $7,197 of that moving in the last 24 hours alone.

How the Tokyo Temperature Contract Resolves

This market resolves on a single measured value: Tokyo’s official lowest temperature on June 13. The Japan Meteorological Agency (JMA) records surface air temperature at its downtown Tokyo observation station. One reading determines every outcome bracket.

• YES at 0.95 pays if Tokyo’s official minimum temperature on June 13 falls within the 19°C bracket.
• NO at 0.06 reflects the combined probability that the low lands in any other bracket: 18°C, 17°C, 16°C, 15°C, 14°C, 13°C, 12°C, 11°C or below, 20°C, or 21°C or higher.

For NO to pay, the JMA reading would need to depart from the current consensus forecast. That means either an unexpected cold front pushing the overnight low below 18°C, or warmer-than-expected conditions pulling it up to 20°C or higher. Mid-June in Tokyo historically sits in a narrow temperature band. Overnight lows rarely surprise by more than two degrees when a forecast is this settled this close to the event.

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Momentum and What the Market Is Signaling

The momentum composite here is unambiguous. A 25.5% price gain in 24 hours, a trend score of 61.40, and flat movement in the last hour combine into one clear signal: the market reached consensus fast and is now holding. The driver is straightforward. As June 13 approached, weather model outputs converged on a 19°C overnight low for central Tokyo, and traders followed that convergence.

Total volume of $7,615 is thin by prediction market standards. With $7,197 trading in the last 24 hours and liquidity at $31,673, this is a market that woke up late and moved hard. Thin markets like this can reprice sharply on a single data point. Any surprise in the JMA’s pre-dawn Tokyo reading could still move the needle, but the window is measured in hours, not days.

Key Factors

• The 25.5% 24-hour price surge and near-zero 1-hour movement signal that the market reached conviction and stopped moving. Fresh money validated the 19°C call.
• JMA’s Tokyo observation station is the sole resolution source. No alternative measurement or forecast overrides it.
• Mid-June Tokyo weather typically produces stable overnight lows in the 18°C to 21°C range, making a 19°C reading historically plausible.
• Total volume below $1M means liquidity is shallow. A late shift in the JMA forecast or an unexpected weather event could produce outsized price movement before close.
• The 30-day price range ran from 0.35 to the current 0.95, reflecting how dramatically model consensus shifted as the date approached.

Lines Analysis: What the Data Favors for Tokyo’s June 13 Low

The weather modeling consensus drove this market. When numerical weather prediction outputs align tightly on a specific temperature bracket this close to the event, markets tend to follow. Tokyo’s June 13 setup appears to fit that pattern. The 19°C bracket attracted nearly all late trading volume, which signals that informed traders reviewing forecast data landed in the same place.

The barrier for an opposing outcome is real but narrow. A nocturnal cold drainage event, a stalled frontal boundary, or an unexpected maritime influence could push the JMA reading below 18°C. Equally, a sustained warm southerly flow could lift the minimum above 20°C. Neither scenario appears in current model consensus, but low total volume means the market has not been stress-tested by large capital.

Signals to Monitor Before Resolution

• JMA’s final Tokyo area forecast update before midnight June 12: any revision to the overnight low projection would directly reprice this contract.
• Actual pre-dawn temperature readings at the Tokyo observation station: early morning values trending above 20°C or below 18°C would signal a miss.
• Regional synoptic pattern: a trough approaching Honshu from the Sea of Japan overnight could introduce variance not captured in current model runs.
• Wind direction at the Tokyo station in the early morning hours: onshore flow tends to moderate temperatures, while calm conditions allow more radiative cooling.
• Any JMA weather advisory or warning issued for the Tokyo metropolitan area before 06:00 JST on June 13.

Here’s what the measurements are telling us: a $7,615 market moved 25.5% in one day because the forecast signal got clearer, not because something changed in the atmosphere. The data doesn’t care about the politics of how this market was set up. The JMA reads what it reads. With liquidity at $31,673 against thin volume, this contract is priced on conviction, not capital depth.

LINES VERDICT

NEAR-SETTLED

The market has priced 19°C as the consensus outcome, and the momentum pattern confirms that informed traders reviewed the same forecast data and arrived at the same conclusion. With resolution hours away and model outputs stable, the 94.5% probability reflects forecast convergence more than market wisdom.

What the market says: A 94.5% implied probability puts this firmly in near-settled territory. The market is pricing forecast certainty, not scientific uncertainty. Thin volume below $1M means a surprise JMA reading before the June 13 noon resolution could still move the price sharply.

Key unknown: The single most important data point is the JMA’s actual observed minimum temperature at the Tokyo observation station in the early morning hours of June 13. Any departure from 19°C resolves this contract against the current consensus.