Tokyo June 5 Low Temp: Will 17C Hit?

A single-day weather market for Tokyo is moving fast. The contract asking whether Tokyo’s lowest temperature on June 5 lands at 17 degrees Celsius has surged to 71.5% probability in the last 24 hours. That jump reflects fresh meteorological signals, not trader guesswork. Here’s what the measurements are telling us: early June conditions in Tokyo historically produce overnight lows clustered in the 16-to-18 degree range, and current forecasts are pointing squarely at 17.

The market question is precise: does Tokyo’s official minimum temperature on June 5 resolve at exactly 17 degrees Celsius? The YES price sits at 0.72, the NO price at 0.29, and the contract closes at 12:00 UTC on June 5, 2026. Total volume has reached $8,902, with $7,414 of that trading in the last 24 hours alone.

How the Tokyo Minimum Temperature Contract Works

This contract resolves YES if Tokyo’s recorded minimum temperature on June 5 equals exactly 17 degrees Celsius, as determined by the resolution source. It resolves NO if the minimum lands at any other value, including 16, 18, 15, 14, 13, 12, 11 or below, 19, 20, or 21 or higher. The outcome is binary and measurement-dependent: one reading, one result.

• YES (17 degrees Celsius): priced at 0.72, implying 71.5% probability.
• NO (any other temperature): priced at 0.29, implying 28.5% probability.

The NO side pays out if Tokyo’s minimum temperature on June 5 misses 17 degrees in either direction. Early June in Tokyo sees natural variability of plus or minus two degrees around seasonal norms. A cooler overnight system pushing the low to 16, or residual warmth holding it at 18, both deliver a NO outcome. The 28.5% NO probability is not trivial for a single-day weather contract.

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Momentum and Market Signals Around This Contract

The momentum composite here is strongly directional. The 24-hour price change of plus 17.5% combined with a trend score of 54.20 signals genuine conviction building, almost certainly driven by updated short-range forecast models for the Tokyo metropolitan area. When single-day weather contracts move this sharply in under 24 hours, the driver is almost always a forecast convergence: multiple models aligning on the same overnight low.

Total volume of $8,902 sits in the medium-confidence tier, with $7,414 arriving in the last 24 hours. Liquidity stands at $19,302, which is healthy relative to volume. That said, this is a thin market by absolute standards. A moderate-sized position could move the price meaningfully before the June 5 close. The market is pricing uncertainty, not science, and a single updated forecast run could reprice this contract in either direction.

Key Factors:

• The 24-hour price surge of plus 17.5% reflects forecast model convergence on 17 degrees Celsius as the most likely Tokyo minimum for June 5.
• The 1-hour change of 0.0% suggests the market has stabilized at current levels pending the next forecast update cycle.
• Liquidity at $19,302 exceeds 24-hour volume, meaning the order book can absorb new positions without dramatic slippage.
• The NO outcome covers ten alternative temperature values, spreading the 28.5% probability across a wide range of possibilities.
• The contract closes at 12:00 UTC on June 5, leaving minimal time for further repricing once the trading window opens.

Lines Analysis: Tokyo Minimum Temperature on June 5

What supports the YES outcome is straightforward. Tokyo’s early June climatology produces overnight lows consistently in the 16-to-18 degree range. When short-range forecast models converge on a specific value within that band, prediction markets follow. The 71.5% probability reflects a scenario where current numerical weather prediction output is pointing at 17 degrees with enough consistency to attract capital.

What makes the NO outcome real is the nature of exact-temperature contracts. Weather observations resolve to the nearest degree. A minimum of 16.6 degrees rounds to 17. A minimum of 17.4 rounds to 17. But a minimum of 15.5 rounds to 16, and 17.6 rounds to 18. Forecast uncertainty at the one-degree level is genuine even 24 hours out. Synoptic factors like a frontal boundary position, sea breeze timing, or urban heat island variability can shift Tokyo’s overnight low by a full degree in either direction.

Signals to Monitor:

• Japan Meteorological Agency short-range forecasts: any update showing a 16 or 18 degree low would reprice this contract sharply toward NO.
• Global Forecast System and European Centre for Medium-Range Weather Forecasts model runs: convergence on 17 degrees through the overnight of June 4-5 is the primary YES signal to watch.
• Frontal system timing: a cold front arriving earlier than forecast would push the minimum below 17 and favor NO.
• Urban heat retention: a clear, calm night in Tokyo increases radiative cooling and could push the low toward 16, while cloud cover holds warmth near 18.
• Final trading volume before contract close: a surge toward $15,000 or above would indicate strong conviction on one side and likely a late forecast update driving the move.

Total volume of $8,902 is enough to signal genuine engagement, but not enough to declare strong crowd wisdom. The data favors YES at current probability, based on forecast alignment. The single-degree resolution mechanic is the structural risk that keeps NO from collapsing entirely.

MODERATE CONVICTION YES

Forecast model convergence on 17 degrees Celsius is driving this market, and the 24-hour momentum confirms that traders are reading the same meteorological signal. The exact-temperature resolution mechanic introduces real risk that climatological probabilities alone would not suggest.

What the market says: At 71.5% implied probability, this contract is pricing 17 degrees as the most likely single outcome but not a certainty. The short time to the June 5 close compresses remaining volatility, but a single forecast update before market close could shift prices meaningfully.

Key unknown: The next Japan Meteorological Agency or global model forecast run covering the overnight of June 4-5 is the single data point that would reprice this contract. Any model output showing a persistent 16 or 18 degree low would move the NO probability above 40% immediately.

Scientific Context: Early June Temperature Patterns in Tokyo

Tokyo’s early June climate sits in a transitional zone between spring and the rainy season. The Japan Meteorological Agency records show average June minimum temperatures in Tokyo typically ranging from 15 to 19 degrees Celsius, with the distribution peaking around 17 to 18 degrees in the first week of the month. The data doesn’t care about the politics of any individual forecast: the climatological base rate supports 17 degrees as a plausible outcome, but not a dominant one on its own. Market pricing above 70% for a single exact-degree outcome implies that current forecast specificity, not just climatology, is carrying the probability.

No external regulatory or scientific publications are affecting this contract. Resolution depends entirely on the June 5 observational record and the resolution source’s measurement methodology. Price movement before the close will track forecast updates exclusively.

What does a 71.5% probability mean for this contract?

It means the market assigns roughly a seven-in-ten chance that Tokyo’s official minimum temperature on June 5 records exactly 17 degrees Celsius. That reflects current forecast alignment, not a guarantee.

What does the NO contract pay out on?

Any recorded minimum other than 17 degrees Celsius resolves NO, including 16, 18, 15, 14, or any value in the full range listed. Ten alternative outcomes split the 28.5% NO probability.

What data or event would move this market most?

An updated Japan Meteorological Agency or global model forecast showing a persistent overnight low of 16 or 18 degrees for Tokyo on June 5 would reprice this contract immediately and sharply.

When does this contract resolve?

The contract closes at 12:00 UTC on June 5, 2026, based on the official minimum temperature recorded for Tokyo on that date.

How reliable is the volume and liquidity data here?

Total volume of $8,902 is below the $10,000 threshold for high confidence. Liquidity at $19,302 is healthy, but thin markets can move sharply on a single large trade or a forecast update in the final hours.