Tokyo June 12 Low Temperature: 19°C at 44.5%

Tokyo’s overnight low on June 12 is one of those markets where weather modeling and trader sentiment collide in real time. The market currently prices a 44.5% chance that the lowest temperature lands exactly at 19°C. That is a meaningful lead over neighboring outcomes, but it is far from settled. With less than 30 hours until resolution, the data picture is still shifting.

The market question asks: what will the lowest temperature in Tokyo be on June 12? The 19°C outcome sits at $0.45 YES against $0.56 NO, with $4,767 in total volume and resolution set for June 12 at 12:00 UTC. Volume is thin. The $22,778 in liquidity means prices can move sharply on any fresh weather data or updated forecast models.

How the Tokyo June 12 Low Temperature Contract Works

This contract resolves YES if the official lowest temperature recorded in Tokyo on June 12 equals exactly 19°C. The resolution source is Polymarket’s market resolution process, which draws on official meteorological records. Eleven discrete outcomes are listed, from 14°C or below through 24°C or higher, so each outcome competes directly against the others.

• 19°C YES is priced at $0.45, implying a 44.5% probability.
• Every other outcome combined accounts for the remaining 55.5%.

The case against 19°C is straightforward: the low could settle one degree in either direction and the YES contract pays nothing. Tokyo’s June overnight lows cluster in the 18°C to 21°C band, meaning 18°C and 20°C are the most direct competitors for trader capital right now.

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Momentum and Market Signals

The momentum picture here is dominated by a single strong move: the 19°C contract gained 8.5% over the past 24 hours, with the trend score sitting at 40.23. That kind of directional push in a thin market typically reflects updated short-range forecast models converging on a specific temperature band. When numerical weather prediction models tighten around a value, traders respond fast.

Total volume stands at $4,767, with $4,212 of that arriving in the last 24 hours. That means almost all the market activity happened in one day. Liquidity of $22,778 is relatively deep compared to volume, but the thin total trade count means a single large bet could reprice the contract significantly before June 12.

• The 24-hour price change of +8.5% is the dominant signal, pointing to renewed trader conviction around the 19°C band.
• The 1-hour change of +0.0% suggests that conviction has paused, not reversed.
• Trend score of 40.23 sits in moderate territory, meaning the move has momentum but is not yet confirmed.
• Volume below $1M is a direct flag: thin liquidity means price can move sharply on any updated Japan Meteorological Agency forecast or overnight weather data.
• Trader sentiment reads 44.5% YES versus 55.5% NO, a leaning-bearish market that still gives 19°C the best single-outcome position.

Lines Analysis: Tokyo’s June Low and the One-Degree Problem

Here’s what the measurements are telling us. Tokyo in mid-June sits in a transitional window between the tail end of late spring and the opening of the rainy season. The city’s June overnight lows have historically ranged from 17°C to 22°C during the first two weeks of the month. A 19°C low is squarely in the middle of that range, which is exactly why the market is pricing it as the lead outcome without overwhelming conviction.

The primary risk to the 19°C position is the one-degree problem. Japan Meteorological Agency surface observations are precise. If the actual low records at 18.6°C, the 18°C outcome wins. If it records at 19.4°C, the 19°C outcome wins. That granularity is the entire game in this market. The 20°C and 18°C outcomes are the most direct threats, and neither requires a dramatic weather event to materialize.

• Japan Meteorological Agency publishes hourly surface temperature data for central Tokyo. Any update showing overnight temperatures trending warmer would push capital toward 20°C or 21°C.
• An approaching frontal system or enhanced cloud cover overnight would suppress the low, pushing probability toward 18°C or 17°C.
• Short-range ensemble models from the European Centre for Medium-Range Weather Forecasts and the Global Forecast System are the key data sources to watch in the next 12 hours.
• The rainy season onset in Tokyo typically moderates overnight lows by maintaining humidity and cloud cover. If the front arrives early, the low could be warmer than current models suggest.

The data doesn’t care about the politics, and in this market, there is no politics. There is only one question: does Tokyo’s thermometer settle at exactly 19°C before dawn on June 12? With $4,767 in total volume, this is a thin, specialist market. The 24-hour momentum move suggests traders who track Tokyo weather closely moved capital into 19°C on updated forecast data. That is the clearest directional signal available right now, and no competing outcome has shown comparable momentum.

LINES VERDICT

NARROW LEAD, HIGH UNCERTAINTY

The 19°C outcome holds the best single-position in an eleven-way market, and the 24-hour momentum move reflects real forecast-model convergence. But the one-degree resolution structure means this market stays genuinely uncertain until the final temperature record is logged.

What the market says: At 44.5%, the market is pricing 19°C as the most likely single outcome but explicitly leaving more than half the probability on other outcomes. Thin volume means the price is volatile and could shift sharply before the June 12 resolution.

Key unknown: The Japan Meteorological Agency’s overnight surface temperature reading for central Tokyo on June 12 is the single data point that determines everything. Any forecast model update in the next 12 hours showing a shift toward 18°C or 20°C would reprice this contract immediately.