Shanghai June 26 Low Temp: Will It Hit 21°C?

A single degree of temperature is separating traders on this market. Shanghai’s lowest temperature on June 26 is priced at 64.5% to land exactly at 21°C, a number that jumped hard in the last 24 hours. Here’s what the measurements are telling us: late June in Shanghai sits in the heart of the pre-typhoon humid season, where overnight lows cluster tightly in the 20-23°C band. The market has moved decisively toward one specific outcome.

The market question asks for the lowest recorded temperature in Shanghai on June 26. The YES price stands at 0.65, the NO price at 0.36, and the contract resolves on June 26, 2026 at 12:00 UTC. Total volume is $12,375, nearly all of it traded in the last 24 hours.

How the 21°C Contract Works

This contract resolves YES if Shanghai’s official minimum temperature on June 26 records exactly 21°C. A reading of 20°C or 22°C would resolve this contract NO, sending value to those alternative outcome markets. The resolution source is the market’s designated weather data provider, which uses official Shanghai meteorological station records.

• YES at 0.65: Shanghai’s June 26 minimum temperature lands at exactly 21°C.
• NO at 0.36: The minimum temperature lands at any other value, including 20°C, 22°C, 19°C, 23°C, or outside the 19-23°C range entirely.

The NO side covers a wide spread of outcomes. A warmer-than-expected night pushes the minimum above 21°C, while an unexpected cold front or rain event could drop it to 20°C or below. Shanghai’s urban heat island effect tends to keep overnight lows elevated in late June, which is part of why the 21-23°C band dominates trader attention. The data doesn’t care about the politics of how many outcomes are listed: the narrower the winning bin, the harder a precise resolution is to price.

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Momentum and Market Signals

The combined momentum signal here is sharp and recent. The 21°C contract gained 21.0% in the last 24 hours with a trend score of 59.80, meaning traders moved capital quickly and decisively toward this outcome. That kind of single-day repricing on a short-horizon weather contract usually reflects a weather model update or a strong near-term forecast that traders acted on together.

Total volume is $12,375, with $11,983 of that arriving in the last 24 hours. Liquidity stands at $14,961. The market is pricing uncertainty, not science, but the thin overall volume means a single large trade can move this contract sharply before resolution tomorrow morning. This is a low-volume, short-duration weather market, and that combination amplifies price sensitivity to any new forecast signal.

• The 24-hour price change of +21.0% combined with a trend score near 60 signals a strong directional shift, almost certainly tied to a specific weather model run favoring 21°C overnight lows.
• Liquidity at $14,961 is healthy relative to the $12,375 total volume, meaning the order book can absorb moderate new positions without major slippage.
• The 1-hour price change of 0.0% suggests the initial surge has stabilized, and the market is now waiting for the actual overnight temperature reading.
• Shanghai’s June 26 historical overnight lows cluster between 21°C and 23°C for this calendar date, which supports the current market lean.
• Alternative outcomes at 22°C and 20°C are the closest competitors, and any forecast shift of one degree would reprice all three contracts simultaneously.

Lines Analysis: Shanghai’s Overnight Temperature Window

Late June in Shanghai is governed by the East Asian summer monsoon pattern. The city’s overnight lows in the third week of June typically land between 21°C and 24°C under normal monsoon conditions, with the lower end of that range more common when cloud cover and humidity suppress daytime heating without triggering a major cold event. The 21°C outcome sits at the cooler edge of what is climatologically normal for this date, which is precisely why trader interest has concentrated there after a 24-hour repricing event.

The strongest risk to the 21°C outcome is a warmer overnight, not a colder one. If Shanghai’s urban heat island and residual daytime warmth keep the minimum above 22°C, the 21°C contract misses. Conversely, an unexpected thunderstorm or rain event after midnight on June 26 could cool the overnight low to 20°C or below, also invalidating this outcome. Weather markets at this precision level are genuinely binary on small temperature swings.

• Shanghai Meteorological Bureau releases official station data after the observation window closes. Any revision to the minimum temperature reading would directly reprice this contract.
• European Centre for Medium-Range Weather Forecasts model output for Shanghai’s June 26 overnight low is the single most-watched signal right now.
• Cloud cover and precipitation probability for the overnight window of June 25-26 is the key physical driver. Rain cools; clear skies under humidity hold warmth.
• The 22°C outcome contract is the closest alternative. Watch its price as a real-time signal for whether traders are shifting the expected minimum upward.
• Resolution occurs at market close on June 26 at 12:00 UTC, which is 20:00 local Shanghai time. The minimum temperature for the calendar day will be known well before then.

Total volume of $12,375 is thin by prediction market standards, but the concentration of that volume in the last 24 hours tells you traders have a view and acted on it. The current data and trader positioning favor 21°C, but the precision requirement of hitting a single degree bin means the NO side still holds real value. The market is pricing a specific forecast, not a range.

LINES VERDICT

Tentative Lean Toward YES, With Weather Model Risk

The 24-hour price surge reflects a real forecast signal. One degree bins on short-horizon weather markets are inherently uncertain, and the NO basket covers far more scenarios than YES does.

What the market says: At 64.5%, traders see the 21°C outcome as more likely than not, but that still leaves more than one-in-three odds that Shanghai’s minimum lands somewhere else. With resolution less than 24 hours away, this price can move hard on any forecast update.

Key unknown: The final European and GFS model runs for Shanghai’s overnight low on June 25-26 are the decisive data points. A one-degree shift in the model consensus would reprice this contract and its nearest neighbors immediately.