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Chongqing June 28 High: Will 25°C Hold?

Chongqing June 28 High: Will 25°C Hold?

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SR Sofia Renard Climate & Science Analyst
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Lines Verdict
YES at 100% implied probability

LEANING YES: Fresh forecast data appears to have driven a sharp 29% surge, pushing the 25°C outcome to 62.5%. Thin volume limits conviction. Market probability: 63%.

100% Market Probability
1h +0.0% 24h +65.5% Trend Moderate (65/100)
Volume
$75.9K
$65.4K in 24h
Liquidity
$128.0K
Deep liquidity
Time Left
6 hours
Resolves Jun 28
76K Vol. Jun 28, 2026
25°C $17K Vol.
100%
29°C or higher $6K Vol.
0%
19°C or below $589 Vol.
0%

Chongqing’s weather market is moving fast. The contract pricing a peak temperature of exactly 25°C on June 28 has jumped 29% in the past 24 hours, with an 18% spike in the most recent hour alone. That kind of momentum in a one-day weather window is a signal worth paying attention to. The market now sits at 62.5% implied probability, meaning traders are leaning toward 25°C as the likeliest single outcome from a field that spans 19°C or below all the way to 29°C or higher.

The market question asks: what will the highest temperature in Chongqing be on June 28? The YES contract prices the 25°C outcome at $0.63. The NO contract, covering every other outcome, sits at $0.38. This market resolves on June 28 at 12:00 UTC. Total volume stands at $45,229, with $42,455 of that arriving in the last 24 hours alone.

How the 25°C Contract Works

This is a discrete outcome market, not a binary above-or-below threshold. YES pays out only if the official peak temperature recorded in Chongqing on June 28 lands exactly at 25°C. The full outcome ladder runs from 19°C or below up through 29°C or higher. That structure matters: a reading of 26°C is a NO, just as much as a reading of 22°C would be.

  • YES ($0.63, 62.5%): Peak temperature resolves at exactly 25°C on June 28.
  • NO ($0.38, 37.5%): Any other reading resolves the contract against the 25°C outcome, including 24°C, 26°C, or any other step on the ladder.

The NO side has a wide coalition backing it. A temperature overshoot to 26°C or a cooler-than-expected reading at 24°C both cash out the NO contract. In late June, Chongqing sits in the heart of its warm season. The city is known for intense summer heat, often pushing well above 30°C by July. A 25°C reading would represent a notably mild day for the region at this time of year, which is precisely why this outcome commands attention: a rain event, cloud cover, or an early-season front could suppress the peak enough to land right in that band.

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Momentum and Market Signals: A One-Day Surge Tells the Story

The momentum composite here is unusually sharp for a weather contract. A trend score of 81.37, paired with a 29% 24-hour gain and an 18% single-hour move, points to a specific trigger: fresh meteorological data or a forecast update that traders read as confirming a mild, cloud-moderated day on June 28. Here’s what the measurements are telling us: someone got new information and moved fast.

Total volume at $45,229 is thin by prediction market standards. The fact that $42,455 arrived in the past 24 hours means this market was essentially dormant before today. Thin liquidity, at $84,908 in the order book, means the price can move sharply on even modest new trades. A single large position could push the contract well above or below its current level before resolution tomorrow.

  • The 1-hour and 24-hour price changes are both positive and large, signaling a one-directional conviction push rather than back-and-forth trading.
  • Trader sentiment sits at 62.5% YES versus 37.5% NO, consistent with the price, meaning no hidden divergence between position sizing and directional lean.
  • Volume below $1M means this market is vulnerable to sharp price dislocations if new forecast data lands before 12:00 UTC on June 28.
  • The trend score of 81.37 is high for a short-duration weather contract, suggesting this move is not noise.
  • The market opened at $0.24 and has nearly tripled from that base, reflecting a major update in trader expectations.

Lines Analysis: What the Data Favors for Chongqing

The data doesn’t care about the politics, and in this case, there are no politics. This is a pure meteorological bet. The sharp price move to 62.5% suggests the dominant scenario is a mild, moderated June 28 in Chongqing. Late June in the city typically sees highs well above 25°C, so a reading in that range would require a weather system, cloud deck, or precipitation event suppressing daytime heating. Traders appear to have priced in exactly that kind of moderating factor.

The risk to the 25°C outcome is a temperature overshoot. Chongqing’s basin geography traps heat effectively, and a dry, sunny June 28 could push the peak to 26°C or 27°C, both of which resolve as NO. The outcome ladder’s granularity is the key structural risk: 25°C is one step, and missing by one degree in either direction is a full loss for YES holders. A quick-moving cold front could also push the peak below 25°C, landing at 24°C and equally invalidating the YES contract.

Signals to monitor before June 28 resolution:

  • China Meteorological Administration forecasts for Chongqing on June 28 will be the decisive signal. Any update showing clearing skies or a heat spike reprices the NO side.
  • Precipitation or cloud cover forecasts for the Chongqing Basin on June 27 evening and June 28 morning are the most direct leading indicator.
  • Regional temperature readings from neighboring Sichuan stations can serve as a real-time proxy for incoming air mass conditions.
  • Any revision to the synoptic pattern over southwestern China, including shifts in the western Pacific subtropical high, could push the peak temperature band up or down.
  • A sudden increase in YES volume in the final hours before resolution would signal that traders with access to short-range model output are adding conviction.

The market is pricing uncertainty, not science. Total volume of $45,229 is thin, and the sharp 24-hour surge reflects a single wave of new information rather than broad consensus. The data currently favors the 25°C outcome, but the resolution window is narrow and the measurement is precise. One-degree errors in either direction flip the outcome entirely.

LINES VERDICT

LEANING YES, WITH CAUTION

The momentum is real and the trigger appears to be specific forecast data, but thin liquidity and the single-degree precision of this contract make it volatile right up to the June 28 close.

What the market says: At 62.5% implied probability, traders assign just under two-in-three odds to a 25°C peak in Chongqing on June 28. That is a meaningful lean, but the resolution window closes in less than 24 hours and the price has already tripled from its opening level, meaning most of the easy movement has happened.

Key unknown: The single most important input is the China Meteorological Administration’s final short-range forecast for Chongqing on June 28. A model showing a clearing trend or afternoon sun would push the expected peak above 25°C and reprice the NO side sharply before resolution.

Frequently Asked Questions

It means traders assign roughly a two-in-three chance that the highest temperature in Chongqing on June 28 will land exactly at 25°C. The remaining 37.5% covers every other outcome on the ladder.

Any peak temperature other than exactly 25°C resolves as NO. A reading of 24°C, 26°C, or any other step on the outcome ladder, from 19°C or below to 29°C or higher, cashes out the NO side.

A fresh forecast from the China Meteorological Administration showing clearing skies or a heat spike over Chongqing on June 28 would reprice the contract significantly before its noon UTC resolution.

The market resolves on June 28, 2026 at 12:00 UTC, based on the official peak temperature recorded in Chongqing for that date.

Total volume is $45,229, which is thin. Nearly all of it arrived in 24 hours. Low liquidity means a single trade can move the price sharply, so treat the 62.5% figure as directional, not precise.

We aggregate the live positions of the top 50 Polymarket whales (ranked by 30-day tracked volume) into one composite reading per market. It refreshes every hour. The percentage shows how many of those whales hold YES versus NO; the net dollar position shows the cohort's directional exposure in dollars.

A convergence event fires when three or more tracked wallets buy the same outcome on the same market within a four-hour window. We surface these in the activity feed and the VIP digest.

No. Lines is an editorial and data product. We do not operate prediction markets, custody funds, or accept bets. All bet flows deep-link to Polymarket via our affiliate code. Probabilities shown are market-implied and not predictions or recommendations.

What Could Shift These Probabilities?

Cloud Cover Suppresses Peak

A cloud deck or overnight precipitation system limits daytime heating in the Chongqing Basin, keeping the June 28 peak within the 25°C band. China Meteorological Administration short-range models confirm the moderating pattern. YES holders collect at resolution and the market closes near 90% in the final hours.

Basin Heat Pushes Overshoot

Chongqing's enclosed geography traps daytime heat, and a drier-than-expected June 28 pushes the peak to 26°C or 27°C. The YES contract collapses as traders reprice toward the adjacent outcome steps. The NO side captures value from a meteorologically typical late-June reading.

Cold Front Lands Below Target

An earlier-than-forecast front drops the Chongqing peak to 24°C or below, handing the NO side a win from an unexpected direction. The 25°C outcome misses not from heat but from excess cooling. This scenario benefits NO holders regardless of which step captures the final reading.

Late Model Update Triggers Cascade

A 00Z or 06Z model run in the final 12 hours before resolution shows a dramatic shift in the synoptic pattern over southwestern China. Traders with access to short-range ensemble data flood the market, moving thin liquidity by 20% or more in either direction before the 12:00 UTC close.

Key macro factor: The western Pacific subtropical high's position in late June directly controls heat dome strength over the Sichuan Basin, making large-scale circulation the primary macro driver of Chongqing's June 28 peak temperature.

Market Timeline

Jun 26, 4:02 AM
Market Created
Jun 26, 4:03 AM
Market Opened
12:00 PM
Market Resolution

Market Comments

Probabilities shown are market-implied and not predictions or recommendations. This content is for informational purposes only.