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Shanghai Low Temp July 9: Will 26°C Hit?

Shanghai Low Temp July 9: Will 26°C Hit?

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SR Sofia Renard Climate & Science Analyst
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Lines Verdict
YES at 98% implied probability

FRAGMENTED FIELD, THIN SIGNAL: The 26°C bracket leads on meteorological plausibility in an eleven-outcome field, but 36.5% reflects spread-thin uncertainty, not settled conviction. Market probability: 36.5%.

98% Market Probability
1h +3.5% 24h +61.5% Trend Moderate (67/100)
Volume
$56.0K
$51.6K in 24h
Liquidity
$59.7K
Moderate depth
Time Left
16 hours
Resolves Jul 9
56K Vol. Jul 9, 2026
24°C $5K Vol.
98%
23°C $4K Vol.
1%
22°C $8K Vol.
0%
21°C or below $5K Vol.
0%
25°C $11K Vol.
0%
26°C $11K Vol.
0%

Shanghai sits in the middle of its hottest stretch of the year, and the question is whether the overnight low on July 9 lands exactly at 26°C. The market puts that probability at 36.5%. That is not a consensus call. It is the leading option in a multi-outcome field where eleven different temperature brackets are all competing for capital.

The market question asks for the lowest temperature in Shanghai on July 9, resolving at noon on that date. The 26°C bracket trades at 0.37 YES and 0.64 NO. Total volume stands at $3,933, and all of that moved in the last 24 hours. Liquidity sits at $38,763, which is deep relative to volume and suggests the order book is well-stocked even if trader activity is thin.

How the Shanghai Temperature Contract Works

This market resolves to YES if the official lowest recorded temperature in Shanghai on July 9, 2026 falls in the 26°C bracket. Resolution is set for July 9 at 12:00 UTC. The responsible data source is the market resolution provider, which tracks official meteorological readings.

  • YES (0.37): The lowest temperature on July 9 hits exactly 26°C.
  • NO (0.64): The overnight low lands anywhere outside the 26°C bracket, including 25°C, 27°C, or any other listed outcome.

The 26°C bracket misses whenever Shanghai’s minimum temperature drifts even one degree in either direction. July nights in Shanghai regularly hold above 25°C during heatwave conditions, but readings at 27°C or 28°C are equally possible during active summer heat. The NO side collects if any of the ten competing brackets captures the actual reading.

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Momentum and Market Signals

The momentum composite is flat over the last hour (0.0% change) with no 24-hour comparison available. The trend score of 37.91 is moderate, consistent with a market that settled into its current range rather than moving on fresh data. The 26°C bracket did see a 7% price drop on July 7, suggesting early traders shifted some capital toward adjacent brackets.

Total volume is $3,933, all arriving in the last 24 hours. That qualifies as thin. Liquidity at $38,763 is healthy by comparison, meaning the spread is stable, but a single large bet could reprice this contract sharply. Anyone watching this market should treat the current 36.5% as a fragile consensus, not a settled one.

  • The 1h price change is 0.0% and the 24h baseline is unavailable, so the dominant signal is the July 7 dip of 7% from the open price of 0.32 to current levels.
  • The 26°C bracket holds the leading probability in this field, but 63.5% of the market is positioned against it landing exactly here.
  • Thin volume below $10,000 means liquidity-driven price moves are possible before the July 9 resolution.
  • The 30-day range ran from 0.32 to 0.44, and the contract is currently near the lower end of that band.

Lines Analysis: Shanghai on July Nine

Shanghai’s July overnight lows typically cluster between 25°C and 28°C during active summer heat. The 26°C bracket captures a plausible central range, which explains why it leads a fragmented multi-outcome field. Weather models for eastern China through early July show persistent warm air masses, with overnight temperatures staying elevated. The 26°C reading is meteorologically reasonable, but it competes directly with 27°C and 25°C brackets that are likely priced close behind it.

The path to NO is straightforward: Shanghai’s minimum temperature on July 9 lands at 27°C or higher, which is equally common during peak summer heatwaves in the Yangtze Delta. A stronger-than-expected heat pulse could push overnight lows to 28°C or 29°C. Conversely, any cloud cover or rain event ahead of July 9 could drag the minimum toward 25°C or 24°C. Either outcome pays NO.

  • Shanghai Meteorological Bureau hourly temperature data for the evening of July 8 into early July 9 will be the decisive signal.
  • Any typhoon or tropical disturbance approaching the East China Sea before July 9 could shift overnight temperatures dramatically.
  • National Meteorological Center of China forecasts for Yangtze River Basin heat intensity in the July 8 to 10 window matter directly.
  • Regional sea surface temperatures in the East China Sea influence overnight humidity and minimum temperature retention.
  • Forecast model consensus between ECMWF and GFS for Shanghai surface temperatures on July 9 will likely reprice adjacent brackets in the hours before resolution.

The $3,933 in total volume reflects a market with real price discovery but limited capital depth. The data favors the 26°C bracket as the single most likely outcome in a fragmented field, but 36.5% is not a strong probability. The market is pricing genuine uncertainty across eleven possible temperature readings, and the actual outcome depends on meteorological conditions 48 hours out.

LINES VERDICT

FRAGMENTED FIELD, THIN SIGNAL

The 26°C bracket leads this multi-outcome market on meteorological plausibility, but the 36.5% probability reflects how spread thin the field is, not strong conviction that this reading is locked in.

What the market says: 36.5% implied probability for the 26°C bracket, meaning the market sees it as the most likely single outcome but still expects to be wrong roughly two-thirds of the time. With resolution in under 48 hours and thin volume below $4,000, this price could shift quickly on any updated forecast.

Key unknown: The Shanghai Meteorological Bureau reading for the early morning hours of July 9 is the only thing that settles this contract. Any significant weather pattern shift in the next 36 hours, including convective activity or a strengthening heat dome, could move adjacent brackets into contention.

Frequently Asked Questions

The 26°C bracket has the best individual odds in the field, but the market still expects it to miss about two-thirds of the time. Eleven brackets compete for the actual reading.

NO pays if Shanghai's lowest temperature on July 9 lands in any bracket other than 26°C. That includes 25°C, 27°C, 28°C, or any other listed outcome.

Updated 48-hour forecasts from ECMWF or GFS for Shanghai surface temperatures on July 9 would shift capital between adjacent brackets within hours of publication.

Resolution is set for July 9, 2026 at 12:00 UTC, based on the official lowest temperature recorded in Shanghai on that date.

Total volume is $3,933, which is thin. Liquidity at $38,763 keeps the spread stable, but a single large trade could move the 26°C bracket price significantly before resolution.

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 trades. All trade flows deep-link to Polymarket via our affiliate code. Probabilities shown are market-implied and not predictions or recommendations.

What Could Shift These Probabilities?

Heat Dome Holds at 26°C Floor

A stable, moderate heat dome over the Yangtze Delta keeps Shanghai overnight lows right at 26°C on July 9. No convective activity disrupts the temperature pattern. Forecast models converge on this reading in the 36-hour window, and capital flows into the 26°C bracket, pushing probability toward 50% or higher before resolution.

Heat Intensifies, Low Shifts to 27°C or 28°C

A strengthening heat pulse across eastern China pushes Shanghai's overnight low above 26°C. The 27°C or 28°C brackets capture more capital as forecast models signal a hotter-than-expected night. The 26°C bracket drops below 30%, and NO bets collect across the majority of the field.

Cloud Cover Drops Low to 25°C

Increased cloud cover or a brief rain event on July 8 reduces overnight heat retention. Shanghai's minimum temperature falls to 25°C instead of 26°C. The 25°C bracket gains sharply, the 26°C bracket loses capital, and NO pays out. This scenario requires a meaningful weather pattern shift in a short window.

Tropical System Disrupts the Entire Field

A tropical disturbance or typhoon approaching the East China Sea before July 9 could push Shanghai's overnight low to 23°C or below, or drive humidity-fueled minimums to 29°C or higher. Either extreme collapse the 26°C bracket entirely. Low-probability brackets at the tails would reprice dramatically within hours.

Key macro factor: Shanghai's July climate is governed by the Western Pacific subtropical high; the strength and positioning of that pressure system in the July 8 to 10 window is the single largest determinant of where overnight lows land across this entire field.

Market Timeline

Jul 7, 4:30 AM
Market Created
Jul 7, 4:30 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.