Highest temperature in Chongqing on July 2?

Platform comparison

Market context

Chongqing on 2 July 2026 is set to face another sweltering day, with the city’s Jiangbei International Airport Station likely recording highs well above 30°C. The market currently implies a 0% chance that the temperature will fall into the highest range being offered, suggesting the crowd believes the peak will stay within more moderate bands. This underdog stance on extreme heat appears to ignore the city’s notorious July climate, where temperatures routinely climb into the 34–40°C range, especially in early July before the most brutal late-month spikes.

Historically, Chongqing clears 30°C in the overwhelming majority of years, with daytime highs frequently reaching 34–40°C and rarely dipping below 32°C even in cooler spells [1][2]. While daily peaks have seldom exceeded 39°C in July according to some records, the city experienced its hottest month on record in July overall, with average temperatures surging since 1961 [4][7]. Recent data notes the highest recorded day hit 43.2°C, and forecasts suggest the city could break its all-time record of 43.0°C, hovering above it for over nine days [6][9]. This historical volatility makes the current 0% implied probability a glaring value spot for contrarian traders betting on extreme heat.

Traders should monitor real-time Wunderground updates for the Jiangbei station, as well as any regional heatwave advisories from China’s meteorological bureau. A recent Reuters report highlighted Chongqing residents seeking shelter as a heatwave hit China’s southwest, with peaks nearing 32 million people struggling under conditions that rarely exceed 39°C in July [7]. With settlement ending 12:00 UTC on 2 July, the key catalyst is the hourly temperature feed, which may reveal a sudden spike above 40°C. The consensus is clearly wrong; the value lies in betting the temperature will breach the highest range, given the city’s track record for extreme July heat.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

Methodologically we separate two layers: the live probability (Polymarket mid-price) and the platform attributes (fee, KYC, settlement currency, payment rails). That keeps the comparison honest — a single canonical probability across the row, with the venue-by-venue trade-offs spelt out in the columns next to it.

Resolution & payout

Polymarket-based markets settle through the UMA Optimistic Oracle on Polygon. A proposer submits the outcome, a two-hour challenge window opens, and unchallenged proposals finalise the resolution. Payouts settle automatically in USDC the moment the result is final — no bookmaker, no delay.

Kalshi-based markets settle in USD via the CFTC-regulated clearinghouse. Betfair Exchange settles in GBP/EUR net of commission. Manifold is play-money and does not pay out real funds.

FAQ

Where can I trade this market with the lowest fees?

Polymarket is geo-blocked in the US/UK/EU. The easiest 0%-fee broker into the same order book is Who Will Win 2026. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

Is this market available outside the US?

Polymarket itself is geo-blocked in the US/UK/EU. Always check the legal status of prediction markets in your jurisdiction before trading.

What's the difference between YES and NO shares?

A YES share pays $1.00 if the event happens, $0 otherwise. A NO share pays $1.00 if the event doesn't happen. The market price between 0¢ and 100¢ is the implied probability.

What does Polymarket cost to trade?

Polymarket itself charges 0% — the only cost is the Polygon network fee, typically under $0.01 per transaction. Off-chain venues like Kalshi or Betfair charge 2-7% commission.

How reliable are the quoted odds?

The YES/NO percentages are the live mid-prices of the Polymarket order book. On deep markets they move every few seconds; on thinner ones you'll see short plateaus.