Highest temperature in Chengdu on July 17?

Platform comparison

Market context

Chengdu is set to record its peak daily heat at the Shuangliu International Airport Station on 17 July 2026, with the market betting on whether this figure falls within a specific Celsius range. The current crowd-implied probability of 74% YES suggests a strong consensus that the temperature will hit the upper threshold, a stance that diverges notably from broader seasonal forecasts which often temper expectations for mid-July extremes in the Sichuan basin.

Historical data from Wunderground shows that mid-July in Chengdu frequently sees highs between 33°C and 37°C, with 2022 and 2023 both recording peaks near 38°C during similar heatwaves. This pattern lends credibility to the 74% probability, as the city’s urban heat island effect and monsoon-driven humidity often push temperatures into the higher bracket, though the 2024 season saw a cooler anomaly that briefly disrupted this trend.

Traders should monitor the latest regional weather bulletins from the China Meteorological Administration, particularly any updates on the East Asian subtropical front expected to shift over the Sichuan province this week. A recent forecast from the National Centers for Environmental Prediction indicates a high-pressure ridge building over the region, which could act as the primary catalyst for a temperature spike, potentially validating the current odds if the ridge persists through the settlement window.

Methodology

This page reviews Highest temperature in Chengdu on July 17? across five venues. The live probability is the Polymarket mid-price, sourced directly from the on-chain Polygon order book; the comparison columns benchmark each venue on fee structure, KYC, settlement currency and payment rails. Every CTA routes to Best Prediction Markets UK, which mirrors the Polymarket order book at 0% fees.

Resolution & payout

At resolution the UMA oracle takes over: a proposer posts the outcome with a bond, any token holder can dispute within two hours. Without dispute the result is accepted and the smart contract distributes USDC instantly.

On Kalshi (CFTC-regulated) resolution runs through their in-house clearing engine in USD. Betfair Exchange settles after match end in the account's local currency. Manifold pays no cash — only its in-platform "mana" currency.

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 Best Prediction Markets UK. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

How does resolution work?

Through the UMA Optimistic Oracle on Polygon: a proposer submits the outcome, a two-hour challenge window opens, and USDC payouts settle automatically once the result is final.

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 fast are USDC deposits?

Polygon credits deposits after 12 confirmations — usually under 30 seconds. Withdrawals follow the same path and land back in your wallet within minutes.