Highest temperature in Shanghai on July 20?

Platform comparison

Market context

Shanghai is currently experiencing a hot, cloudy day with a high chance of local thunderstorms and precipitation near 70%, which directly suppresses the likelihood of extreme heat records today [1]. The market for the highest temperature at Shanghai Pudong International Airport on 20 July 2026 is priced at 0% YES for any range implying record-breaking heat, reflecting the immediate on-the-ground reality of scattered clouds and rain that prevent temperatures from soaring unchecked [2].

Historically, July in Shanghai frequently sees maximums between 34°C and 38°C, but the current 38°C ceiling observed today aligns with typical summer highs rather than anomalous spikes that would trigger a YES resolution for higher ranges [2]. Previous years with similar cloud cover and precipitation probabilities rarely exceeded 39°C, suggesting the 0% crowd-implied probability is grounded in robust seasonal data rather than mere speculation.

Traders should monitor real-time updates from Wunderground, the designated resolution source, as afternoon thunderstorms could further cap temperatures below 35°C [1]. With settlement ending at 12:00:00Z on 20 July 2026, the on-chain mechanics on Polygon using USDC and conditional tokens will lock in the final reading once the daily maximum is confirmed, leaving no room for post-event adjustment. The weather forecast indicates no clear-sky heatwave catalysts, reinforcing the current market stance.

Sources: 1 · 2

Methodology

This page reviews Highest temperature in Shanghai on July 20? 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 Polymarket Scam?, 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

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.

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.

Do I need to KYC for this market?

On Polymarket directly, no — it's wallet-based. Intermediary brokers like Polymarket Scam? trigger KYC only above $1,500 of lifetime trading volume; under that you trade pseudonymously with a single wallet address.

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.