Highest temperature in Shanghai on June 30?

Platform comparison

Market context

Shanghai’s Pudong International Airport will record its peak temperature on 30 June 2026, with the market currently pricing a 31% chance that this high falls within a specific range. Historical data shows June in Shanghai typically sees daily highs climbing from 78°F to 85°F, rarely dipping below 71°F or exceeding 93°F[4]. Recent weather records confirm a peak of 88.8°F (31.6°C) on 28 June 2026, just two days prior, suggesting the region is already in a warm phase[2]. This context frames the current 31% probability as a conservative bet against the prevailing heat trend, especially when Polymarket’s frontrunner outcome is 26°C at 48%, indicating a strong divergence in crowd sentiment between platforms[1].

Traders should monitor the Shanghai Meteorological Bureau’s daily forecast updates and any sudden shifts in cloud cover or precipitation, as June averages 20.8 rain days, which could suppress peak temperatures[7]. A recent AccuWeather forecast for June 2026 projects highs between 79°F and 86°F, with overnight lows staying warm between 74°F and 78°F, reinforcing the likelihood of sustained heat[8]. The key dependency is whether the warm spell from 28 June continues or breaks; if rain arrives, the 31% YES probability may gain value, but if the heat persists, the Polymarket consensus of 26°C becomes more credible[1]. No major weather announcements are scheduled, but real-time Wunderground data will be the definitive settlement source[1].

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page reviews Highest temperature in Shanghai on June 30? 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, 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. 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.

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.

Do I need to KYC for this market?

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