Highest temperature in Shanghai on June 23?

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Market context

The underlying event is the daily peak temperature recorded at Shanghai Pudong International Airport on 23 June 2026, a date that historically falls within Shanghai’s wettest month. June averages 11.7 rainy days at the airport, with precipitation often suppressing daytime highs and limiting thermal extremes. This climatic pattern explains why the crowd-implied probability of a high-temperature outcome sits at 0%: rain and cloud cover are the dominant weather drivers, not heat.

Historical data from June 2025 shows maximum temperatures rarely exceeding 32°C, with frequent dips below 28°C due to persistent showers. Comparable years confirm that late June in Shanghai is characterised by moderate warmth rather than extreme heat, reinforcing the market’s current pricing. Traders should monitor Wunderground’s hourly updates for the day, as well as any sudden shifts in regional pressure systems that could alter cloud cover. While no political debates or campaign-finance disclosures directly influence weather, unexpected meteorological announcements from the National Weather Service could serve as catalysts. According to BBC Weather, heavy rain is forecast for Tuesday 23 June, further supporting the low-probability stance on high temperatures. The market leans on the consistent rainfall catalyst, not any human event.

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Methodology

This page tracks Highest temperature in Shanghai on June 23? across four political prediction venues. Live odds come from the Polymarket order book (the deepest political prediction-market book). Kalshi is the CFTC-regulated US alternative, Betfair the established UK sports-exchange with politics markets, Manifold the open play-money variant. Election Predictions UK routes every trade through to Polymarket — at 0% fees.

Resolution & payout

Political markets typically settle on official candidate or agency confirmation. Polymarket uses UMA Optimistic Oracle: a proposer posts the outcome with a bond, the two-hour window opens, then the smart contract pays USDC.

Kalshi settles USD via CFTC clearinghouse, with clearly defined resolution sources (e.g. AP race calls for elections). Betfair settles after the official outcome is registered with the league or agency. Manifold is play-money.

FAQ

Where can I trade this market with the lowest fees?

On Election Predictions UK, which mirrors the Polymarket order book at 0% fees. 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 does it cost to trade on Election Predictions UK?

Zero. Election Predictions UK routes every order to the live Polymarket order book; the only cost is the Polygon network fee, typically under $0.01 per transaction.

Do I need to KYC for this market?

Not under $1,500 of lifetime trading volume. Above that threshold, Election Predictions UK triggers a quick verification flow that finishes in minutes.

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.