Highest temperature in Shanghai on June 23?

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Market context

The underlying event is the highest temperature recorded at Shanghai Pudong International Airport on 23 June 2026, measured in degrees Celsius. Current crowd-implied probability sits at 0% for any specific range, suggesting traders view the outcome as either highly uncertain or currently mispriced relative to historical norms. For a power-user approaching this programmatically, the settlement relies on Wunderground’s daily maximum for ZSPD, meaning any bot must fetch the precise timestamped peak rather than an average.

Historical data frames how to interpret this probability. June marks the start of Shanghai’s hot season, lasting until mid-September, with average daily highs exceeding 80°F (27°C) and summer peaks regularly surpassing 30°C (86°F) [3][5]. Daily highs in June typically climb from 77°F to 83°F, rarely exceeding 92°F (33°C) [7]. The 2026 forecast predicts highs ranging from 77°F to 96°F (25°C to 36°C), indicating that temperatures above 30°C are plausible [4]. A 0% probability may reflect a lack of liquidity rather than a genuine belief that extreme heat is impossible.

Traders should monitor real-time weather schedules and precipitation forecasts, as heavy rain can suppress peak temperatures. BBC Weather currently forecasts heavy rain for Hongqiao Airport on 23 June, with highs capped at 24°C (76°F), a pattern that often extends to Pudong [2]. Programmatic strategies must account for this dependency: conditional orders should trigger only if rain intensity drops below a threshold. Recent updates from the National Weather Service show light showers and cloud cover at Pudong early on 23 June, with temperatures hovering near 23–24°C [1]. Any shift in cloud cover or wind direction could rapidly alter the daily maximum, making live data feeds essential for accurate positioning.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

We track Highest temperature in Shanghai on June 23? on the five venues with material liquidity for prediction markets. Live odds come from the Polymarket Polygon order book — the only source that ships real-time data under an open licence. For Kalshi, Betfair and Manifold we list platform attributes (fee, KYC, settlement, payment) instead of fabricated odds, because their APIs use non-comparable contract definitions.

Resolution & payout

Settlement runs on-chain. Polymarket's contract logic separates YES and NO shares as conditional tokens; at resolution the winning share lifts to $1.00 and the losing one to $0. The outcome input comes from the UMA Optimistic Oracle, which secures against bad resolution with a bond + dispute window.

Once finalised, the smart contract pays USDC to the holders' wallets within minutes — no withdrawal fees beyond Polygon network gas. Kalshi settles in USD via CFTC clearance, Betfair in account currency net of commission, Manifold in play-money mana with no cash-out.

FAQ

Where can I trade this market with the lowest fees?

On Polymarket Bot 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.

Is this market available outside the US?

Polymarket Bot UK is available in most jurisdictions where Polymarket isn't directly accessible. Polymarket itself is geo-blocked in the US/UK/EU. Always check local regulations.

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 Polymarket Bot UK?

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

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.