Highest temperature in Shanghai on May 23?

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Market context

Shanghai's weather on 23 May 2026 will determine the highest temperature recorded at Pudong International Airport Station that day. The settlement window closes at midday UTC, capturing the full calendar day's temperature range as reported by Weather Underground's historical records for that location.

Late May sits within Shanghai's late spring period, when daily highs typically range between 28–32°C, though extremes can push toward 35°C during heat waves. Historical data from previous May 23rds shows considerable year-to-year variation; the city experiences occasional warm spells driven by subtropical air masses, but also cooler days when northerly flows persist. The current crowd-implied probability of 0% suggests either extreme confidence in a specific temperature band or insufficient liquidity across the full range of possible outcomes. Given Shanghai's predictable seasonal patterns and the specificity of a single-day measurement, the consensus likely reflects traders positioning heavily toward mid-range temperatures rather than genuine certainty about edge cases.

Traders should monitor late-April and early-May weather patterns across East Asia, as these establish the atmospheric setup for late May. The East Asian summer monsoon's onset timing—typically occurring in May—will influence whether subtropical warmth dominates or cooler systems persist. China's meteorological services issue extended forecasts roughly two weeks ahead; these become increasingly reliable in the final week before 23 May. Any unusual blocking patterns or tropical cyclone activity in the Western Pacific could shift regional temperatures materially, though such systems remain difficult to predict beyond ten days.

Methodology

This page reviews Highest temperature in Shanghai on May 23? across five venues. We show live odds for Polymarket-based markets (sourced from the Polygon order book); for other venues we list platform attributes, since the comparable contracts are not exposed via a public API on every venue. Every CTA points at PolyGram — the application we operate, where you trade directly against the Polymarket order book at 0% fees.

Resolution & payout

Polymarket-based markets settle through the UMA Optimistic Oracle on Polygon. A proposer submits the outcome, a two-hour challenge window opens, and unchallenged proposals finalise the resolution. Payouts settle automatically in USDC the moment the result is final — no bookmaker, no delay.

Kalshi-based markets settle in USD via the CFTC-regulated clearinghouse. Betfair Exchange settles in GBP/EUR net of commission. Manifold is play-money and does not pay out real funds.

FAQ

Where can I trade this market with the lowest fees?

On PolyGram, 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.

What does it cost to trade on PolyGram?

Zero. PolyGram 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?

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Do I need to KYC for this market?

Not under $1,500 of lifetime trading volume. Above that threshold, PolyGram 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.