Highest temperature in Shanghai on June 23?

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Market context

The crowd-implied 0% probability for a temperature spike today at Shanghai Pudong International Airport reflects a sudden shift in the last 24 hours: a deepening layer of cloud cover and incoming moisture from the plum rain season have suppressed solar heating, pushing the day’s outlook firmly toward the cooler, wetter end of the June spectrum rather than the dry, scorching highs traders might expect.

Historically, late June in Shanghai rarely breaches 35°C unless skies remain clear for days; instead, the month’s average high sits near 27°C, with frequent rainfall keeping peaks lower, as seen in 2025 when a 38°C spike occurred only on June 27 after a prolonged dry spell, whereas the 22nd and 23rd of June typically hover around 24–29°C due to the region’s damp, humid conditions [1][3][6].

Traders should monitor the National Weather Service’s hourly updates for ZSPD and any sudden shifts in the plum rain front, as a break in cloud cover could trigger a rapid temperature rise, but current forecasts from AccuWeather suggest highs will stay between 77° and 96°F with overnight lows of 68°–79°F, making a 35°C+ event unlikely without a clear-sky catalyst [2][4]. The key dependency is whether the rain system stalls or clears; if it lingers, temperatures will remain subdued, but a sudden clearance could alter the day’s trajectory within hours.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

Methodologically we separate two layers: the live probability (Polymarket mid-price) and the platform attributes (fee, KYC, settlement currency, payment rails). The odds column is filled only where we have clean data — that avoids the made-up numbers that get a network demoted when search engines cross-check against the source venue.

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.

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FAQ

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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.