Highest temperature in Shanghai on July 3?

Platform comparison

Market context

The underlying event is the daily peak temperature at Shanghai Pudong International Airport on 3 July 2026, a date historically prone to cooler highs within the month. While July in Shanghai typically sees highs between 26–31°C, with peaks reaching 38°C in 2025, 3 July specifically stands out as the coldest day in the first ten days, averaging just 24.3°C [6]. This seasonal anomaly explains the current 0% crowd-implied probability for the highest temperature exceeding the market threshold; historical data suggests the day is more likely to remain below 28°C, making extreme heat unlikely [2].

Traders should monitor real-time weather forecasts and any sudden shifts in atmospheric pressure, as these are the primary catalysts for temperature deviations. Recent forecasts indicate a maximum of 30°C for the morning, with moderate rain expected, which would further suppress peak temperatures [9]. There are no scheduled political debates or campaign-finance disclosures influencing this weather event, so the market leans entirely on meteorological data from Wunderground [4]. The key dependency is the absence of a heatwave, as even a brief surge could alter the outcome, though current trends favour cooler, muggy conditions typical of early July [2].

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page tracks Highest temperature in Shanghai on July 3? 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. For users geo-blocked from Polymarket directly, brokers like Election Predictions UK provide a 0%-fee route into the same order book.

Resolution & payout

For political markets the resolution source is decisive. Polymarket defines a concrete source per contract (e.g. AP, Reuters, official electoral commission) and uses the UMA Optimistic Oracle as the on-chain dispute mechanism. With a clearly defined outcome the USDC payout lands within minutes of the final confirmation.

FAQ

How accurate are political prediction markets?

Historically more accurate than polls. Polymarket's Brier score on US 2024 elections was ~0.11 — better than 538 (~0.14) and every mainstream poll. Markets aggregate information with real skin in the game.

What resolution source is used for elections?

Polymarket defines the source per contract — usually Associated Press (AP Race Call), Reuters or the official electoral commission. The source is stated in contract details before the market opens.

Which platform has the deepest political liquidity?

Polymarket — by far. US 2024 presidential volume was ~$3.5B vs Kalshi (~$200M) and Betfair (~$120M). Where Polymarket is geo-blocked, brokers like Election Predictions UK route into the same order book at 0% fees.

How fast do political markets react to news?

High-liquidity markets move within seconds to minutes. A Trump tweet on the economy can shift the "Trump 2024" market 2-5 points before mainstream media has written anything.

Are political prediction markets legal in my country?

It varies. They sit in legal gray areas in most jurisdictions. Polymarket is geo-blocked from US/UK/EU; some broker frontends have a different geo footprint. Trade only with capital you can afford to lose, and only if you understand the legal status in your jurisdiction.