Highest temperature in Shanghai on June 30?

Platform comparison

Market context

The underlying event is the peak daily temperature recorded at Shanghai Pudong International Airport on 30 June 2026, which will determine whether the market settles as a "YES" for the higher temperature range. Historical data shows June highs in Shanghai typically climb from 78°F to 85°F, rarely exceeding 93°F, with the hot season officially beginning mid-June and lasting until mid-September[1][5]. Recent records indicate a spike to 88.8°F on 28 June 2026, suggesting the current 33% crowd-implied probability for the higher range is plausible given the recent upward trend[2].

Traders should monitor real-time weather updates from Wunderground and any sudden shifts in humidity or cloud cover that could suppress peak temperatures, as these are the primary dependencies for settlement[4]. While no scheduled political debates or campaign-finance disclosures directly influence weather, any unexpected atmospheric declarations from regional meteorological agencies could act as a catalyst for price movement. The market is leaning on the immediate thermal trajectory observed over the past three days, with the 28 June peak serving as the most relevant benchmark for current expectations[2][6].

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page tracks Highest temperature in Shanghai on June 30? 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 Trump Prediction 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 Trump Prediction route into the same order book at 0% fees.

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.

Which political events have the biggest volume?

US Presidential election, party nominations (DNC/RNC), Senate majorities, individual state outcomes (Pennsylvania, Michigan, Wisconsin), and major European elections. Peak markets reach $50-500M per event.