Pronóstico: Highest temperature in Shanghai on August 20?

Platform comparison

Market context

Shanghai's highest temperature on 20 August 2026 will be measured at Pudong International Airport Station and resolved against the Daily Observations table on Weather Underground, with settlement occurring at 12:00 UTC that day. The current Polymarket pricing reflects 0% implied probability across all temperature ranges, suggesting either extreme uncertainty or insufficient liquidity in the conditional token pairs trading on Polygon. Traders holding YES positions would require USDC deposits converted to conditional tokens representing specific temperature brackets—a structure that demands clarity on which range actually settles TRUE once the observation data publishes.

August represents Shanghai's hottest month climatologically, with daily highs typically ranging between 32–35°C, though extreme heat events pushing toward 37–40°C occur roughly once per decade. Historical data from 2013, 2017, and 2022 saw August peaks exceed 37°C during regional heat domes, whilst cooler Augusts have bottomed near 30°C. The 0% crowd probability suggests either the market has attracted no trading activity or participants are pricing in genuine ambiguity about which temperature band will materialise—a gap that widens considerably when settlement depends on a specific data source rather than official meteorological summaries.

The China Meteorological Administration typically issues seasonal forecasts by late July, with updates tracking developing pressure systems and potential typhoon activity in the Western Pacific. El Niño or La Niña conditions influence August temperatures across East Asia; current oceanic indices will become clearer by June 2026. Traders should monitor Shanghai's actual temperatures through July as a leading indicator of atmospheric patterns, since persistent high-pressure systems in early August often sustain elevated readings into the 20th.

Methodology

This page is a comparison snapshot: one live quote, four reference venues with their key attributes, and a single execution path — every trade button routes to Polymarket Qué Es, which mirrors the Polymarket order book directly.

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?

Polymarket is geo-blocked in the US/UK/EU. The easiest 0%-fee broker into the same order book is Polymarket Qué Es. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

What does Polymarket cost to trade?

Polymarket itself charges 0% — the only cost is the Polygon network fee, typically under $0.01 per transaction. Off-chain venues like Kalshi or Betfair charge 2-7% commission.

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.

Do I need to KYC for this market?

On Polymarket directly, no — it's wallet-based. Intermediary brokers like Polymarket Qué Es trigger KYC only above $1,500 of lifetime trading volume; under that you trade pseudonymously with a single wallet address.

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.