Highest temperature in Shenzhen on July 19?

Platform comparison

Market context

On 19 July 2026, Shenzhen will experience peak summer heat, and traders are currently pricing zero probability that the daily maximum temperature at Bao'an International Airport Station will fall into the highest available range bracket. This represents an extreme consensus view, suggesting either the upper temperature threshold is set substantially above historical norms or the market has collapsed into a technical corner. The settlement mechanism relies on Wunderground's historical data feed for that specific station, which records hourly observations throughout the day—the highest reading across all 24 hours determines resolution.

Shenzhen's July climate is remarkably consistent. Over the past two decades, daily maximum temperatures in mid-July have ranged between 32–35°C, with occasional spikes to 36°C during particularly intense heat waves. The 2022 summer saw sustained temperatures above 35°C for extended periods, whilst 2020 peaked at 37.2°C on 16 July. The current 0% probability implies the market's highest bracket sits above these historical extremes, or traders are avoiding the contract entirely due to liquidity constraints on Polygon's USDC settlement layer.

Traders monitoring this contract should track the East Asian summer monsoon patterns and any tropical cyclone activity in the South China Sea during early-to-mid July 2026. Typhoons approaching the region can suppress daytime temperatures significantly, whilst stalled high-pressure systems intensify heat. China's meteorological authority typically issues heat alerts 3–5 days in advance; such announcements would provide concrete directional signals. The settlement window closes at 12:00 UTC on 19 July, meaning traders must account for any timezone conversion between Shenzhen local time and the UTC cutoff when evaluating late-day temperature movements.

Methodology

We track Highest temperature in Shenzhen on July 19? across the five venues with material prediction-market liquidity. The probability shown is the live Polymarket mid; the comparison rows summarise how each venue treats the underlying contract — fees, KYC thresholds, settlement currency, deposit options. The highlighted row marks the cheapest route into Polymarket's order book.

Resolution & payout

At resolution the UMA oracle takes over: a proposer posts the outcome with a bond, any token holder can dispute within two hours. Without dispute the result is accepted and the smart contract distributes USDC instantly.

On Kalshi (CFTC-regulated) resolution runs through their in-house clearing engine in USD. Betfair Exchange settles after match end in the account's local currency. Manifold pays no cash — only its in-platform "mana" currency.

FAQ

How does resolution work?

Through the UMA Optimistic Oracle on Polygon: a proposer submits the outcome, a two-hour challenge window opens, and USDC payouts settle automatically once the result is final.

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 PolyGram 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.