Highest temperature in Shenzhen on July 17?

Platform comparison

Market context

Shenzhen is currently experiencing a sunny, very hot day with a RealFeel of 104°F and 78% humidity, setting the stage for the highest temperature record at Bao'an International Airport on 17 July 2026. The crowd-implied probability for any outcome registering a YES is currently 0%, suggesting the market believes the temperature will fall outside the specific range being traded, or that the market itself is illiquid and mispriced regarding the extreme heat already observed.

Historical data from mid-July in Shenzhen typically sees temperatures hovering between 33°C and 35°C, with the recent July 13 market resolving firmly at 34°C as the near-certain outcome[2]. Given the current 88°F reading at 6 AM and the high humidity, the consensus is likely underestimating the peak, which often occurs in the early afternoon under such clear skies. The 0% probability appears to be a value trap for contrarians, as the atmospheric conditions align with previous years where 34°C or higher was the standard ceiling, making the favourite the higher temperature bands rather than the implied low.

Traders should monitor the hourly Wunderground updates for the Bao'an station as the day progresses, specifically watching for any sudden cloud cover or rain which could cap the peak temperature. The settlement relies entirely on the daily high recorded by this specific source, meaning a single hour of intense solar radiation could swing the result significantly. With the UV index already at 11 and winds at 20 mph, the thermal load is substantial, and the lack of cloud cover suggests the peak will likely exceed the lower thresholds, offering value on the contrarian angle that the market is incorrectly pricing in a cooler day.

Sources: 1 · 2

Methodology

We track Highest temperature in Shenzhen on July 17? 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

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 Who Will Win. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

Is this market available outside the US?

Polymarket itself is geo-blocked in the US/UK/EU. Always check the legal status of prediction markets in your jurisdiction before trading.

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.

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.