Highest temperature in Shenzhen on August 3?

Platform comparison

Market context

Shenzhen’s peak temperature for the day is a very localised weather print: the settlement source is the Shenzhen Bao’an International Airport station, and the relevant number is the highest observed reading before the day’s last datapoint is published. Early-August Shenzhen is typically hot and humid, with climatological highs around 31–34°C and a meaningful chance that cloud, showers or thunderstorms shave a degree or two off the afternoon maximum.[11][17][18][20]

The current 0% YES pricing is a useful cue for a bot builder, but not a signal that the outcome is impossible; it more likely reflects either stale order book depth or a mismatch between the market bucket and the live forecast. Comparable forecasts for Shenzhen on 3 August sit in a fairly tight warm band, with model guidance and public weather pages pointing to a high near 33–34°C and overnight values in the high 20s, which would normally leave the market clustering around the upper 20s to low 30s Celsius rather than an extreme tail.[2][5][9][11] For a programmatic approach, the practical task is to map the live temperature forecast to the market’s discrete ranges and watch whether the hourly peak arrives before the 12:00 UTC settlement window closes.[3][7]

The main catalysts are simple but time-sensitive: convective showers, cloud cover, and wind shifts along the South China coast can suppress the midday maximum, while clearer breaks can let temperatures briefly spike. At the moment, forecast pages for Shenzhen indicate warm, humid conditions with some shower risk and generally low winds, so a trader using automated triggers would watch successive forecast refreshes, airport observations, and any typhoon-related changes in South China Sea steering flow rather than headline daily averages.[6][8][14][17][20]

Sources: 1 · 2 · 3 · 4 · 5

Methodology

We track Highest temperature in Shenzhen on August 3? 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

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 Bot UK. 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.

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 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.