Highest temperature in Shenzhen on July 13?

Platform comparison

Market context

Shenzhen is under a heavy rain system today, with 66mm of precipitation expected by Tuesday morning and thunderstorms disrupting the afternoon heat on 13 July [1][2]. This immediate deluge suppresses surface temperatures, making the current 0% crowd-implied probability for extreme highs a rational reflection of the wet conditions rather than a market anomaly. The heat index is currently 38°C despite a measured air temperature of 32°C, but the incoming rain will likely cap the daily maximum near 30–31°C, well below the thresholds that typically trigger YES settlements in this market [3][9].

Historically, July is Shenzhen’s hottest month with an average high of 32°C (89°F), yet the wet season brings frequent cloud cover and precipitation that blunt peak temperatures [5][7]. Comparable cases from recent years show that when heavy rain or thunderstorms occur on 13 July, daily highs rarely exceed 33°C, often staying closer to 30°C due to evaporative cooling and reduced solar radiation [2][8]. The current probability aligns with this pattern, as the forecasted 11mm of rain and cloudy afternoon conditions create a structural barrier to the high-temperature outliers required for a positive resolution.

Traders should monitor the timing of the thunderstorm window between 13:00 and 17:00 local time, as a delay in rainfall could allow a brief temperature spike before the clouds fully engulf the airport [2]. The primary dependency is the persistence of the heavy rain system forecast for Tuesday morning; if the storm clears unexpectedly early, temperatures could rebound toward the seasonal average of 32°C [1][9]. No specific weather announcements are pending beyond standard hourly METAR updates, but the 70% chance of thunderstorms on 14 July suggests the wet pattern will continue, further limiting upside potential for the market [10].

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page reviews Highest temperature in Shenzhen on July 13? across five venues. The live probability is the Polymarket mid-price, sourced directly from the on-chain Polygon order book; the comparison columns benchmark each venue on fee structure, KYC, settlement currency and payment rails. Every CTA routes to Prediction Today, which mirrors the Polymarket order book at 0% fees.

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

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's the difference between YES and NO shares?

A YES share pays $1.00 if the event happens, $0 otherwise. A NO share pays $1.00 if the event doesn't happen. The market price between 0¢ and 100¢ is the implied probability.

Do I need to KYC for this market?

On Polymarket directly, no — it's wallet-based. Intermediary brokers like Prediction Today 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.