Highest temperature in Shenzhen on July 8?

Platform comparison

Market context

The underlying event is the peak heat recorded at Shenzhen Bao'an International Airport on 8 July 2026, measured in degrees Celsius by Wunderground. Current crowd-implied probability sits at 0% for a high-temperature outcome, reflecting today’s overcast skies and morning thunderstorms that have suppressed temperatures to a high of 85°F (approximately 29.4°C) [1]. This aligns with historical patterns where July, despite being the hottest month with an average high of 89°F (31.7°C), frequently experiences rain and cloud cover that prevent extreme peaks [4]. Programmatically, a trader would model this by weighting the 60% chance of rain against the seasonal average, noting that the current 0% probability likely assumes the cloud cover will persist, making a high-temperature resolution improbable unless a sudden heatwave breaks the pattern [1][2].

Traders should monitor real-time weather updates for any shift from overcast to clear skies, as sudden solar exposure could rapidly elevate temperatures beyond the current 29.4°C threshold. The primary catalyst is the absence of a confirmed heatwave announcement; without such a forecast, the market’s 0% probability remains grounded in the prevailing meteorological data [1]. Dependencies include the Wunderground resolution source, which aggregates data for all times on the day, meaning even a brief afternoon spike could alter the outcome [3]. Recent historical data from July 2025 shows similar variability, where rain events consistently capped maximum temperatures, reinforcing the need to watch for any unexpected drop in cloud cover or rise in wind speed that might clear the sky [7]. A power-user would set conditional orders triggered by a 10% drop in rain probability or a 2°C rise in the hourly maximum, ensuring exposure only if the weather shifts decisively toward heat.

Sources: 1 · 2 · 3 · 4 · 5

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 Kalshi Fees, which mirrors the Polymarket order book directly.

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'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.

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.

Do I need to KYC for this market?

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