Highest temperature in Shenzhen on July 21?

Platform comparison

Market context

Shenzhen is experiencing its peak summer heat today, with overcast skies and humidity pushing the RealFeel temperature to 95°F despite an actual reading of 84°F at Bao'an International Airport[1]. The market’s 0% YES probability reflects the overwhelming likelihood that the highest temperature on 21 July 2026 will fall within the standard summer range rather than an extreme outlier, as July is historically the hottest month but moderated by frequent rainfall and typhoon activity[3].

Historical data for Shenzhen in July shows average highs of 32°C (90°F) with 17 rainy days and 340mm of precipitation, making extreme temperature spikes less common than in dry continental climates[3]. Comparable cases from recent years indicate that while daytime temperatures regularly reach 32°C, the subtropical high and typhoon season typically prevent sustained records above 35°C, framing the current probability as a rational assessment of seasonal norms rather than a dismissal of heat entirely.

Traders should monitor the 90% precipitation forecast for the coming week, as heavy rain and cloud cover will likely suppress peak temperatures below extreme thresholds[2]. The primary catalyst is the arrival of any typhoon systems or sustained subtropical high-pressure shifts, which Wunderground data will capture for settlement; no political debates or campaign disclosures influence this weather-specific resolution, though the market leans on the immediate meteorological forecast of near-total cloud cover and high humidity[1][2].

Sources: 1 · 2 · 3

Methodology

This page tracks Highest temperature in Shenzhen on July 21? across four political prediction venues. Live odds come from the Polymarket order book (the deepest political prediction-market book). Kalshi is the CFTC-regulated US alternative, Betfair the established UK sports-exchange with politics markets, Manifold the open play-money variant. For users geo-blocked from Polymarket directly, brokers like Trump Prediction provide a 0%-fee route into the same order book.

Resolution & payout

Political markets typically settle on official candidate or agency confirmation. Polymarket uses UMA Optimistic Oracle: a proposer posts the outcome with a bond, the two-hour window opens, then the smart contract pays USDC.

Kalshi settles USD via CFTC clearinghouse, with clearly defined resolution sources (e.g. AP race calls for elections). Betfair settles after the official outcome is registered with the league or agency. Manifold is play-money.

FAQ

How accurate are political prediction markets?

Historically more accurate than polls. Polymarket's Brier score on US 2024 elections was ~0.11 — better than 538 (~0.14) and every mainstream poll. Markets aggregate information with real skin in the game.

Which platform has the deepest political liquidity?

Polymarket — by far. US 2024 presidential volume was ~$3.5B vs Kalshi (~$200M) and Betfair (~$120M). Where Polymarket is geo-blocked, brokers like Trump Prediction route into the same order book at 0% fees.

How fast do political markets react to news?

High-liquidity markets move within seconds to minutes. A Trump tweet on the economy can shift the "Trump 2024" market 2-5 points before mainstream media has written anything.

Why do Polymarket and Kalshi differ on elections?

Kalshi must follow CFTC compliance — strict definitions, clear resolution sources, US citizens only with KYC. Polymarket operates globally without CFTC oversight — deeper liquidity, but also higher regulatory risk.

Which political events have the biggest volume?

US Presidential election, party nominations (DNC/RNC), Senate majorities, individual state outcomes (Pennsylvania, Michigan, Wisconsin), and major European elections. Peak markets reach $50-500M per event.