Highest temperature in Shenzhen on July 22?

Platform comparison

Market context

Shenzhen Bao’an International Airport is running hot enough that the day’s high will be determined by whether afternoon heating and humidity can push the airport station above the low-30s Celsius range, with current observations already in the mid-30s Celsius equivalent and a RealFeel much higher because of moisture in the air.[1][2][3] The market’s 0% crowd-implied probability of a specific outcome is more a sign of thin attention than a forecast edge, because this contract settles on the single highest airport-station reading for the day rather than on citywide averages or a morning snapshot.[5]

For comparable cases, airport temperature markets in south China tend to be driven by the timing of peak insolation, sea-breeze effects and any afternoon shower or thunderstorm development, so small shifts in cloud cover can move the final reading by a degree or two. The current setup points to a fairly ordinary summer ceiling near the low to mid-30s Celsius, which means the main question is not whether it will be warm, but whether one brief spike before evening observations can set the day’s maximum.[3][4]

The catalyst to watch is the hourly evolution from noon onwards: if sunshine persists and precipitation stays absent, the airport can still edge higher; if cloud build-up or convective rain arrives, the maximum may already be set. Traders should therefore lean on short-horizon weather updates from the airport station and compare them with broader forecast services such as AccuWeather and Meteoblue, which both currently show hot conditions but differ on the likelihood of showers and the exact temperature peak.[1][2][4]

Sources: 1 · 2 · 3 · 4 · 5

Methodology

Political prediction markets differ structurally from sports betting: thinner liquidity, longer settlement windows, higher sensitivity to single news events. This page shows the live Polymarket quote for Highest temperature in Shenzhen on July 22? plus platform attributes for the three reference venues, so you can see at a glance where the deepest market for this question sits.

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.

What resolution source is used for elections?

Polymarket defines the source per contract — usually Associated Press (AP Race Call), Reuters or the official electoral commission. The source is stated in contract details before the market opens.

Can prediction markets influence election outcomes?

Markets reflect expectations rather than create them. Studies show public-facing markets can anchor expectations, but don't influence the underlying outcome. Political markets are information, not advocacy.

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 Election Predictions UK route into the same order book at 0% fees.

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.