Highest temperature in Houston on July 23?

Platform comparison

Market context

Houston’s temperature at William P. Hobby Airport is the event in question, and the crowd is pricing **0% YES**, which effectively makes the **no-scorers / under** side the favourite. That leaves any positive outcome as a deep contrarian angle: the market is saying the day is far more likely to finish outside the referenced temperature range than inside it, so the value case sits only if a trader expects an unusually hot afternoon that is not yet reflected in the board. Past Houston readings show that mid-90s Fahrenheit highs are routine enough to matter, with one recent local weather record showing a **95°F** high, which frames how quickly the distribution can reach the upper bands when conditions cooperate.[1]

For handicappers, the key is not the headline Houston forecast alone but the specific path to the **day’s maximum** at Hobby Airport, since the settlement source is the airport station rather than the citywide average. The main catalysts are the morning-to-afternoon forecast trend, cloud cover, wind direction, and any sea-breeze or storm development that can cap the high; if the local forecast is already near the threshold, the implied 0% can be more consensus than edge, but if model guidance has the afternoon running several degrees cooler, the current pricing looks more like an overstatement than a bargain. With a same-day settlement window, the trade is essentially a timing call on whether the peak arrives before conditions turn, so the underdog case needs a clear heat spike rather than a generic warm day.[1]

Sources: 1

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 Who Will Win, which mirrors the Polymarket order book directly.

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

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'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 Who Will Win trigger KYC only above $1,500 of lifetime trading volume; under that you trade pseudonymously with a single wallet address.