Highest temperature in Houston on August 9?

Platform comparison

Market context

Houston is set up for another hot August afternoon, and the market will resolve on the highest reading logged at William P. Hobby Airport rather than the more prominent day-high summary. Early observations around 9 August already showed temperatures in the low 90s Fahrenheit, with the National Weather Service listing Houston Hobby at 91°F and a heat index of 102°F, while Weather Underground showed 92°/79° conditions shortly afterwards.[6][8] AccuWeather’s August outlook for Houston has daily highs mostly in the 90s, which makes a high-teens or low-90s outcome the most natural reference point for traders watching this contract.[2]

The current 0% YES pricing is most plausibly being anchored to the settlement structure rather than an expectation of cold weather. For a date-specific temperature market, the comparable cases are usually straightforward: Houston’s August climate normals sit near the mid-90s, and the record for early August remains well above ordinary daily peaks, so the relevant question is not whether heat occurs, but whether the observed maximum at Hobby ends up inside the market’s chosen range.[11] On that basis, the probability can move quickly if the day’s official station observations begin to print materially above or below the forecast band.[11]

The main catalyst to watch is the stream of station observations from Weather Underground’s Daily Observations table, since that is the binding source for settlement. Traders should focus on whether the afternoon warming trend at KHOU is sustained, because the market is leaning on routine heat rather than any special weather event; the decisive input is the realised maximum at Hobby Airport, not broad city forecasts or the headline high in a summary panel.[6][8][11]

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page tracks Highest temperature in Houston on August 9? 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.

UK Frequently Asked Questions

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.

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 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.

Are UK election prediction markets available from the UK?

Yes. Betfair Exchange and Smarkets offer UKGC-regulated UK election markets (seat counts, party share, constituency results). Polymarket also lists UK election contracts with deeper global liquidity. Betfair winnings are typically tax-free for UK individuals; Polymarket profits are subject to HMRC CGT.