Highest temperature in Houston on July 23?

Platform comparison

Market context

Houston has already started the day warm, and the key change in the last 24–48 hours is that the local pattern has been leaning hot rather than mixed or storm-driven, with early readings around **91°F** at Hobby Airport on the current day and no rain reported in the latest update.[1] For a market settled on the day’s *highest* temperature at William P. Hobby Airport, that matters because once morning temperatures begin near the upper 80s or low 90s, the ceiling for the rest of the day is often set by whether cloud cover, sea-breeze influence, or afternoon convection can cap further warming.[1]

The crowd-implied **0% YES** looks aggressive if read literally as an expectation of no qualifying high at all, because Houston’s July climate routinely reaches the 90s and recent comparable summer observations have included highs around **95°F** even with humidity and light winds.[3] Time-and-date historical weather pages for Hobby Airport also show that July conditions commonly remain warm through the afternoon, which is consistent with a market that should be priced around the likelihood of a hot peak rather than a cold outlier.[2] In practice, the most relevant comparison is whether today behaves like a standard Gulf Coast summer day or one interrupted by showers and cloud build-up; the latter can trim the maximum, but the former usually leaves the airport station well into the 90s.[1][2]

Traders should watch the midday forecast updates, any convective rain chances, and whether the sea breeze pushes cloud cover inland before the afternoon heating peak. At Hobby Airport, the final settlement hinges on the highest temperature recorded on the station page, so small changes in storm timing or cloud intensity can matter more than the morning start. The latest station-style update already shows warmth without precipitation, which keeps the main catalyst on whether the afternoon stays clear enough for another few degrees of warming.[1]

Sources: 1 · 2 · 3

Methodology

This page reviews Highest temperature in Houston on July 23? across five venues. The live probability is the Polymarket mid-price, sourced directly from the on-chain Polygon order book; the comparison columns benchmark each venue on fee structure, KYC, settlement currency and payment rails. Every CTA routes to Prediction Today, which mirrors the Polymarket order book at 0% fees.

Resolution & payout

Settlement runs on-chain. Polymarket's contract logic separates YES and NO shares as conditional tokens; at resolution the winning share lifts to $1.00 and the losing one to $0. The outcome input comes from the UMA Optimistic Oracle, which secures against bad resolution with a bond + dispute window.

Once finalised, the smart contract pays USDC to the holders' wallets within minutes — no withdrawal fees beyond Polygon network gas. Kalshi settles in USD via CFTC clearance, Betfair in account currency net of commission, Manifold in play-money mana with no cash-out.

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.

How fast are USDC deposits?

Polygon credits deposits after 12 confirmations — usually under 30 seconds. Withdrawals follow the same path and land back in your wallet within minutes.