Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Sport Prediction) Pick polygram.ink (preferred broker) |
44% | 56% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Live odds → |
Polymarket (direct) polymarket.com |
44% | 56% | 0% | Geo-blocked in US/UK/EU | USDC, on-chain | Live odds → |
Kalshi kalshi.com |
— | — | Up to 7% per trade | US-only, KYC required | USD | Live odds → |
Betfair Exchange betfair.com |
— | — | 2-5% commission | Full KYC from first trade | GBP / EUR | Live odds → |
Manifold Markets manifold.markets |
— | — | Play-money (mana) | None — play-money | Mana (no cash-out) | Live odds → |
Outcome probabilities
Current market-implied probability for each outcome, from the live order book.
| Outcome | Probability |
|---|---|
| 90-91°F | 44% |
| 92-93°F | 31% |
| 94-95°F | 18% |
| 96-97°F | 7% |
| 98-99°F | 1% |
| 87°F or below | 0% |
| 88-89°F | 0% |
| 100-101°F | 0% |
| 102-103°F | 0% |
| 104-105°F | 0% |
| 106°F or higher | 0% |
Market context
Houston’s late-July heat usually sits in the mid-90s Fahrenheit, with July daytime highs in the low 30s Celsius and warm nights that offer little relief. Recent local history is consistent with that pattern: one Houston past-weather report shows a **95°F** high alongside very humid conditions, which is the sort of outcome that anchors expectations for a “highest temperature” market tied to the city’s airport readings.[1][2]
The current **0% YES** price is only easy to read if the market’s temperature bands are very high, because ordinary Houston summer heat is common rather than exceptional. The main reference point for traders is the actual maximum at William P. Hobby Airport, so the question is not whether it gets hot, but whether it clears the relevant band before the reporting window closes. July climatology suggests a high-90s result is plausible, but the distribution is still broad enough that a single cloudy or storm-affected day can leave the top reading several degrees below expectation.[2]
For catalysts, watch the official daily forecast updates, especially any change in afternoon thunderstorm coverage, rain-cooled outflow, or persistent cloud. Houston’s hottest reading can be set early if the morning is already very warm and humid, or capped if convection builds quickly and limits solar heating. If the airport forecast leans into widespread storms or reduced sunshine, the ceiling on the day’s maximum falls sharply; if conditions stay mostly clear and winds remain light, the market becomes much more sensitive to a mid-to-upper 90s print.[1][2]
Methodology
Sports-specific comparison page for Highest temperature in Houston on July 23?. Polymarket's live quote (Polygon order book) plus platform attributes for the three reference venues. Sports markets reward liquidity — Polymarket and Betfair are materially deeper than Kalshi or Manifold.
Resolution & payout
Sports markets typically settle on official final-whistle plus league confirmation. Polymarket uses UMA Optimistic Oracle with a source URL per contract — usually official league data feeds or ESPN/Soccerway. Two-hour dispute window, then smart-contract payout in USDC.
FAQ
- Are prediction markets better than sports betting?
- Prediction markets tend toward tighter odds than bookmakers because they use peer-to-peer exchange rather than bookmaker margin. On major matches, Polymarket quotes typically sit 2-5% closer to the true probability model than bet365 or DraftKings.
- When do sports markets resolve?
- Typically within hours of the official final whistle. Polymarket uses UMA Optimistic Oracle with source URLs pointing at official league data feeds — e.g. the Premier League for EPL markets, UEFA for Champions League, FIFA for World Cup.
- What are live sports odds on Polymarket?
- Some top-tier matches stay open during play — you can trade the half-time probability in the 70th minute. Polymarket mid-prices update second-by-second; any frontend mirroring the order book shows the same movement.
- What's the difference between match odds and outright odds?
- Match odds cover a single game ("Bayern beats BVB"). Outright odds are long-term aggregates ("Bayern wins the league"). Outright markets have deeper liquidity; match markets have faster resolution.
- Can I import form data and lineups?
- This page shows the live Polymarket quote as an implied probability. Form data and lineups must be researched separately via sports data providers (e.g. Soccerway, ESPN, FBref) — we surface the market probability, not the sport analysis.
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