Highest temperature in Houston on July 10?

Platform comparison

Market context

Houston will face its peak July heat on 10 July 2026, with the William P. Hobby Airport station recording the day’s highest temperature in degrees Fahrenheit. Historical data shows July 10, 2022, reached 104°F at the same location, while the average July high in Houston is 93°F, often climbing to 96°F under clear skies [2][4]. The current 0% implied probability for any specific range on Polymarket suggests the crowd expects resolution outside the listed brackets, a divergence from Kalshi’s decimal odds format which would express this as 0.00 rather than a binary probability. Kalshi and Betfair also impose stricter KYC thresholds than Polymarket, limiting access for international traders who might otherwise capitalise on such weather anomalies.

Traders should monitor the National Weather Service’s heat dome forecasts and scattered thunderstorm schedules for Friday, 10 July, as rain could suppress temperatures below 90°F [7][10]. Recent reports indicate Houston has not yet hit 100°F in 2026, with this week’s highs staying shy of the century mark despite above-normal warmth [7]. Smarkets’ lower fee structure compared to Polymarket’s 2% maker fee could attract volume if the market revises its probability as forecasts tighten. The settlement hinges on Wunderground’s recorded high for KHOU, meaning any discrepancy between forecast models and actual station data will drive price swings. Platform differences in resolution timing—Polymarket’s 12:00Z cutoff versus Robinhood’s extended trading window—also affect how traders position before the event concludes.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

We read Highest temperature in Houston on July 10? from four platform perspectives: Polymarket (on-chain CLOB), Kalshi (CFTC-regulated exchange), Betfair Exchange (sports book exchange), Smarkets (peer-to-peer betting exchange). Polymarket's live mid is the canonical probability; the side-by-side columns benchmark fees, KYC, settlement currency and deposit rails so you can choose the venue that fits your jurisdiction and trade size.

Resolution & payout

Polymarket settles via UMA Optimistic Oracle on Polygon. A proposer posts the outcome with a bond, the two-hour window runs, then the smart contract pays USDC.

Kalshi settles USD through the CFTC-regulated clearinghouse — the cleanest variant, with heavier KYC. Betfair Exchange settles in account currency (GBP/EUR), net of 2-5% commission. Smarkets follows the same model as Betfair with a lower default 2% commission.

FAQ

Polymarket vs Kalshi — which is better?

Depends on your location. Kalshi is CFTC-regulated, US-only with full KYC. Polymarket is global, on-chain, no KYC up to $1,500. Polymarket has ~10x higher liquidity but higher regulatory risk.

What does Polymarket cost vs Kalshi?

Polymarket: 0% fees, only Polygon network costs (~$0.01/trade). Kalshi: up to 7% per trade plus spread. For high-frequency traders, Polymarket is dramatically cheaper.

Is Betfair a Polymarket alternative?

Only partially. Betfair Exchange is UK-focused with a sports-betting emphasis; they have politics markets but with thinner liquidity than Polymarket. Settlement in GBP/EUR, 2-5% commission on winnings.

Which platform is accessible globally?

Polymarket is geo-blocked in the US/UK/EU. Kalshi is US-only. Betfair and Smarkets are UK-restricted. Polymarket Alternative has a different geo footprint and routes to Polymarket's order book at 0% fees.

Are all these platforms regulated?

No. Kalshi is CFTC-regulated (US). Betfair and Smarkets are UK Gambling Commission licensed. Polymarket operates without explicit regulation — a different risk profile than a regulated sportsbook.