Highest temperature in Houston on July 23?

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Market context

The relevant event is the maximum temperature recorded at William P. Hobby Airport in Houston on 23 July, with settlement tied to the highest daily reading rather than a forecast at a specific hour. Houston in July typically runs hot and humid, with average temperatures around 77°F to 96°F and frequent rain days, so outcomes in the mid-90s are normal rather than exceptional[2]. A recent Houston past-weather snapshot showed a 95°F high alongside very high humidity, which is consistent with the city’s usual summer profile[1].

A 0% crowd-implied probability suggests the market is pricing the contract as effectively unresolved or mispriced relative to the calendar, not that a cool day is impossible. For comparison, a 95°F high sits within Houston’s ordinary July band[1][2], so traders should focus less on the headline number and more on whether the day’s heat builds after morning cloud cover clears. The on-chain angle is straightforward: the contract settles in USDC, so price discovery is likely to be driven by weather expectations rather than BTC or ETH direction unless broader crypto liquidity conditions affect risk appetite. Recent spot/funding dislocations in major crypto pairs can still matter at the margin for market-making depth, but the fundamental driver remains the local temperature print.

Catalysts to watch are the day’s Houston forecast updates, any morning cloud or rain that suppresses the daytime high, and the timing of the station’s peak reading before the settlement window closes. Because the market resolves from Wunderground’s William P. Hobby Airport history page, traders care about the final logged high, not just the forecast maximum. If showers form early, the high may stall in the low- to mid-90s; if skies clear quickly, the station can still push into the upper 90s, which is still consistent with Houston’s July climatology[1][2].

Sources: 1 · 2

Methodology

This page reads Highest temperature in Houston on July 23? on-chain. Polymarket's quote comes directly from the Polygon order book — the only comparable venue with on-chain settlement. Kalshi (USD, off-chain), Betfair (GBP/EUR, off-chain) and Manifold (play-money) are listed alongside for venue context. Every CTA routes to BTC Prediction, which mirrors the Polymarket order book directly.

Resolution & payout

Settlement is on-chain via UMA Optimistic Oracle. A proposer posts the outcome with a bond, a two-hour dispute window opens, then the smart contract lifts winning conditional tokens to 1 USDC and sends payments to holders' wallets automatically. No withdrawal fees beyond Polygon gas.

Off-chain venues (Kalshi, Betfair, Smarkets) settle in local fiat through bank-side clearing — faster than SWIFT, slower than on-chain. Manifold pays no real cash.

FAQ

Why USDC and not ETH or USDT?

USDC is the Polygon standard — audited reserves (Circle, monthly attestation), deepest order book, low gas costs. ETH volatility would distort probability quotes; USDT has thinner Polygon liquidity than USDC.

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