Highest temperature in Houston on August 9?

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Market context

Houston spent the last day sitting in a familiar late-summer pattern: hot, humid and only weakly capped by the chance of afternoon thunderstorms. The National Weather Service office in Houston/Galveston was still calling for another hot summer day in the low-to-mid 90s, with a slight chance of afternoon storms and southerly winds around 5-10 mph, while the latest Hobby Airport observations showed temperatures in the low 90s and a heat index above 100°F.[6][8]

For calibration, August in Houston usually delivers highs around the low-to-mid 90s, so the market’s 0% yes price looks inconsistent with the climatology even before considering day-of volatility.[11][19] Recent forecasts from AccuWeather and other outlets have clustered the 9 August high near 92-93°F, which would sit squarely in the market’s lower temperature bands rather than in an extreme outcome.[2][17] That means the key historical analogue is not a rare cool snap, but a standard Gulf Coast summer day where cloud cover or pop-up rain trims the top end by a degree or two.[6][8]

Traders should watch the timing of any afternoon thunderstorms, because even brief convection can cap the maximum temperature at Hobby Airport before the late-day peak heating window. The settlement source matters here as well: the market resolves off the Weather Underground Daily Observations table for William P. Hobby Airport, not the summary high/low display, so late updates or a revised observation can matter if they land before the cutoff.[18] NWS forecast updates and the station’s observation feed are the practical catalysts to track through the day.[8][18]

Sources: 1 · 2 · 3 · 4 · 5

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