**Cloud cover and widespread showers or thunderstorms expected on September 2 are the dominant factors capping Houston’s daily high well below the late-summer climatological average of ~91–92 °F.** Official forecasts from the National Weather Service and private providers consistently indicate a 60–70 % chance of precipitation, with morning showers transitioning to likely afternoon thunderstorms. These conditions limit incoming solar radiation and promote evaporative cooling, keeping the maximum temperature in the mid-to-upper 80s °F range. The tight clustering of market-implied probabilities around 84–89 °F reflects genuine forecast uncertainty in the precise timing, coverage, and intensity of convection. Stronger or earlier storms favor the 84–85 °F or 86–87 °F bins, while any late-day clearing or weaker rainfall allows brief periods of stronger insolation that could push readings into the 88–89 °F range. Higher outcomes (90 °F+) require substantially drier and sunnier conditions than current model consensus supports, while sub-84 °F readings would need unusually persistent heavy rain or an unseasonably strong cold pool—both low-probability scenarios given the warm, humid air mass in place. Traders are therefore weighting the most recent high-resolution model guidance and short-term observational trends (satellite-derived cloud trends, radar trends, and surface observations) that will refine storm coverage through the morning of September 2.