Latest National Weather Service guidance forecasts a Denver high near 82°F on August 15 amid increasing afternoon cloud cover and showers with thunderstorms likely after 3 p.m., which limits solar heating and caps the daily maximum. This convective regime, common in late-summer Front Range patterns, creates tight uncertainty between the 80–81°F and 82–83°F bins that dominate trader sentiment at 34% and 41.5% implied probability. Ensemble model spreads and storm timing—earlier or more widespread activity could shave a degree or two while delayed development might allow brief clearing and a push toward 83–84°F—explain the narrow clustering. Official observations at Denver International Airport will resolve the market based on the calendar-day maximum.