**Forecast models from the National Weather Service and other sources indicate an overnight low in the low-to-mid 60s°F for Denver on August 30, 2026, with ranges cited between roughly 57–64°F across guidance.** This positions the 59°F-or-below bin as a plausible but not dominant outcome (market-implied 47%), while the clustered 60–65°F ranges reflect the tight consensus around typical late-summer radiative cooling at Denver’s ~5,280 ft elevation. Clear to partly cloudy skies and light winds overnight allow efficient heat loss after daytime highs near 85–90°F, producing the expected diurnal swing of 20–30°F. No strong cold advection or unusual moisture is present to push temperatures markedly lower or higher than seasonal norms. Historical August 30 lows average near 55°F, but current conditions track slightly warmer, consistent with the elevated forecast values. Traders appear to price residual uncertainty in exact minimum timing and micro-scale variations (e.g., urban heat island effects or brief clearing), keeping meaningful probability on the 59°F threshold and adjacent bins while discounting warmer outliers. The market will resolve on official observations once the full 24-hour period ends.