Forecast models for Denver on October 13 show notable spread, with National Weather Service guidance indicating a potential high near 78°F amid lingering southerly flow, while other runs project 58–66°F under strengthening northeasterly winds and 20–50% shower chances tied to an incoming front. This divergence in guidance on post-frontal cooling, cloud cover, and mixing drives the closely matched market-implied odds, with the 61°F-or-below bin leading at 25%. Traders weigh historical October variability and the timing of any temperature drop against the risk of delayed cooling. Updated model runs and National Weather Service briefings over the next 48 hours will likely narrow the range ahead of market resolution.