**Forecast models from the National Weather Service and local outlets currently point to an overnight low in the low-to-mid 60s°F for Denver on September 13, 2026, aligning with the market’s tightest probabilities around 60–63°F.** Recent NWS point forecasts and station guidance show temperatures bottoming out near 61–66°F overnight under partly cloudy skies, with light southerly or variable winds and dew points in the upper 40s to low 50s°F that limit excessive cooling. This setup favors moderate radiative cooling typical for Denver’s high-plains location in mid-September, when average lows hover near 50°F but current warm advection keeps readings elevated. Trader consensus clusters on 60–63°F because ensemble guidance shows limited spread, though slight variations in cloud cover timing or wind could nudge the minimum a degree or two. Lower bins (57°F or below) reflect scenarios with clearer skies and stronger cooling, while warmer outcomes above 65°F would require persistent clouds or delayed cooling. The next updated NWS forecast runs and hourly observations on the 13th will likely refine these probabilities as resolution approaches.