Forecast models from the National Weather Service and other agencies show a cooler air mass and northerly winds arriving over Denver by September 30, with highs most likely in the low-to-mid 60s°F amid widespread cloud cover and a 50-70% chance of showers or thunderstorms. This setup favors the closely matched 60-65°F bins because daytime heating will be limited by reduced solar radiation and evaporative cooling from precipitation, consistent with climatological norms for late September when frontal passages often cap temperatures near 65°F. Model consensus remains tight on the overall cooling trend, yet small differences in storm timing or intensity create the even distribution across leading outcomes, with traders awaiting updated runs closer to resolution.