Trader consensus on Polymarket reflects National Weather Service guidance forecasting a high near 58°F in Denver on April 18 under sunny skies and light winds (5-8 mph west-southwest shifting north-northwest), following snow showers (90% chance) on April 17 and a Freeze Watch overnight into early Saturday morning. The tight clustering around 56-59°F stems from inherent uncertainty in post-frontal recovery, with ensemble models like GFS and ECMWF showing spread due to potential lingering low-level clouds, cool air mass advection at 850 mb, and limited boundary layer mixing from gusty but variable winds up to 16 mph. Compared to the April climatological normal of 61°F, deeper tropospheric cooling supports the subdued outlook; watch for 12z model updates and afternoon NWS revisions that could tip the balance toward 54-55°F if cloud persistence increases or 60°F+ with faster warming.