Trader consensus on Polymarket closely splits between 62-63°F (34%) and 64-65°F (33%), reflecting National Weather Service ensemble guidance and GFS/ECMWF model runs projecting Los Angeles highs near 64°F on April 13 amid persistent onshore flow and a deep marine layer. This cool bias—well below the mid-April climatological average of 72°F—stems from a strong coastal inversion layer, observed at around 1,500 feet deep over the past 24 hours, trapping cool Pacific air and limiting boundary layer mixing despite moderate 10-15 kt westerly winds. Differentiating the top bins are subtle model discrepancies in marine layer persistence, afternoon stratus clearing potential, and wind-driven ventilation; fuller burn-off could nudge toward 65-67°F (22%), while deeper clouds favor 62-63°F. New 12Z model cycles and NWS updates this afternoon may sharpen the outlook ahead of resolution via official downtown LAX observations.