National Weather Service forecasts for Miami on April 12 indicate highs clustering in the 78-81°F range under mostly sunny skies, driven by persistent east-northeast winds of 10-15 mph from high pressure over the Southeast, which advects cooler Atlantic air and suppresses temperatures below the April normal of 83°F. This onshore flow, continuing from a weak front's passage earlier this week, has kept recent highs in the upper 70s to low 80s, with model consensus from NOAA guidance showing minimal spread but sensitivity to sea breeze timing and afternoon cloud development. Trader sentiment splits evenly between 78-79°F and 80-81°F outcomes at 40.5% implied probabilities each, highlighting uncertainty in peak heating; watch for morning soundings and updated 12Z model runs for potential shifts ahead of resolution based on Miami International Airport observations.