Recent forecast models from Argentina's Servicio Meteorológico Nacional indicate a cool southerly air mass and increased cloud cover will limit daytime heating in Buenos Aires on May 18, positioning 16°C as the market's leading outcome at 37% implied probability. This reflects consensus among ensemble runs showing maximum temperatures clustering between 15–17°C, consistent with mid-May climatology where frontal passages often suppress highs below the 18–19°C seasonal norm. Historical observations from Ministro Pistarini International Airport confirm similar patterns during transitional autumn conditions, with light winds and partial cloudiness reducing solar insolation. Traders are monitoring the next model update for any shifts in the cold front timing that could alter the exact peak.