**Recent forecasts from numerical weather models and the Servicio Meteorológico Nacional indicate a daily maximum near 13°C for Buenos Aires on July 19, consistent with the market’s leading outcomes clustered at 13–15°C (combined ~80% implied probability).** Mid-July places the region in the heart of Southern Hemisphere winter, when climatological average highs hover around 14–15°C under the influence of cooler maritime polar air masses and frequent frontal passages. A warming spell earlier in the week, driven by northwesterly flow that pushed temperatures toward 22–24°C on July 17, has given way to a southward surge of cooler air, lowering expected maxima and tightening the distribution around 13–15°C. Ensemble guidance shows limited spread, with resolution hinging on official station readings that capture urban heat-island effects and precise timing of any residual cloud cover or light precipitation. Traders are pricing in this post-frontal cooling while assigning low probability to extremes, reflecting both the narrow forecast range and historical July variability rarely exceeding 18–19°C or dropping below 11°C on any single day.