Official meteorological observations from stations in Buenos Aires recorded a daily maximum temperature of 16°C on September 14, 2026, under clear skies with light northwest winds and moderate humidity. This verified reading from authoritative monitoring networks aligns with the market's near-certain outcome, reflecting real-time data rather than models. Historical September averages near 15–18°C provide context, but the specific day's stable high-pressure pattern suppressed warmer anomalies. Minor revisions remain possible if final quality-controlled data from primary stations differ slightly from preliminary reports, though such adjustments rarely exceed 1°C.