US March 2026 Shatters 132-Year Heat Record by 9.35°F, Super El Niño Forecast Ahead

March 2026 marked the most abnormally hot month in 132 years for the continental US, averaging 50.85°F (10.47°C), 9.35°F (5.19°C) above 20th-century norms. Over 19,800 daily heat records shattered, with April 2025-March 2026 as the warmest 12-month span on record. Super-strong El Niño forecasts signal intensified global warmth.