US Records Hottest Summer in History, NOAA Reports
US Records Hottest Summer in History, NOAA Reports
US · Published Sep 10, 2026
• The contiguous United States experienced its hottest summer on record in 2026, with an average temperature of 74.4°F (23.6°C) from June to August, according to the National Oceanic and Atmospheric Administration (NOAA).
• This surpassed the previous record set in 1936 and 2021 by 0.4°F.

Impact & Risks

The extreme heat has led to increased heat stress, higher energy demands for cooling, and strain on infrastructure and public health systems. Drought conditions have worsened, with nearly 60% of the contiguous U.S. experiencing drought by September 1. Lake Mead, the nation's largest reservoir, dropped to its lowest level on record. Severe storms also brought heavy rainfall to some areas, such as central Indiana, while other regions faced declining water reserves. The ongoing El Niño is expected to exacerbate these conditions, potentially making 2026 the hottest year on record.

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