July 2026 has officially become the hottest month ever recorded across the contiguous United States, according to newly released federal climate data.
The average temperature across the lower 48 states reached 76.9°F, making it the warmest month in the national temperature record, which stretches back to 1895. The figure surpassed the previous record for any month and reflected the extraordinary heat experienced across large portions of the country.
The record was not limited to a handful of cities. Widespread heat affected the West, Rockies, parts of the Midwest, the Gulf Coast and the Southeast during the month. Several locations experienced prolonged periods of temperatures far above their usual July averages.
Repeated Heat Domes Intensify Conditions
One of the major factors behind July’s exceptional temperatures was a series of powerful heat domes. These weather patterns can trap hot air over a region for extended periods, allowing temperatures to remain dangerously high for days at a time.
Wyoming recorded its hottest July on record, with temperatures averaging about 5.1°F above normal. Other communities across the country also reported unusually persistent heat, with numerous locations reaching their highest monthly averages on record.
The extreme conditions created problems beyond uncomfortable temperatures. Heatwaves increased demand for air conditioning, contributed to wildfire risks and affected outdoor activities, travel and daily routines.
Wildfire smoke also added another challenge during the period, particularly in parts of the West and Pacific Northwest, where fires in the United States and Canada affected air quality.
Global Temperatures Remain Exceptionally High
The U.S. record occurred against a backdrop of unusually warm conditions around the world.
According to the National Oceanic and Atmospheric Administration’s global assessment, July 2026 was tied with July 2024 as the warmest July in the global temperature record. Global surface temperatures were 1.18°C above the 20th-century average, demonstrating that exceptional heat was not confined to North America.
Scientists say human-driven climate change is increasing the likelihood and intensity of extreme heat events. Rising concentrations of heat-trapping greenhouse gases are contributing to higher baseline temperatures, meaning heatwaves can become more severe when natural weather patterns amplify them.
The continuing warmth is raising concerns about the wider effects of climate change, including pressure on energy systems, water supplies, ecosystems and public health.
What the Record Means for the Future
A single month’s temperature record does not determine the climate trend by itself, but the latest figures add to a broader pattern of increasingly frequent and intense heat events.
Communities are now facing greater pressure to prepare for extreme temperatures through improved warning systems, cooling centers, resilient infrastructure and emergency planning.
As summer progresses, scientists and climate officials will continue monitoring temperature patterns across the country and around the world. July’s record serves as another indication that extreme heat is becoming an increasingly important environmental and public health challenge.
