NOAA reports July 2023 as hottest U.S. month on record

July was the hottest month ever recorded in the contiguous United States, federal climate scientists confirmed Friday. The National Oceanic and Atmospheric Administration said average temperatures across the Lower 48 states and Washington, D.C. reached 76.9°F in July — about 0.1 to 0.2 degrees hotter than the previous record set in July 1936 and July 2012. The agency’s records go back 128 years.

This record isn’t just a statistical milestone — it’s part of a clear warming trend driven by human-caused climate change. Heat-trapping greenhouse gases have pushed global temperatures up by about 2°F since the late 1800s, and the U.S. has warmed even faster. July’s extreme heat was fueled by persistent high-pressure systems that trapped hot air over large parts of the country, especially in the southern and western regions. Texas, Oklahoma, and New Mexico all saw their hottest Julys on record. Climate scientists warn that such records will become more common as global warming accelerates.

The heat wasn’t just uncomfortable — it was dangerous. More than 100 million Americans faced extreme heat warnings in July, with hospitals reporting surges in heat-related illnesses. Drought conditions worsened in the West, deepening water shortages and increasing wildfire risks. Meanwhile, cities like Phoenix and Las Vegas broke daily temperature records, with Phoenix hitting 110°F or higher on 31 days in July alone. NOAA climatologists say the U.S. has experienced 10 billion-dollar weather disasters so far this year — eight of them involving extreme heat or flooding.

What happens next depends on how quickly emissions are cut. If current trends continue, NOAA projects more frequent and intense heat waves, especially in the South and Southwest. Scientists say the U.S. must adapt with better cooling infrastructure, early warning systems, and resilient power grids. The record July isn’t an outlier — it’s a preview of what’s to come unless emissions fall sharply. In short, this isn’t just the hottest July on record. It’s a warning.