Multiple US States Record Highest July Humidity, Temperatures in 2025

July 2025 was marked by extreme heat and humidity across many parts of the United States, setting new records in several regions. States like Ohio, Kentucky, Illinois, Tennessee, and Florida experienced triple-digit heat indices, with cities such as Washington, D.C., Pittsburgh, and Roanoke breaking records for the most humid days ever recorded. In Kentucky, Paducah endured the longest stretch of continuous high humidity in 75 years, with hours of extreme humidity tripling the usual July amount. In North Carolina's Triangle region, July 2025 was the hottest July on record, driven by unusually high overnight lows that kept average temperatures elevated despite no triple-digit days. Similarly, Jacksonville, Florida, recorded its hottest July ever, with nearly every day above average and a high number of days exceeding 90 degrees, placing 2025 among the warmest years on record. Experts attribute these extreme weather patterns to climate change fueled by fossil fuel emissions, which heighten health risks, especially from heat-related illnesses affecting vulnerable populations.