Excessive Heat — Western Chester, Pennsylvania

2025-06-23 to 2025-06-25 · Western Chester, Pennsylvania

Event narrative

Three days of high heat and humidity brought extreme heat indices. The heat index peaked at 110 degrees on June 23rd and 105 degrees on June 25th, as measured at Chester County Airport.

Wider weather episode

A strong ridge of surface and upper level high pressure parked itself over much of the eastern United States, resulting in widespread extreme heat and humidity.

Source: NOAA Storm Events Database, event_id 1268060. Narrative written by the NWS forecast office that issued the report.