It happened around 11:15 a.m. Thursday at Roxborough High School.
A School District of Philadelphia spokesperson confirmed the accident.
Philadelphia police say the woman was pronounced dead at 12:20 p.m.
All light poles are being inspected at tracks throughout the school district. The track at Roxborough is closed.
Roxborough High School students will be sent home with letters notifying parents about the incident.
Investigators are working to determine whether Thursday's high winds caused the pole to fall.