Saint Marys, PA (15857)

Today

Mostly cloudy skies with scattered thunderstorms developing this afternoon. Some of the storms may become severe. Damaging winds, large hail and possibly a tornado with some storms. High 73F. Winds SSW at 10 to 15 mph. Chance of rain 50%..

Tonight

Scattered thunderstorms, some strong early, then variable clouds overnight with still a chance of showers. Damaging winds, large hail and possibly a tornado with some storms. Low 59F. Winds W at 5 to 10 mph. Chance of rain 40%.

Updated: July 21, 2026 @ 5:57 am