Expires:202605201200;;316528 FPUS51 KPHI 192312 ZFPPHI Zone Forecast Product for SE PA, Northern Delmarva, and NJ National Weather Service Mount Holly NJ 710 PM EDT Tue May 19 2026 PAZ103-201200- Western Montgomery- Including the cities of Collegeville and Pottstown 710 PM EDT Tue May 19 2026 ...HEAT ADVISORY NOW IN EFFECT UNTIL 8 PM EDT WEDNESDAY... .TONIGHT...Partly cloudy. A slight chance of showers this evening. Lows in the lower 70s. Southwest winds 5 to 10 mph. Chance of rain 20 percent. .WEDNESDAY...Sunny in the morning, then partly sunny with showers likely with a chance of thunderstorms in the afternoon. Hot with highs in the lower 90s. Temperature falling into the mid 80s in the afternoon. West winds 5 to 10 mph. Chance of rain 70 percent. .WEDNESDAY NIGHT...A chance of showers and thunderstorms in the evening, then showers likely after midnight. Much cooler with lows in the mid 50s. North winds 5 to 10 mph. Chance of rain 70 percent. .THURSDAY...Mostly cloudy. Showers likely, mainly in the morning. Not as warm with highs in the mid 60s. Northeast winds 5 to 10 mph. Chance of rain 60 percent. .THURSDAY NIGHT...Mostly cloudy. Lows around 50. East winds around 5 mph, becoming northeast after midnight. .FRIDAY...Partly sunny in the morning, then becoming mostly cloudy. A 50 percent chance of showers. Highs in the mid 60s. .FRIDAY NIGHT...Showers. Lows in the upper 40s. Chance of rain 80 percent. .SATURDAY...Showers. Highs in the upper 50s. Chance of rain 90 percent. .SATURDAY NIGHT...Showers. Lows around 50. Chance of rain 80 percent. .SUNDAY...Mostly cloudy. Showers likely, mainly in the morning. Highs in the upper 60s. Chance of rain 60 percent. .SUNDAY NIGHT...Mostly cloudy with a 50 percent chance of showers. Lows in the mid 50s. .MEMORIAL DAY...Mostly cloudy with a 40 percent chance of showers. Highs in the mid 70s. .MONDAY NIGHT...Mostly cloudy. A chance of showers after midnight. Lows in the upper 50s. Chance of rain 40 percent. .TUESDAY...Mostly cloudy with a chance of showers. Highs in the upper 70s. Chance of rain 40 percent. $$