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Heffernan, PA Weather Forecast
Heffernan, PA Weather Forecast Date: 228 AM EDT Sun Aug 16 2026
The area/counties/county of: Eastern Montgomery, including the cities of: Norristown and Lansdale.or toggle through each period.
Rest of Tonight... Partly cloudy. Patchy fog. Near steady temperature in the upper 60s. Southeast winds around 5 mph.
Sunday... Patchy fog in the morning. Showers with a slight chance of thunderstorms in the afternoon. Humid with highs in the lower 80s. Temperature falling into the lower 70s in the afternoon. South winds 5 to 10 mph. Gusts up to 25 mph in the afternoon. Chance of rain near 100%.
Sunday Night... Showers with a chance of thunderstorms. Patchy fog after midnight. Humid. Near steady temperature around 70. South winds 5 to 10 mph. Gusts up to 25 mph in the evening. Chance of rain 90%.
Monday... Partly sunny. Patchy fog in the morning. A chance of showers and thunderstorms in the afternoon. Hot with highs in the upper 80s. West winds around 5 mph. Chance of rain 40%.
Monday Night... Partly cloudy in the evening, then clearing. Humid with lows in the upper 60s. Northwest winds around 5 mph.
Tuesday... Sunny, hot with highs in the mid 80s.
Tuesday Night... Mostly clear. Lows in the mid 60s.
Wednesday... Sunny, hot with highs in the upper 80s.
Wednesday Night... Partly cloudy in the evening, then becoming mostly cloudy. A chance of showers. Lows in the upper 60s. Chance of rain 40%.
Thursday... Partly sunny with a chance of showers. Hot with highs in the mid 80s. Chance of rain 40%.
Thursday Night... Partly cloudy. A chance of showers in the evening. Lows in the lower 60s. Chance of rain 40%.
Friday... Mostly sunny. A chance of showers in the afternoon. Highs in the lower 80s. Chance of rain 30%.
Friday Night... Mostly cloudy with a 40% chance of showers. Lows in the mid 60s.
POP = Probability of Precipitation
Heffernan Radar Loop
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