I-78 weather conditions near Allentown, Pennsylvania
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Seasoned Weather Conditions
Current Weather Conditions
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7 day weather forecast
Current condition: Overcast 69°F 2025-09-23T22:51:00-04:00 
Overnight 2025-09-24, Slight Chance Showers. A slight chance of showers between 4am and 5am. Mostly cloudy, with a low around 64. Calm wind. Chance of precipitation is 20%.Wednesday 2025-09-24, Mostly Cloudy then Chance Showers. A chance of showers and thunderstorms, mainly between 4pm and 5pm. Mostly cloudy, with a high near 81. Calm wind. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Wednesday Night 2025-09-24, Showers. A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 8pm. Low around 66. Calm wind becoming southeast around 5 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Thursday 2025-09-25, Showers. Showers and possibly a thunderstorm. High near 76. South wind around 5 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Thursday Night 2025-09-25, Showers Likely. Showers likely, mainly before 2am. Mostly cloudy, with a low around 64. Southwest wind around 5 mph. Chance of precipitation is 70%. New precipitation amounts between a quarter and half of an inch possible.
Friday 2025-09-26, Chance Showers. A chance of showers, mainly after 2pm. Partly sunny, with a high near 79. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.
Friday Night 2025-09-26, Chance Showers. A chance of showers. Mostly cloudy, with a low around 60. Chance of precipitation is 30%.Saturday Night 2025-09-27, Chance Showers then Mostly Cloudy. A chance of showers before 8pm. Mostly cloudy, with a low around 60. Chance of precipitation is 30%.
Sunday 2025-09-28, Mostly Sunny. Mostly sunny, with a high near 82.
Sunday Night 2025-09-28, Partly Cloudy. Partly cloudy, with a low around 57.- Monday 2025-09-29, Mostly Sunny. Mostly sunny, with a high near 79.
- Monday Night 2025-09-29, Partly Cloudy. Partly cloudy, with a low around 56.
- Tuesday 2025-09-30, Mostly Sunny. Mostly sunny, with a high near 77.