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: Fair 73°F 2025-08-15T02:51:00-04:00 
Overnight 2025-08-15, Mostly Clear. Mostly clear, with a low around 69. Calm wind.Friday 2025-08-15, Sunny then Chance Showers. A chance of showers, with thunderstorms also possible after 5pm. Sunny, with a high near 88. Northeast wind around 5 mph becoming southeast in the afternoon. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Friday Night 2025-08-15, Chance Showers. A chance of showers and thunderstorms before 11pm, then a slight chance of showers between 11pm and 2am. Partly cloudy, with a low around 68. Southeast wind around 5 mph becoming calm in the evening. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.Saturday 2025-08-16, Partly Sunny then Slight Chance T-storms. A slight chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 87. East wind around 5 mph becoming south in the afternoon. Chance of precipitation is 20%.
- Saturday Night 2025-08-16, Mostly Clear. Mostly clear, with a low around 67. South wind around 5 mph becoming calm.
Sunday 2025-08-17, Sunny then Chance T-storms. A chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 89. Chance of precipitation is 40%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Sunday Night 2025-08-17, Chance T-storms then Chance Showers. A chance of showers and thunderstorms before 8pm, then a chance of showers between 8pm and 2am. Partly cloudy, with a low around 67. Chance of precipitation is 30%.
Monday 2025-08-18, Partly Sunny. Partly sunny, with a high near 81.- Monday Night 2025-08-18, Partly Cloudy. Partly cloudy, with a low around 62.
- Tuesday 2025-08-19, Partly Sunny. Partly sunny, with a high near 78.
Tuesday Night 2025-08-19, Chance Showers. A chance of showers. Mostly cloudy, with a low around 61. Chance of precipitation is 30%.
Wednesday 2025-08-20, Chance Showers. A chance of showers. Partly sunny, with a high near 77. Chance of precipitation is 30%.
Wednesday Night 2025-08-20, Mostly Cloudy. Mostly cloudy, with a low around 59.
Thursday 2025-08-21, Mostly Sunny. Mostly sunny, with a high near 81.