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 57°F 2025-09-22T05:51:00-04:00 
Today 2025-09-22, Mostly Sunny. Mostly sunny, with a high near 77. Calm wind becoming south around 5 mph in the afternoon.
Tonight 2025-09-22, Partly Cloudy. Partly cloudy, with a low around 60. South wind around 5 mph.Tuesday 2025-09-23, Partly Sunny then Chance Showers. A chance of showers between 2pm and 5pm, then a chance of showers and thunderstorms after 5pm. Partly sunny, with a high near 79. Southwest wind around 5 mph. Chance of precipitation is 50%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Tuesday Night 2025-09-23, Chance Showers. A chance of showers and thunderstorms. Mostly cloudy, with a low around 63. Southwest wind around 5 mph. Chance of precipitation is 50%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.Wednesday 2025-09-24, Mostly Cloudy then Chance Showers. A slight chance of showers before 8am, then a chance of showers after 2pm. Mostly cloudy, with a high near 78. West wind around 5 mph. Chance of precipitation is 40%. New precipitation amounts of less than a tenth of an inch possible.
Wednesday Night 2025-09-24, Showers Likely. Showers likely, mainly after 2am. Cloudy, with a low around 65. Chance of precipitation is 60%. New precipitation amounts between a quarter and half of an inch possible.
Thursday 2025-09-25, Showers Likely. Showers likely. Cloudy, with a high near 74. Chance of precipitation is 70%.
Thursday Night 2025-09-25, Showers Likely. Showers likely before 8pm, then showers likely and possibly a thunderstorm between 8pm and 2am, then showers likely after 2am. Cloudy, with a low around 64. Chance of precipitation is 70%.Friday 2025-09-26, Chance Showers then Chance T-storms. A chance of showers, with thunderstorms also possible after 2pm. Mostly cloudy, with a high near 75. Chance of precipitation is 50%.
- Friday Night 2025-09-26, Showers Likely. Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 62. Chance of precipitation is 60%.
Saturday 2025-09-27, Chance Showers. A chance of showers. Mostly cloudy, with a high near 75. Chance of precipitation is 50%.
Saturday Night 2025-09-27, Chance Showers. A chance of showers. Mostly cloudy, with a low around 61. Chance of precipitation is 40%.Sunday 2025-09-28, Partly Sunny then Chance Showers. A chance of showers. Partly sunny, with a high near 76. Chance of precipitation is 30%.