I-78 weather conditions near Jonestown, Pennsylvania
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Seasoned Weather Conditions
Current Weather Conditions
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7 day weather forecast
Current condition: Fog/Mist 64°F 2025-06-16T23:55:00-04:00 
Overnight 2025-06-17, Scattered Showers. Scattered showers, mainly before 5am. Cloudy, with a low around 62. Light east wind. Chance of precipitation is 30%.
Tuesday 2025-06-17, Chance Showers. Scattered showers, with thunderstorms also possible after 2pm. Cloudy, with a high near 75. Southeast wind 3 to 6 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 2025-06-17, Showers Likely. Showers and thunderstorms likely before 5am, then a chance of showers. Cloudy, with a low around 67. Southeast wind around 5 mph becoming calm after midnight. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.Wednesday 2025-06-18, Chance T-storms then T-storms. A chance of showers before 11am, then a chance of showers and thunderstorms between 11am and 2pm, then showers and possibly a thunderstorm after 2pm. High near 85. Calm wind becoming southwest 5 to 7 mph in the afternoon. Chance of precipitation is 80%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Wednesday Night 2025-06-18, Showers then Slight Chance Showers. Showers and thunderstorms before 11pm, then a slight chance of showers between 11pm and 2am. Low around 70. Light southwest wind. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Juneteenth 2025-06-19, Chance T-storms then Showers Likely. A chance of showers before 11am, then a chance of showers and thunderstorms between 11am and 2pm, then showers likely and possibly a thunderstorm after 2pm. Mostly sunny, with a high near 88. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Thursday Night 2025-06-19, Showers Likely then Mostly Clear. Showers likely before 8pm. Partly cloudy, with a low around 63. Chance of precipitation is 60%.
Friday 2025-06-20, Sunny. Sunny, with a high near 84.
Friday Night 2025-06-20, Partly Cloudy. Partly cloudy, with a low around 62.
Saturday 2025-06-21, Mostly Sunny. Mostly sunny, with a high near 86.
Saturday Night 2025-06-21, Mostly Cloudy. Mostly cloudy, with a low around 67.
Sunday 2025-06-22, Hot. Mostly sunny and hot, with a high near 92.
Sunday Night 2025-06-22, Mostly Clear. Mostly clear, with a low around 72.- Monday 2025-06-23, Hot. Mostly sunny and hot, with a high near 95.