I-99 weather conditions near Altoona, Pennsylvania
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Seasoned Weather Conditions
Current Weather Conditions
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7 day weather forecast
Current condition: Fog/Mist 63°F 2025-06-17T03:53:00-04:00 
Overnight 2025-06-17, Showers Likely and Patchy Dense Fog. A chance of showers, then showers likely and possibly a thunderstorm after 5am. Patchy dense fog. Otherwise, cloudy, with a low around 61. Light southeast wind. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.Tuesday 2025-06-17, Chance Showers and Patchy Dense Fog then Heavy Rain. A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 2pm. Some of the storms could produce heavy rainfall. Patchy dense fog before 9am. High near 77. South wind 3 to 6 mph. Chance of precipitation is 80%. New rainfall amounts between 1 and 2 inches possible.
Tuesday Night 2025-06-17, Heavy Rain then Showers Likely. Showers and possibly a thunderstorm, mainly before 1am, then a chance of showers and thunderstorms after 1am. Some of the storms could produce heavy rainfall. Low around 66. Light south wind. Chance of precipitation is 100%. New rainfall amounts between 1 and 2 inches possible.
Wednesday 2025-06-18, Showers. Showers and possibly a thunderstorm. High near 84. Calm wind becoming southwest around 6 mph in the afternoon. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Wednesday Night 2025-06-18, Slight Chance Showers. A slight chance of showers. Mostly cloudy, with a low around 69. Southwest wind around 6 mph. Chance of precipitation is 20%.
Juneteenth 2025-06-19, 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 cloudy, with a high near 83. 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 Partly Cloudy. Showers likely and possibly a thunderstorm before 8pm. Mostly cloudy, with a low around 60. Chance of precipitation is 60%.
Friday 2025-06-20, Mostly Sunny. Mostly sunny, with a high near 82.
Friday Night 2025-06-20, Partly Cloudy. Partly cloudy, with a low around 63.- Saturday 2025-06-21, Mostly Sunny. Mostly sunny, with a high near 89.
- Saturday Night 2025-06-21, Partly Cloudy. Partly cloudy, with a low around 69.
Sunday 2025-06-22, Hot. Mostly sunny and hot, with a high near 93.
Sunday Night 2025-06-22, Mostly Clear. Mostly clear, with a low around 71.- Monday 2025-06-23, Hot. Sunny and hot, with a high near 94.