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 70°F 2025-08-14T01:53:00-04:00 
Overnight 2025-08-14, Slight Chance Showers. A slight chance of showers before 5am. Mostly cloudy, with a low around 66. Calm wind. Chance of precipitation is 20%.
Thursday 2025-08-14, Chance T-storms. A chance of showers and thunderstorms, mainly between 2pm and 3pm. Partly sunny, with a high near 87. Calm wind becoming north around 5 mph 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.
Thursday Night 2025-08-14, Partly Cloudy. Partly cloudy, with a low around 65. Calm wind.Friday 2025-08-15, Sunny then Slight Chance T-storms. A slight chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 88. Light and variable wind. Chance of precipitation is 20%.
- Friday Night 2025-08-15, Partly Cloudy. Partly cloudy, with a low around 66. Calm wind.
Saturday 2025-08-16, Mostly Sunny then Slight Chance T-storms. A slight chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 88. Chance of precipitation is 20%.
Saturday Night 2025-08-16, Mostly Clear. Mostly clear, with a low around 66.Sunday 2025-08-17, Sunny then Chance Showers. A chance of showers after 2pm. Mostly sunny, with a high near 91. Chance of precipitation is 30%.
Sunday Night 2025-08-17, Chance Showers then Partly Cloudy. A chance of showers before 8pm. Partly cloudy, with a low around 66. Chance of precipitation is 30%.
Monday 2025-08-18, Mostly Sunny then Chance T-storms. A chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 89. Chance of precipitation is 30%.
Monday Night 2025-08-18, Chance T-storms then Partly Cloudy. A chance of showers and thunderstorms. Partly cloudy, with a low around 63. Chance of precipitation is 30%.
Tuesday 2025-08-19, Mostly Sunny then Chance Showers. A chance of showers. Partly sunny, with a high near 86. Chance of precipitation is 40%.
Tuesday Night 2025-08-19, Chance Showers. A chance of showers. Mostly cloudy, with a low around 63. Chance of precipitation is 40%.
Wednesday 2025-08-20, Chance Showers. A chance of showers. Partly sunny, with a high near 82. Chance of precipitation is 40%.