Blair County Weather Outlook Altoona, Pennsylvania Weather 50F Clear Forecast for Today Sunny. Highs in the upper 70s. East winds around 5 mph. Forecast for Tonight Mostly clear. Lows around 50. East winds around 5 mph. Becoming light and variable. Forecast for Thursday Sunny. Highs in the mid 80s. East winds around 5 mph. Becoming southeast. Forecast for Thursday Night Mostly clear in the evening. Then becoming partly cloudy. Lows in the upper 50s. Southeast winds around 5 mph. Forecast for Friday Mostly sunny. Highs in the lower 80s. Southeast winds 5 to 10 mph. Forecast for Friday Night Partly cloudy. Lows around 60. Last update Wed, 20 Aug 2008 04:53 www.rssWeather.com