January in Altoona is the snowiest, the cloudiest, and the coldest month of the year. In January, the weather in Altoona is typically freezing. Average daily high temperature in January is about 1 degree above zero. On average, Altoona has 9 cloudy, 9 partly cloudy, 5 rainy, 5 snowy, and 3 sunny days in January. The rains are usually heavy. January as well as February, March, April, and May is considered the most uncomfortable time to visit Altoona.