September weather forecast in Alpine

September in Alpine is the rainiest month of the year. In September, the weather in Alpine is typically warm. Average daily high temperature in September is about 24 degrees above zero. On average, Alpine has 12 sunny, 10 rainy, and 8 partly cloudy days in September. The rains are usually moderate. September as well as January, July, August, and December is considered the most uncomfortable time to visit Alpine.