November in Lake Oswego is the windiest month of the year. In November, the weather in Lake Oswego is typically warm. Average daily high temperature in November is about 10 degrees above zero. On average, Lake Oswego has 21 rainy, 5 sunny, 3 cloudy, and 1 partly cloudy day in November. The rains are usually heavy. November as well as January, February, March, and April is considered the most uncomfortable time to visit Lake Oswego.