Lake Oswego, OR enjoys a mild climate year round with temperatures rarely falling below freezing and warm summers. It is located in the rain shadow of the Cascade Mountains, so it receives less rainfall than other areas in the state. Average annual precipitation for Lake Oswego is approximately 36 inches, with most rain occurring from November to March. The area often experiences dry conditions during the spring and summer months. Summer months are typically warm and sunny, with temperatures averaging between 70-87°F. Winter temperatures average between 35-45°F but can drop down below freezing due to cold fronts coming off the nearby mountains. With its mild climate, Lake Oswego is an ideal place to enjoy outdoor activities all year round.
Lake Oswego, Oregon gets 42 inches of rain, on average, per year. The US average is 38 inches of rain per year.
Lake Oswego averages 2 inches of snow per year. The US average is 28 inches of snow per year.
On average, there are 141 sunny days per year in Lake Oswego. The US average is 205 sunny days.
Lake Oswego gets some kind of precipitation, on average, 147 days per year. Precipitation is rain, snow, sleet, or hail that falls to the ground. In order for precipitation to be counted you have to get at least .01 inches on the ground to measure.
Weather Highlights
Summer High: the July high is around 81 degrees
Winter Low: the January low is 37
Rain: averages 42 inches of rain a year
Snow: averages 2 inches of snow a year